IMac tries to start in safe mode but fails.

I have a Mid 2010 iMac running Maverick. I added 16gb of ram to the 4 existing which I have done on many Macs. It started up but after a minute or two it forced restarted on its own. I then tried it a few more times and continued to crash then restart. I started it in safe mode. It nearly loaded completely the safe start then shut down. Any time I now try to start it, it does the same thing, starts in safe mode then fails. I have taken the 16 extra gas of ram out and it still fails to load. Any advice would be greatly appreciated!

Have you tried repairing the disk? I know it seems simple but sometimes this can be the problem.
Hold down Command+R when starting the computer, select repair disk from the menu.
This won't delete any data and may not work but it's worth a try.

Similar Messages

MacBook pro will not boot. I get the gray screen, an apple icon and spinning wheel. Tried to start in safe mode but get the same screen. The only thing different was that I loaded the zedge sync app yesterday. Now getting this problem.

Macbook pro will not boot. I get the gray screen, an apple icon and spinning wheel. I tried to start in safe mode, but get this same screen. The only thing different is that I added the zedge update app to do a sync for adding ringtones to my apple cell phone. How can I get a good boot. I am fairly new to apple computer.

Reset PRAM: http://support.apple.com/kb/PH4405 and then try a normal boot.
Run the Startup Manager to select Startup disk: http://support.apple.com/kb/HT1310
If those did not work your disk may be sick or dying. The top priority at this point is to make a backup copy of your data.
Check the health of the disk. Boot in Recovery Mode (Boot, Command-R). Run Disk Utility. Click on the upper left disk icon. Does the S.M.A.R.T. status say “Verified”? If not the disk/SSD is unhealthy and needs to be replaced. Even if it does not show “Verified” you can still attempt a backup.
Click on the icon indented below, usually called “Macintosh HD” and Verify Disk. If it finishes with a green “OK” message then all is well with the disk. If it shows errors in red then you have found a problem to address once the system is backed up. Do not attempt software repairs until you have secured the data.
If the disk will not show up at all in Disk Utility as your ran the tests above then it may be dead or it may have a bad internal SATA cable. A trip to an Apple store for confirmation would be in order.
If you have an external disk drive you can use as a backup drive then do so. If not Google “Hitachi USB 3.0 external hard drive 1TB” to purchase one or go to a brick-and-mortar store (including an Apple store) to pickup one. Any 1 TB external drive will do.
Assuming it is still breathing you can try to recover the data without booting from the sick disk.
Reformat the external disk. (This will erase all data on the external disk.)
Boot in Recovery Mode. Start Disk Utility. Plug in the new disk. Select it’s disk Icon (the second one down, left justified). Select the Partition tab.
Partition Layout > Single Partition
Name: Emergency Recovery 1 (or whatever name you wish to use)
Format: Mac OS Extended (journaled)
Options… > GUID Partition Table > OK
Apply
Select the Restore tab.
Drag the old system volume (Macintosh HD) to Source.
Drag the new disk volume (Emergency Recovery 1) to Destination.
Click on Restore.
It may take a long time for the backup.
If that will not complete post back for other emergency data recovery methods, including those from a brody.
If the backup succeeds, use the First Aid tab in Disk Utility to select the old volume (Macintosh HD) and Repair Disk. If it does not finish with a green OK message try to repair it once or twice more. If it repairs with a green OK message, will it boot normally? If not, boot from the Recovery Partition and reinstall OS X.
If it is still not healthy, post back for further instructions.

I don't have my navigation bar at all. I tried to start in safe mode but I never get the dialog box the y say you should get to reset to defaults. Help?

i don't have my navigation bar at all. I tried to start in safe mode but I never get the dialog box the y say you should get to reset to defaults. Help? I have even uninstalled and reloaded firefox
== This happened ==
Every time Firefox opened
== My wife hit a button and doesn' know what happened

