IMac G5 only starts in Safe Boot

iMac G5 ALS, 1 gig ram, OS 10.4.9, fresh formatted drive. Bluetooth v1.6, Airport ex v3.6
Startup gives Apple logo with spinning progress wheel, then solid dark blue screen, then light blue screen with black mouse cursor, then nothing else happens. The only way I can get the imac to startup is to hold down the Shift key on startup to go into Safe Boot, then everything except networking and DVD works, which is what I needed most. I have tried starting up from an external firewire drive with 10.4.7 and I get the same thing. It must be an extension that is accessing bad hardware, but which one? Or maybe my Airport extreme card that is bad, I need help.
Thanks in advance.

Now I am pleasantly confused, I closed it all up and restarted and I was back where I started with a blue screen and a mouse cursor. Then I thought I would give it one last shot and connect up the firewire drive with a system on it, and when I started with the Option key down to select the firewire drive, it came up as normal on that system. I was able to play a DVD movie, run games, and burn a CD from the external firewire system. I used safari wireless to get out on the internet, wow. So I used the system preferences to set the startup disk as the internal hard disk, and restarted, it came up on the internal system with the USB keyboard and mouse. Then I shut it down, turned on the wireless keyboard and mouse, then restarted. I stuck at the blue screen as before. So I turned it off, turned off the wireless keyboard and mouse, connected the USB keyboard and mouse, and the firewire drive, and it stuck again at the blue screen. I think it is time for a long drink, and let both me and the mac cool off. I will let you know what happens when I turn it back on.

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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 $2}' `" 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB 'com.adobe.AAM.Updater-1.0 com.adobe.AAM.Updater-1.0 com.adobe.AdobeCreativeCloud com.adobe.CS4ServiceManager com.adobe.CS5ServiceManager com.adobe.fpsaud com.adobe.SwitchBoard com.adobe.SwitchBoard com.apple.aelwriter com.apple.AirPortBaseStationAgent com.apple.FolderActions.enabled com.apple.installer.osmessagetracing com.apple.mrt.uiagent com.apple.ReportCrash.Self com.apple.rpmuxd com.apple.SafariNotificationAgent com.apple.usbmuxd com.citrixonline.GoToMeeting.G2MUpdate com.google.keystone.agent com.google.keystone.daemon 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process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents XPC\ cache Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching SATA Descriptors App\ extensions Lockfiles Memory\ pressure SMC Shutdowns Nets Stylesheet );N3=${#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]}' 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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.

My iMac will "ONLY" run in "safe boot" mode

Hardly anything works .. No sound .. wont recognize ANY USB pluggin .. iPad .. cd's or DVD's
Has several sets of Green vertical lines ( 8 lines in each set ) on screen backround

What happens when you try to boot normally?
What model Mac do you have. The model type can be found in the System Information.
It sounds like it might be a graphic card issue. If you're running Lion or later Boot into the Recovery volume (boot with the Command + R keys held down), select Disk Utility and repair both disk and disk permissions. Then try to reboot normally.

IMac powers down while starting in safe boot mode

My 2014 21" iMac powers itself down after about 10 seconds while trying to startup in safe boot mode. I'm not even sure why it is trying to start in safe boot mode. I shut it down after a power outage while plugged into an APS UPS. I'm guessing that since I interrupted the auto shutdown it is restarting in safe boot mode. Either way, I get a grey screen with a big apple and a progress bar. The progress bar gets to about a tenth full and the power just shuts off.
I've tried starting up while holding the alt key to select the Macintosh HD. The same thing happens.
I'm not particularly tech savvy. Any ideas are appreciated.

Thank you for the clarification and link. I ran the disk utility on Macintosh HD and it said it can't repair the disk, and that I need to reformat and restore. It has an invalid node structure. All of this happened just because I shut it down presumable while it was already trying to shut itself down after talking to the UPS?
At least I use Time Machine.
Thank you again.

My Mac Book pro recently started in safe boot mode and ever since I have had endless problems - To start with the keyboard will only input capitals and symbols althougth no locks are on and now I have a green wave on all white backgrounds! HELP!

My Mac Book pro recently started in safe boot mode and ever since I have had endless problems - To start with the keyboard will only input capitals and symbols althougth no locks are on and now I have a green wave on all white backgrounds! HELP!