See if this helps. View > Toolbars, if no check beside Navigation Bar, click on Navigation Bar to check it.
'''Can't see the Menu Bar''' (File, Edit, View, History, Bookmarks, Tools, Help)?
Turning the Menu Bar on and off is a new feature in version 3.6.
''(~~red:Linux & OSX see~~: [[Menu bar is missing]] )''
''Windows'' Method 1. '''''Hold down''''' the key and press the following letters in this exact order: V T M then release the key
''Windows'' Method 2. Tap once on the F10 key, while the Menu bar is visible, choose "View > Toolbars", click "Menu Bar" so that a check mark is placed next to Menu Bar
''Windows'' Method 3. Tap once and release the key. The Menu Bar will be displayed; then choose ~~red:V~~iew > ~~red:T~~oolbars and click on ~~red:M~~enu Bar so that a check mark is placed next to Menu Bar
The Menu Bar should now be displayed permanently, unless you turn it off again using View > Toolbars. Check mark = displayed, NO check mark = not displayed.
See:
http://support.mozilla.com/en-US/kb/Menu+bar+is+missing
http://kb.mozillazine.org/Toolbar_customization#Restoring_missing_menu_or_other_toolbars
'''Navigation Toolbar, Bookmarks Toolbar and other Toolbars''' under View > Toolbars. Clicking on one of them will place a check mark (display) or remove the check mark (not displayed).
'''To display the Status Bar''', View, then click Status bar to place a check mark (display) or remove the check mark (not displayed).
'''Full Screen mode'''
http://kb.mozillazine.org/Netbooks#Full_screen
Also see:
''' [[Back and forward or other toolbar buttons are missing]]'''
'''[[Navigation Toolbar items]]'''
'''[http://support.mozilla.com/en-US/kb/How+to+customize+the+toolbar How to customize the toolbar]'''
'''''Other Issues''''': ~~red:You have installed plug-ins with known security issues. You should update them immediately.~~
'''Update Java''': your ver. 1.6.0.18; current ver. 1.6.0.20 (important security update 04-15-2010)
(Firefox 3.6 and above requires Java 1.6.0.10 or higher; see: http://support.mozilla.com/en-US/kb/Java-related+issues#Java_does_not_work_in_Firefox_3_6 )
''(Windows users: Do the manual update; very easy.)''
~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/
See: '''[http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates Updating Java]'''
Do the update with Firefox closed.
'''NOTE:''' Java version 1.6.0.21 has been released. It is mainly an update for developers of Java applications and most users do not need to be concerned about downloading version 1.6.0.21. '''''At this time''''', the update option in existing installations of Java 1.6.0.20 are not updating to version 1.6.0.21; '''''at this time''''', it must be manually downloaded and installed. According to the Java release notes:
''"'''Bug Fixes'''''
''Java SE 6 Update 21 does not contain any additional fixes for security vulnerabilities to its previous release, Java SE 6 Update 20. Users who have Java SE 6 Update 20 have the latest security fixes and do not need to upgrade to this release to be current on security fixes."'' Source: http://java.sun.com/javase/6/webnotes/6u21.html
'''Install/Update Adobe Flash Player for Firefox (aka Shockwave Flash)''': your ver. 10.0 r45; current ver. 10.1 r53 ('''important security update 2010-06-10'''; see: http://www.adobe.com/support/security/bulletins/apsb10-14.html)
~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/
See: '''[http://support.mozilla.com/en-US/kb/Managing+the+Flash+plugin#Updating_Flash Updating Flash]'''
-'''use Firefox to download''' and '''SAVE to your hard drive''' (save to Desktop for easy access)
-exit Firefox (File > Exit)
-''In Windows,'' check to see that Firefox is completely closed (''Ctrl+Alt+Del, choose Task Manager, click Processes tab, if "firefox.exe" is on the list, right-click "firefox.exe" and choose End process, close the Task Manager window'')
-''In Windows,'' double-click on the Adobe Flash installer you just downloaded to install/update Adobe Flash
-when the Flash installation is complete, start Firefox, and test the Flash installation here: http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_15507&sliceId=1
*'''NOTE: On Vista and Windows 7''' you may need to run the plugin installer as Administrator by starting the installer via the right-click context menu if you do not get an UAC prompt to ask for permission to continue (i.e nothing seems to happen). See this: http://vistasupport.mvps.org/run_as_administrator.htm
*'''NOTE for IE:''' Firefox and most other browsers use a Plugin. IE uses an ActiveX version of Flash. To install/update the IE ActiveX Adobe Flash Player, same instructions as above, except use IE to download the ActiveX Flash installer. See: [[ActiveX]]
*Also see: http://kb.mozillazine.org/Flash ~~red:'''''AND'''''~~ [[How do I edit options to add Adobe to the list of allowed sites]]
'''You '''~~red:'''MAY'''~~''' need to Update Adobe Reader for Firefox (aka Adobe PDF Plug-In For Firefox)''': your ver. N/A; current ver. 9.3.3 (important security update release 06-29-2010; see: http://www.adobe.com/support/security/bulletins/apsb10-15.html)
~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/
See: http://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox#Installing_and_updating_Adobe_Reader
''You may be able to update from the Adobe Reader installed on your system'' instead of going to the Adobe site and downloading. Open the Adobe Reader installed on your system (''in Windows, Start > Program Files, find and click Adobe Reader to open''), click Help, click Check for Updates. Allow the download/update to occur. If you use this method, no need to proceed with the instructions below, '''but''' do look at the two bulleted items at the bottom "'''NOTE for IE:'''" and "Also see:". Restart Firefox and check your new version here: http://www.mozilla.com/en-US/plugincheck/
''If you go to the Adobe site to download the current Adobe Reader:''
-'''use Firefox to download''' and '''SAVE to your hard drive''' (save to Desktop for easy access)
~~red:-See the images at the bottom left of this post to see the steps to take on the Adobe site~~
-exit Firefox (File > Exit)
-In Windows: check to see that Firefox is completely closed (''Ctrl+Alt+Del, choose Task Manager, click Processes tab, if "firefox.exe" is on the list, right-click "firefox.exe" and choose End process, close the Task Manager window'')
-In Windows: double-click on the Adobe Reader installer you just downloaded to install/update Adobe Reader
*'''NOTE: On Vista and Windows 7''' you may need to run the plugin installer as Administrator by starting the installer via the right-click context menu if you do not get an UAC prompt to ask for permission to continue (i.e nothing seems to happen). See this: http://vistasupport.mvps.org/run_as_administrator.htm
*'''NOTE for IE:''' Firefox and most other browsers use a Plugin. IE uses an ActiveX version. To install/update the IE ActiveX version, same instructions as above, except use IE to download the ActiveX installer. See: [[ActiveX]]
*Also see: http://kb.mozillazine.org/Adobe_Reader ~~red:'''''AND'''''~~ [[How do I edit options to add Adobe to the list of allowed sites]]