Hi it's puzzled of Evesham....I didn't ask the question but have experienced exactly the same. I switched the computer on and it went straight to safe mode

Only starting in safe mode

Hi there
I have an imac 8.1 that will only start in safe mode.When it does start it runs very slowly and I can't see a mouse pointer, so navigating around is a bit of an issue.
I have reset the all the PRAM and the like, I have even swapped out the hard drive thinking that was the issue. So with a totally new install I am still getting the issue (so my mind is thinking some hardware isn't playing nicely). The problem initially happened after I had updated to Maverick, but it is still continuing on Snow Lepord and Mountain Lion when I have installed those as well. I can't get to install Maverick as it doesn't want to install while in safe mode.
I have got to the log files and managed to see a number of panic listed (as you can imagine getting them up on screen is an effort with no mouse). The main panic seems to be over:
Kernal Extensions in backtrace:
     com.apple.GeForce(8.1)[<<some GUID>>]@<<some memory reference>>
     dependancy: com.apple.NVDAResman(8.1.0)[<<some GUID>>]@<<some memory reference>>
     dependancy: com.apple.iokit.IONDRVSupport(2.3.7)[<<some GUID>>]@<<some memory reference>>
     dependancy: com.apple.iokit.IOPCIFamily(2.7.3)[<<some GUID>>]@<<some memory reference>>
     dependancy: com.apple.iokit.IOGraphicsFamily(2.3.7)[<<some GUID>>]@<<some memory reference>>
BSD process name corresponding to current thread: WindowServer
Mac OS version
12D78
Etc etc etc
last loaded kext at:<<number>> com.apple.driver.AppleHWSensor 1.9.5d0
So my thinking is it's the 8800GS graphics card at fault in some way. I have read a few horror stories, but I don't think I am having the same issue as it is powering up fine in safe mode at a high resolution (if a bit flickery).
Any ideas?
Cheers in advance
Garf

I have it working now.
I found the following
Issue: System stops on Kernel Panic during boot.
Solution:This is caused by the GeForce Kexts that are installed by default. The issue is resolved by removing the GeForce kexts at boot, and it can be done as followed:
rm -rf /System/Library/Extensions/GeForce.kext
rm -rf /System/Library/Extensions/Ge*.kext
rm -rf /System/Library/Extensions/NV*kext
And it seems to be "Ok" has a bit of a shout when I first came back in

Macbook constantly starting in Safe Boot

Macbook Pro, External display (Samsung sync master t22b350) Apple Wireless Keyboard, Usb wired mouse, genuine Apple HDMI cable.
Macbook pro constantly starting in safe boot until rebooted. tried a reinstall of everything fresh with it happening more frequently. Any ideas?
Only other peripherals are wireless printer and apple TV so dont think anything is conflicting.

First, reset the PRAM > http://support.apple.com/kb/HT1379 This will reset boot parameters to default settings, so OS X should start into normal mode after resetting the PRAM.
If it doesn't work, open Terminal and type:
sudo nvram -d boot-args

HELP!! My player only starts in safe mode and won't do anything!

<FONT face="Comic Sans MS" size=3>I dropped my nomad zen xtra (which i have to say has happened before), but this time it locked up - i couldn't shut it down or do anything else. Now when I start it, it only starts in safe mode, but it won't do anything in safe mode. It tells me "hard disk problems". It won't allow me to reformat even. What do I do?

Sounds like the player is broken. You can either return it to Creative for a paid repair, or try and fix it yourself by replacing the hard dri've (assuming that's what's broken). There's a guide here on hard disk replacement, but it's not for the faint hearted

I downloaded a adobe flash update and my computer and after next logon got a blue screen. could only start in safe mode and until uninstalling the flash player could i safe mode with networking. i cannot open any microsoft products now. I get a message

i downloaded an adobe flash update and my computer after next logon got a blue screen. I could only start in safe mode and until uninstalling the flash player could i start in safe mode with networking. i cannot open any microsoft products now. I get a message saying adobe acrobat 10 is not designed to run on windows or uninstall and reinstall it ....but it will not let me uninstall it. What do i do? is this all an adobe issue or a windows problem?? thanks Tim

Hate to suggest this, but you need to ask in the Flash forum. This forum is for Acrobat.

My mac book air keeps starting in safe boot mode. I cant enter my password as it is caps lock so i cant access my computer. Please can someone please help me start back in normal mode? Thank you

MY Macbook air keeps starting in "safe boot" mode, no idea why. I cannot get into the system because this mode makes everything write in capital letters and my password is in lower case. I keep turning it off and on but nothing changes and i cannot access my computer. Please can someone help me? Thank you

I'm not getting a clear picture at all of what problems you're seeing. If you are seeing online accounts have their passwords changed, those accounts are being hacked. Someone may already have access to some account and is using that access to reset passwords on other accounts. Change the password on EVERY online account you have. Be sure to use a strong password, and don't use the same password on more than one site.
If you are seeing changes to your bookmarks and browser history, your Apple ID may be one of the accounts that has been hacked. After changing the password on your Apple ID, you need to lock it down with two-factor authentication:
http://support.apple.com/kb/ht5570
Beyond that, we will need additional details about what specific symptoms you're seeing in order to help further. One thing I can say, though, is that these problems are very unlikely to be due to any kind of malware. See my Mac Malware Guide to learn more on that topic.

Macbook pro 2006 can only start on safe mode and it has a lot of squares on the screen

My macbook pro 2006 can only start on safe mode and it has a lot of squares on the screen even if I use an external display help? heres a picture http://i61.tinypic.com/vebszt.jpg

Mespinal130,
have you tried running your MacBook Pro’s Apple Hardware Test, to see if it can detect anything amiss?

Have just installed FireFox and it only starts in 'Safe Mode' ???

I was having problems uploading photos to Photobox... 'They' suggested installing FireFox
I haven't yet put a short cut on the tool bar, so when I click 'start' Firefox is highlighted as a new perog, but it states that it will only start in '(Safe Mode)'

Those disk permissions results are harmless and are irrelevant here.
All external hardware is disconnected when you try this?
Do you have Xcode installed?

Hi i am having a big trouble. MY mac wont start past the gray screen. I tried starting on safe boot, single user user mode , recovery mode. Everything it gets stuck on the gray screen i even tried reinstalling it , same thing what should i do?

MY mac wont start past the gray screen. I tried starting on safe boot, single user user mode , recovery mode. Everything it gets stuck on the gray screen i even tried reinstalling it , same thing what should i do? it lets me reinstall sometimes Sometimes.... it is weird.

orshikhfromsc,
boot from the Mac OS X Install DVD that originally came in the box with your MacBook Pro (by holding down the C key as it starts up). When the desktop appears, select Disk Utility from the Utilities menu and erase your internal disk. After it’s been erased, reformat it. After it’s been reformatted, exit Disk Utility and reïnstall the version of Mac OS X from that DVD onto your internal disk. After that version of Mac OS X has been reïnstalled, boot from your internal disk and run Software Update to get it up-to-date within that version; that should allow you to redownload and reïnstall Mavericks, if desired. If Mavericks is reïnstalled, run Software Update again to get it up to date.
If you no longer have the two grey installation DVDs, you can purchase a replacement set from either Apple or iFixit.

My iMac only starts in safe mode few hours after upgrade to 10.7.3

After I updated to 10.7.3 on my iMac everything looked fine, but after few hours of activity everything except mouse cursor froze in a fullscreen app. No keyboard shortcut was able to force quit the app and only way was to turn the iMac off with power button. After restart login screen appeared and after I logged in the system froze while after the Skype started and I wrote few letters in a chat there. Again only power button worked, but this time I didn't even get the login screen, everything froze on the grey screen.
I searched web on mac book and found info about problems with update and solution via installing comboupdate. I managed to start in safe mode and installed the combo update. After installation system started and all worked fine few hours until screen froze again, the picture gor a bit corrupted (some "empty" squares appeared) and I had to use power button again.
Since that time my only way to get to login screen is safe mode (holding shift after restart), next reinstal of combo update didn't help. New install of lion runs correctly the part of instalation in the safe mode, than it restarts after while computer restarts and installation progress is shown, however the progress freezes nearly imediatelly and nothing happens for next hour.
If I boot from recovery partition it starts after relatively long time the system utility, but even here interaction is wrong as after every click I have to wait few minutes until something happens, so I was not able to really start some action there.
I can only take the iMac to sevis (sadly the 1 year warranty over) on monday so any suggestions what I could try till then to make it working again are very welcome.

So the result form Apple authorized servis was that both motherboard and graphic card need to be replaced (cost aproximatelly 1100$) and in addition they said there will still remain some problem with display which would cost additional 500$ to fix. Taken in account that there would be only 90 days warranty on new parts I decided to give up with the iMac. Very disappointing after only 1,5 year on machine that costed more than 2000$.
Recommendation from me after this experience - buy 3 years warranty if possible. I am personally very much looking forward for Mac Pro refresh. I don't want to be again in situation that if something breaks in my working machine I have no chance to replace it myself and can only expect very high repair costs. Untill new Mac Pros are out I'll suffer working on Mac Book Pro.

IMac starting in safe boot won't accept p/w as stuck on caps?

Hello
My iMac OSX opens at 'safe boot'' screen and requests password. Won't accept password as stuck in caps (I have checked keyboard and it's fine) and my password is not in capitals! Any suggestions would be very gratefully received.
Many thanks

Have you tried a PRAM reset?
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Do you another wired keyboard you could use to see whether the existing keyboard has developed a problem.

IMac G5 only starts in Safe Boot

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