Trying to start in safe mode, but....

Have a bad hard drive and trying to start in safe mode but the circle just keeps spinning, been over an hour. Any help to get it to start so I can offload content?

Brilaneb wrote:
Will I lose these using Disk Utility?
Hopefully not, but if the HD is dying it's possible that trying to fix it may have the opposite result.
Do you have another Mac you could connect it to? If so, you may be able to boot into Target Disk mode in the hope that you can copy off the data you don't want to lose before trying to fix the HD:
https://support.apple.com/kb/PH10725

Trying to start in safe mode but keep getting a panic advisor

Trying to start in safe mode but keep getting a panic advisor? Any idea why I cannot start in safe mode?

Hi garfire1,
Do you have an external disk with a Time Machine backup on it?
If you do, try to boot to the Recovery Partition of the TM disk.
- During a boot press the Option key after the chime but before you see a grey screen and then select the TM disk
- If you boot to this Recovery Partition, you have options to run Disk Utility to try and Repair/Repair Permissions of the internal disk or you can select to restore from the TM Backup.
Cheers

Yosemite won't install on my computer because the disk needs to be repaired. I verify, it indicates repair is needed but then the repair disk button can't be clicked. I tried to start in safe mode but it just froze.

I'm to install Yosemite but it tells me the disk need to be repaired. When I verify the repair disk button remains pale and in-clickable. I'm not sure which version of OS X I'm running but I do know I forgot to back up. Help me o-message board, you're my only hope!

Welcome to Apple Support Communities
First of all, open the Apple menu -> About this Mac, and tell us what OS X version you have.
If it is 10.6.x, you need the Snow Leopard DVD. Insert it, press the C key while your Mac is starting up, choose your language and go to Utilities menu (in the menu bar) -> Disk Utility.
If it is 10.7.x or higher, hold down Command and R keys while your Mac is starting up to boot up in OS X Recovery, and open Disk Utility.
After opening Disk Utility, choose your OS X partition in the sidebar (it is usually named "Macintosh HD") and press "Repair Disk". When it has finished, restart your Mac, make a backup of your files and try upgrading to OS X Yosemite.
The backup will help you in case you decide to go back to the OS X version you are using now. If you cannot make a backup and the disk repair does not work, you will have to format the hard disk.

Firefox installed the latest version. Now my google browser, history etc. doesn't work anymore. It doesn't respond. I can't run searches from the browser. youtube button is missing. I've tried opening firefox in safe mode but that doesn't work.

# Question
firefox installed automatically the latest version. Now my google browser, history etc. doesn't work anymore. It doesn't respond. I can't run searches from the browser. youtube button is missing. I've tried opening firefox in safe mode but that doesn't work

A possible cause is a problem with the file places.sqlite that stores the bookmarks and the history.
*http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
What happens if you open Firefox in Save mode?
*https://support.mozilla.com/kb/Safe+Mode
*Help > Restart with Add-ons Disabled

Won't boot up to desktop....apple logo spin keeps on going om gray screen. Tried to start in safe mode and it reverted back to same.

My 4 year old macbook won't boot up. Stays in the same mode . Gray screen, apple logo and spinning wheel. Tried booting in safe mode but reverts back to same. Also tried resetting by removing battery. Nothing is working!! Any advise before I take it to Apple?

Try this:
Reinstall OS X without erasing the drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.
Or, if you have Lion or Mountain Lion:
Reinstalling Lion/Mountain Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

I keep getting the message itunes has stopped working I can't even open itunes I have tried uninstalling and installing, starting in safe mode but nothing seems to work. Please can anyone help me

I have recently bought a new laptop with windows 7 and when i have tried to install and open itunes i keep getting the message 'itunes has stopped working' itunes then shuts down before i can do anything to fix it. This happens every time I try to open itunes. I have tried uninstalling itunes and reinstalling it, starting itunes in safe mode. Nothing seems to work. Please can anyone help.

If and when I finally manage to open it, as soon as I click on a movie to watch, the message "itunes has stopped working" comes up.
Try the following user tip with that one:
iTunes for Windows 10.7.0.21: "iTunes has stopped working" error messages when playing videos, video podcasts, movies and TV shows

After power cut, iMac will only start in safe mode.

When starting up the grey progress bar gets about one third of the way across and eventually switches to a blank grey screen The cursor is visible. It never progresses to the normal desk top.
It does start up in safe mode and shows the normal Yosemite desktop.
iMac is mid 2007 running Yosemite. 2.4 Ghz Intel Core 2 Duo, 4GB 667 MHz DDR@ SDRAM, ATI Radeon HD 2600 Pro 256 MB graphics.

1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. But with the aid of the test results, the solution may take a few minutes, instead of hours or days.
Don't be put off by the complexity of these instructions. The process is much less complicated than the description. You do harder tasks with the computer all the time.
2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. Backup is always a must, and when you're having any kind of trouble with the computer, you may be at higher than usual risk of losing data, whether you follow these instructions or not.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
3. Below are instructions to run a UNIX shell script, a type of program. As I wrote above, it changes nothing. It doesn't send or receive any data on the network. All it does is to generate a human-readable report on the state of the computer. That report goes nowhere unless you choose to share it. If you prefer, you can act on it yourself without disclosing the contents to me or anyone else.
You should be wondering whether you can believe me, and whether it's safe to run a program at the behest of a stranger. In general, no, it's not safe and I don't encourage it.
In this case, however, there are a couple of ways for you to decide whether the program is safe without having to trust me. First, you can read it. Unlike an application that you download and click to run, it's transparent, so anyone with the necessary skill can verify what it does.
You may not be able to understand the script yourself. But variations of it have been posted on this website thousands of times over a period of years. The site is hosted by Apple, which does not allow it to be used to distribute harmful software. Any one of the millions of registered users could have read the script and raised the alarm if it was harmful. Then I would not be here now and you would not be reading this message.
Nevertheless, if you can't satisfy yourself that these instructions are safe, don't follow them. Ask for other options.
4. Here's a summary of what you need to do, if you choose to proceed:
☞ Copy a line of text in this window to the Clipboard.
☞ Paste into the window of another application.
☞ Wait for the test to run. It usually takes a few minutes.
☞ Paste the results, which will have been copied automatically, back into a reply on this page.
The sequence is: copy, paste, wait, paste again. You don't need to copy a second time. Details follow.
5. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode, under the conditions in which the problem is reproduced. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
6. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply. Don't log in as root.
7. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in the browser window, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
Triple-click anywhere in the line of text below on this page to select it:
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec;clear;cd;p=(Software Hardware Memory Diagnostics Power FireWire Thunderbolt USB Bluetooth SerialATA Fonts 1000 25 5120 KiB/s 1024 85 \\b%% 20480 1 MB/s 25000 ports ' \*dropbox \*genieo\* \*GoogleDr\* \*k.AutoCAD\* \*k.Maya\* vidinst\* ' DYLD_INSERT_LIBRARIES\ DYLD_LIBRARY_PATH -86 "` route -n get default|awk '/e:/{print $2}' `" 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB 'com.adobe.AAM.Updater-1.0 com.adobe.AAM.Updater-1.0 com.adobe.AdobeCreativeCloud com.adobe.CS4ServiceManager com.adobe.CS5ServiceManager com.adobe.fpsaud com.adobe.SwitchBoard com.adobe.SwitchBoard com.apple.aelwriter com.apple.AirPortBaseStationAgent com.apple.FolderActions.enabled com.apple.installer.osmessagetracing com.apple.mrt.uiagent com.apple.ReportCrash.Self com.apple.rpmuxd com.apple.SafariNotificationAgent com.apple.usbmuxd com.citrixonline.GoToMeeting.G2MUpdate com.google.keystone.agent com.google.keystone.daemon com.microsoft.office.licensing.helper com.oracle.java.Helper-Tool com.oracle.java.JavaUpdateHelper com.oracle.java.JavaUpdateHelper org.macosforge.xquartz.privileged_startx org.macosforge.xquartz.privileged_startx org.macosforge.xquartz.startx' '879294308 4071182229 461455494 3627668074 1083382502 1274181950 1855907737 2758863019 1848501757 464843899 3694147963 1233118628 2456546649 2806998573 2778718105 2636415542 842973933 2051385900 3301885676 891055588 998894468 695903914 1443423563 4136085286 523110921 2883943871 3873345487' 51 5120 files 4 );N5=${#p[@]};p[N5]=` networksetup -listnetworkserviceorder|awk ' NR>1 { sub(/^$[0-9]+$ /,"");n=$0;getline;} $NF=="'${p[26]}')" { sub(/.$/,"",$NF);print n;exit;} ' `;f=('\n%s: %s\n' '\n%s\n\n%s\n' '\nRAM details\n%s\n' %s\ %s '%s\n-\t%s\n' );S0() { echo ' { q=$NF+0;$NF="";u=$(NF-1);$(NF-1)="";gsub(/^ +| +$/,"");if(q>='${p[$1]}') printf("%s (UID %s) is using %s '${p[$2]}'",$0,u,q);} ';};s=(' s/[0-9A-Za-z._]+@[0-9A-Za-z.]+\.[0-9A-Za-z]{2,4}/EMAIL/g;/faceb/s/(at\.)[^.]+/\1NAME/g;/\/Shared/!s/(\/Users\/)[^ /]+/\1USER/g;s/[-0-9A-Fa-f]{22,}/UUID/g;' ' s/^ +//;/de: S|[nst]:/p;' ' {sub(/^ +/,"")};/er:/;/y:/&&$2<'${p[46]} ' 1s/://;3,6d;/[my].+:/d;s/^ {4}//;H;${ g;s/\n$//;/s: (E[^m]|[^EO])|x([^08]|02[^F]|8[^0])/p;} ' ' 5h;6{ H;g;/P/!p;} ' ' ($1~/^Cy/&&$3>'${p[11]}')||($1~/^Cond/&&$2!~/^N/) ' ' /:$/{ N;/:.+:/d;s/ *://;b0'$'\n'' };/^ *(V.+ [0N]|Man).+ /{ s/ 0x.... //;s/[()]//g;s/(.+: )(.+)/ (\2)/;H;};$b0'$'\n'' d;:0'$'\n'' x;s/\n\n//;/Apple[ ,]|Genesy|Intel|SMSC/d;s/\n.*//;/\)$/p;' ' s/^.*C/C/;H;${ g;/No th|pms/!p;} ' '/= [^GO]/p' '{$1=""};1' ' /Of/!{ s/^.+is |\.//g;p;} ' ' $0&&!/ / { n++;print;} END { if(n<10) print "com.apple.";} ' ' { sub(/ :/,"");print|"tail -n'${p[12]}'";} ' ' NR==2&&$4<='${p[13]}' { print $4;} ' ' END { $2/=256;if($2>='${p[15]}') print int($2) } ' ' NR!=13{next};{sub(/[+-]$/,"",$NF)};'"`S0 21 22`" 'NR!=2{next}'"`S0 37 17`" ' NR!=5||$8!~/[RW]/{next};{ $(NF-1)=$1;$NF=int($NF/10000000);for(i=1;i<=3;i++){$i="";$(NF-1-i)="";};};'"`S0 19 20`" 's:^:/:p' '/\.kext\/(Contents\/)?Info\.plist$/p' 's/^.{52}(.+) <.+/\1/p' ' /Launch[AD].+\.plist$/ { n++;print;} END { if(n<200) print "/System/";} ' '/\.xpc\/(Contents\/)?Info\.plist$/p' ' NR>1&&!/0x|\.[0-9]+$|com\.apple\.launchctl\.(Aqua|Background|System)$/ { print $3;} ' ' /\.(framew|lproj)|\):/d;/plist:|:.+(Mach|scrip)/s/:.+//p ' '/^root$/p' ' !/^\/[AD]|\/Contents\/.+\/Contents\//&&/\/(Lib|usr).+\/(.+\.framework|Contents|Info\.plist|Resources|Versions)$/ { n++;sub(/\/Info\.plist$/,"");sub(/\/(Content|Resource|Version)s(\/.+)?/,"");print|"sort|uniq";} END { if(n<1100) print "/System/";} ' '/\.dylib$/p' ' /Temp|emac/{next};/(etc|Preferences|Launch[AD].+)\// { sub(".(/private)?","");n++;print;} END { split("'"${p[41]}"'",b);split("'"${p[42]}"'",c);for(i in b) print b[i]".plist\t"c[i];if(n<500) print "Launch";} ' ' /^\/[AD]/d;p;' 's/Pr.+n //p' ' { gsub("^| |\n","\\|\\|kMDItem'${p[35]}'=");sub("^...."," ") };1 ' p '{print $3"\t"$1}' 's/\'$'\t''.+//p' 's/1/On/p' '/Prox.+: [^0]/p' '$2>'${p[43]}'{$2=$2-1;print}' ' BEGIN { i="'${p[26]}'";M1='${p[16]}';M2='${p[18]}';M3='${p[31]}';M4='${p[32]}';} !/^A/{next};/%/ { getline;if($5<M1) a="user "$2"%, system "$4"%";} /disk0/&&$4>M2 { b=$3" ops/s, "$4" blocks/s";} $2==i { if(c) { d=$3+$4+$5+$6;next;};if($4>M3||$6>M4) c=int($4/1024)" in, "int($6/1024)" out";} END { if(a) print "CPU: "a;if(b) print "I/O: "b;if(c) print "Net: "c" (KiB/s)";if(d) print "Net errors: "d" packets/s";} ' ' /r\[0\] /&&$NF!~/^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./ { print $NF;exit;} ' ' !/^T/ { printf "(static)";exit;} ' '/apsd|BKAg|OpenD/!s/:.+//p' ' (/k:/&& $3!~/(255\.){3}0/)||(/v6:/&&$2!~/A/) ' ' $1~"lR"&&$2<='${p[25]}';$1~"li"&&$3!~"wpa2";' ' BEGIN { FS=":";p="uniq -c|sed -E '"'s/ +\$[0-9]+\$\$.+\$/\\\2 x\\\1/;s/x1$//'"'";} { n=split($3,a,".");sub(/_2[01].+/,"",$3);print $2" "$3" "a[n]$1|p;b=b$1;} END { close(p);if(b) print("\n\t* Code injection");} ' ' NR!=4{next} {$NF/=10240} '"`S0 27 14`" ' END { if($3~/[0-9]/)print$3;} ' ' BEGIN { L='${p[36]}';} !/^[[:space:]]*(#.*)?$/ { l++;if(l<=L) f=f"\n "$0;} END { F=FILENAME;if(!F) exit;if(!f) f="\n [N/A]";"cksum "F|getline C;split(C, A);C="checksum "A[1];"file -b "F|getline T;if(T~/^Apple b/) { f="";l=0;while("PlistBuddy -c Print "F|getline g) { l++;if(l<=L) f=f"\n "g;};};if(T!~/^(AS.+ (En.+ )?text(, with v.+)?$|(Bo|PO).+ sh.+ text ex|XM)/) F=F" ("T", "C")";else F=F" ("C")";printf("\nContents of %s\n%s\n",F,f);if(l>L) printf("\n ...and %s more line(s)\n",l-L);} ' ' s/^ ?n...://p;s/^ ?p...:/-'$'\t''/p;' 's/0/Off/p' ' END{print NR} ' ' /id: N|te: Y/{i++} END{print i} ' ' / / { print "'"${p[28]}"'";exit;};1;' '/ en/!s/\.//p' ' NR!=13{next};{sub(/[+-M]$/,"",$NF)};'"`S0 39 40`" ' $10~/$L/&&$9!~"localhost" { sub(/.+:/,"",$9);print $1": "$9|"sort|uniq";} ' '/^ +r/s/.+"(.+)".+/\1/p' 's/(.+\.wdgt)\/(Contents\/)?Info\.plist$/\1/p' 's/^.+\/(.+)\.wdgt$/\1/p' ' /l: /{ /DVD/d;s/.+: //;b0'$'\n'' };/s: /{ /V/d;s/^ */- /;H;};$b0'$'\n'' d;:0'$'\n'' x;/APPLE [^:]+$/d;p;' ' /^find: /d;p;' "`S0 44 45`" ' BEGIN{FS="= "} /Path/{print $2} ' ' /^ *$/d;s/^ */ /;' ' s/^.+ |\(.+$$//g;p ' '/\.(appex|pluginkit)\/Contents\/Info\.plist$/p' ' /2/{print "WARN"};/4/{print "CRITICAL"};' ' /EVHF|MACR|^s/d;s/^.+: //p;' ' $3~/^[1-9][0-9]{0,2}(\.[1-9][0-9]{0,2}){2}$/ { i++;n=n"\n"$1"\t"$3;} END { if(i>1) print n;} ' ' s/:[^:]+$//;s/ +([0-9]+)(.+)/\2 x\1/p;' ' { gsub(/[()"]/,"",$3);if(!$3) $3="N/A";print $3;} ' ' 1,/$P/d;/e: Pe/{ n;s/^.+://;b0'$'\n'' };/^ +Man.+: ./{ s/ \(0x.+$//;s/[()]//g;s/(.+: )(.+)/ (\2)/;H;};$b0'$'\n'' d;:0'$'\n'' x;s/\n//;p;' );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps crontab iotop top pkgutil 'PlistBuddy 2>&1 -c "Print' whoami cksum kextstat launchctl smcDiagnose sysctl\ -n defaults\ read stat lsbom 'mdfind -onlyin /' ' for i in ${p[24]};do ${c1[18]} ${c2[27]} $i;done;' pluginkit scutil dtrace profiles sed\ -En awk /S*/*/P*/*/*/C*/*/airport networksetup mdutil lsof test osascript\ -e netstat mdls );S1() { printf kMDItemContentTypeTree=com.apple.$1'|sort';};S2() { printf 'L*/Ca*/com.ap*.Saf*/E*/* -d 1 -name In*t -exec '"${c1[14]}"' :'$1'" {} \;|uniq';};c2=(com.apple.loginwindow\ LoginHook '" /L*/P*/loginw*' "'tell app \"System Events\" to get properties of login items'|tr , \\\n" "`S2 CFBundleDisplayName`" '~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $' '-F \$Message -k Sender kernel -k Message CSeq "I/O e"|sort|uniq -c' :${p[35]}\" :Label\" '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status " -F '\$Time \$(RefProc): \$Message' -k Sender Req 'fsev|kern|launchd' -k RefProc Rne 'Aq|WebK' -k Message Rne '08012|Goog|ksadm|probe|Roame|SMC:|smcD|sserti|suhel| VALI|ver-r|xpma' -k Message Req 'abn|bad |Beac|caug|corru|dead[^bl]|FAIL|fail|GPU |hfs: Ru|idle ex|inval|jnl:|last value [1-9]|NVDA$|pagin|pci pa|proc: t|Roamed|rror|SL|TCON|Throttli|tim(ed? ?|ing )o|WARN' " '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/r*/com.apple.*.{BS,Bas,Es,J,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cght] ! -name .?\* ! -name \*ag \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true $ -execdir stat -f:%Sc:%N -t%F {} \;|sort -t: -k2 |tail -n'${p[38]} '/S*/*/Ca*/*xpc* >&- ||echo No' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' "`S1 bundle`" "`S1 mach-o-dylib`" `awk "${s[31]}"<<<${p[23]}` "/e*/{auto,{cron,fs}tab,hosts,{[lp],sy}*.conf,mach_i*/*,pam.d/*,ssh{,d}_config,*.local} {,/usr/local}/etc/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}*t {/S*/,/,}L*/Lau*/*t .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers\ "${p[N5]}" -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' '+c0 -i4TCP:0-1023' com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' '-app Safari WebKitDNSPrefetchingEnabled' "+c0 -l|awk '{print(\$1,\$3)}'|sort|uniq -c|sort -n|tail -1|awk '{print(\$2,\$3,\$1)}'" -m 'L*/{Con*/*/Data/L*/,}Pref* -type f -size 0c -name *.plist.???????|wc -l' kern.memorystatus_vm_pressure_level '3>&1 >&- 2>&3' " -F '\$Time \$Message' -k Sender kernel -k Message CSeq 'n Cause: -' " -i '-app Safari UserStyleSheetEnabled' -name\ kMDItem${p[35]} "`S2 ${p[35]}`" );N1=${#c2[@]};for j in {0..10};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files I/O\ errors 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents XPC\ cache Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching SATA Descriptors App\ extensions Lockfiles Memory\ pressure SMC Shutdowns Nets Stylesheet );N3=${#l[@]};for i in {0..3};do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};A'$((7+i))'() { v=` eval sudo "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};';done;A9(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0() { [[ "$v" ]]&&sed -E "$s"<<<"$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v"|sed -E "$s";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "${s[63]}"<<<"$v"`&&C1 1 $1;};for i in 1 2 7 8;do for j in 0 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;D20 0 $((N1+1)) 2;D10 0 $N1 1;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;D13 0 $((N1+9)) 59 50;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 0 $((N1+8)) 71 $((N3+3));D13 1 10 7 9;D13 1 11 8 10;B1&&D73 19 53 67 55;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D13 5 5 69 1;D13 5 54 30 56;D23 5 14 12 14;D22 6 36 13 15;D22 20 52 66 54;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D82 35 49 61 51;D82 11 17 17 20;for i in 0 1;do D82 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A8 18 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 24 22 29;B7 12;B2 14;A4 39 57 70 14;B2 15;B6 14 15 4;C3 29;A1 24 23 32;B7 13;C3 30;B3 4 0 65;A3 14 6 32 0;B4 0 16 11;A1 26 50 64;B7 16;C3 52;D13 24 24 32 31;D13 25 37 32 33;A2 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D73 21 0 32 19;D73 10 42 32 40;D82 29 35 46 39;};D23 14 1 62 42;D12 34 43 53 44;D12 22 20 32 25;D22 0 $((N1+10)) 51 32;D13 4 8 41 6;D12 21 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 38 55 68 57;D23 33 34 42 37;B1&&D83 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 10 42 32 41;D13 37 2 48 43;A1 4 3 60;B2 30;A1 4 58 60;B2 31;B6 30 31 4;C3 5;D12 21 56 35 58;D12 21 48 49 49;B3 4 22 57;A1 21 46 56;B7 22;B3 0 0 58;C3 47;D22 4 4 50 0;D12 4 51 32 53;D23 22 9 37 7;A9;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
8. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
9. If you see an error message in the Terminal window such as "Syntax error" or "Event not found," enter
exec bash
and press return. Then paste the script again.
10. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, press the key combination control-C or just press return three times at the password prompt. Again, the script will still run.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
11. The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line
[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report what happened. No harm will be done.
12. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with the words "Start time." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
13. When you post the results, you might see an error message on the web page: "You have included content in your post that is not permitted," or "You are not authorized to post." That's a bug in the forum software. Please post the test results on Pastebin, then post a link here to the page you created.
14. This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

Tried to start in safe mode - now nothing

I am using a Satellite A305-S6825. I have been unable to do updates since April and have been working with Microsoft Support to solve that problem. He suggested I start the laptop in Safe mode and do a virus scan. I did a reboot and hit F12 - the boot menu came up but I was unable to navigate through it or make any choices. I hit enter and the PC booted. I tried a second time; this time when I hit F12 everything went black. Now all I get is a small solid white line in the upper left corner (like a non-blinking cursor). I've tried using the Restore disk but nothing happens. I can't type anything onto the screen and hitting F2 also makes no difference. Any suggestions?

Hi, you said you tried using the restore disk? Did it gave you any error message? When you put the restore dsik and tried doing f12 to access the boot menu, did it went there? What do you mean "nothing happened"? Can you be more specific on that part? Give more details please...

TS4284 iMac won't start ... Disk0s2: I/O error when starting in safe mode

My iMac started lagging badly with a color wheels spinning round and round, so I rebooted and now it won't startup at all.
All I get is a white/grey screen with the Apple logo and a spinning wheel, but no joy in starting up.
I managed to start in safe mode, but it stopped at the following:
disk0s2: I/O error.
0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 1544944] [LBlkNum 3758] [FSLogMsgId 1702152349] [FSLogMsgOrder First]
0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode root_device] [MountPt /] [FSLogMsgId 1702152349] [FSLogMsgOrder Last]
Don't understand a word of this, but would appreciate any guidance as to what to do? Is it time to take it in to the Apple Store or do I just dump the machine and get a new one?
I wonder if this is not caused by any updates? Would that be possible?

FunkyJazzMuso wrote:
Could the drive be taken out and accessed via a ISB cable so I can at least rescue my iPhone and iPad info?
Without any problem. Just extract the hard drive, buy an enclosure to put the hard drive and connect it to your new computer after setting it up, so you will be able to transfer all your data onto the new Mac. You can find some enclosures in OWC > http://eshop.macsales.com/shop/hard-drives/External-Enclosures/

Have an old mac mini 2008 running OS x 10.6 whenever I shut down or restart it wont find the dell screen again. have tried with different screen same result. have revived it before by unplugging all cables zapping PRAM and starting in safe mode

Have an old mac mini 2008 running OS x 10.6 Whenever I shut down or restart it won't find the dell screen again. Have tried with different screen same result. Have revived it before by unplugging all cables zapping PRAM and starting in safe mode but no luck now. It has all my daughters exam work on it which she, of course, has not backed up so any suggestions gratefully received.

Make an appointment at the Genius Bar of an Apple store.
Apple Retail Store - Genius Bar
You do have a backup, right?

MacBook Pro won't boot - tried safe mode but it went to black screen after trying.

my MacBook Pro froze after the fan was running very loudly. I turned it off and try to reboot but just got a gray screen. I tried to boot in safe mode but that did not work.any other thoughts on what might help?

Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Reinstalling OS X Without Erasing the Drive
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility and press the Continue button. After Disk Utility loads select the Macintosh HD entry from the the left side list. Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit Disk Utility and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Alternatively, see:
Reinstall OS X Without Erasing the Drive
Choose the version you have installed now:
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

IMac won't boot into safe mode

Hello. I hope this is the right forum.
I have an iMac (2010 ish) that recently encountered system slugishness and then eventually would not start. All we got was the white screen, the apple logo, the spinning gear and the progress bar. It is currently stuck on the white screen with the aple logo and the spinning gear after trying to start in safe mode. Do any of you kind folk have some suggestions on what to do next? Thanks in advance.

Thank you for your reply. I have just attempted an AHT where I followed the instructions for OSX 10.7 and above. I chose this, even though I have the 10.6.4 Install disk because we upgraded this computer to 10.7. The machine did not do the test. It just repeated the same behaviour as before, white screen, apple logo, spinning gear and progress bar for several seconds and then the bar dissapears. Should I have tried the AHT by using the install disk as noted?

IMac tries to start in safe mode but fails.

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