How to Further Diagnose with Safe Mode

Hello,
I am having a Finder crash problem that is corrected with a boot into Safe Mode. At least i am up and running again. However, my problems aren't completely fixed...
So, how can I further use Safe Mode to track down the root of the original problem? Is there some way to see what items were NOT loaded via Safe Mode in comparing before/after actions? Wow, this brings back tortured memories of Conflict Catcher in Mac OS 9 days!
More microchips than sense,
Dr. Z.

If everything works in Safe Mode, then it is likely a third-party extension, login item, or launchAgent/Daemon.
There is nothing like the Extension Manager or Conflict Catcher.
You can see the loaded extensions in System Profiler. It will also list startup items, but not the currently used LaunchAgent and LaunchDaemons.
For those things, look in your Login items in Accounts system prefs, and the LaunchAgents and LaunchDaemons folders in both your user Library and the root /Library. Anything non-apple could be the problem.

Similar Messages

How long should I let Safe Mode startup run? I keep getting the "disk0s2 i/o error" message and I'm just not sure when to give up and try a different method. I already ran disk utility in Recovery Mode and it said there were no repairs needed.

How long should I let Safe Mode startup run? I keep getting the "disk0s2 i/o error" message and I'm just not sure when to give up and try a different method. I already ran disk utility in Recovery Mode and it said there were no repairs needed but it still kept getting stuck on the apple loading screen.

You have limited opportunity to attempt to create a backup of your created files.
That is what the SafeBoot or safemode appears to allow you -- at the moment.
Since the hard disk drive exhibits signs of failure or other major issues, plan
on a replacement in the near future. You may be able to get the computer to
start up in a regular full OS X (not safe mode) but consider its hours are limited.
An externally enclosed hard disk drive (with own power supply, not relying on
Mac ports to run it) is a good basic means of which to use a disk utility to make
a copy or a Clone of the current OS X. This may help retrieve an archive that
could be used along with a Time Machine backup, to restore your Mac once you
get a new hard drive installed inside.
Good luck & happy computing!

I cannot get my add-ons (Just one in appreances) to come back, it says ...All addons have been disabled by safe mode? how do i turn off safe mode?

My add-ons have been disabled, i can enable some but the most important ones will not let me becuase it says All add-ons have been disabled by safe mode? How do i turn off safe mode?

Make sure that you do not press the Shift key if you start Firefox.
It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.com/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.com/kb/Unable+to+install+add-ons
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is a compatibility update available.

Tried to restart with safe mode

Tried to restart with safe mode, but id not work.

What kind of issues do you have that you want to start Firefox in Safe Mode?
Can't you start Firefox at all?
It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
*https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating
There are other things that need your attention.
Note that your System Details List shows multiple Flash plugins.
# Shockwave Flash 13.0 r0
# Shockwave Flash 12.0 r0
You can find the installation path of all plugins on the <b>about:plugins</b> page.
*http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins
You can check the Flash player installation folder for multiple Flash player plugins and remove older version(s) of the plugin (NPSWF32) and possibly (re)install the latest Flash player.
*(32 bit Windows) C:\Windows\System32\Macromed\Flash\
*(64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\

My mac book air restart with safe mod

Hi
I dont' know why my mac book air run with safe mod and then
Write with capital letters
Thank you

Bardiasharifi wrote:
mac book air run with safe mod and then
Write with capital letters
Shift key is stuck.
Do you have a spare usb keyboard? if so, use it until you can take the computer to the Apple store to have it fixed.
Best.

How to boot T42 into safe mode

Hi all, first post.
I have a T42 with Firefox 4 installed that is giving me trouble. I want to be able to boot into safe mode to help troubleshoot the problem.
I have tried to rebbot and use the F8 key but it does not work. I have tried the F11 key and the Access IBM button and both bring me to the Rescue and Recovery login which asks for a password. I don't have the password as I did not set it up. I read on the forums that I could delete and reinstall R&R and that would reset the password.
I uninstalled R&R with rapid restore from the add/rmove programs panel (sorry, I don't remember which version). I have not tried to reinstall anything yet. When I reboot I still get the R&R ogin asking for a password. This leaves me with several questions.
How do I get around R&R, do I need to uninstall something else?
Is there a simpler way to just reset the password?
How do I find out what version of R&R with RR I had and what should I replace it with. Apparently 4.23 may not be my best option. I assume the original Windows backup partition will still be there. I din not have any backups of my own.
Finally, I just need to get into safe mode. Is there an easier way.
Many thanks for any help!

Try using the msconfig utility's boot tab to turn on the Safe boot checkbox, then restart.
On Windows 7, I can just tap Windows+R, then type msconfig and press Enter. I think in XP, you might see a Run option somewhere on the start menu. Or if you can get into the Task Manager (press Ctrl+Shift+Esc ?), select File > New Task (Run) ... Or even just browse for msconfig in C:\Windows\System32
It sounds like maybe someone has set up a BIOS password -- this may be irrelevant to getting into safe mode.Or if there is a separate R&R password I never noticed, that should be irrelevant to Windows, too.

How to not show the safe mode windows (pop up) ,starting using safe mode

Firefox safe mode
Safe Mode is a special mode of Firefox that can be used to troubleshoot issues.
Your add-ons and custom settings will be temporarily disabled. You can also Reset Firefox if you want to start fresh.
Start in Safe Mode Reset Firefox
This window I want to cancel whenever I want to use the command line
"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -safe-mode How to do it? Thanks

There is an extensions.enabledAddons pref that you can find on the <b>about:config</b> page.
A possibility would be to have two versions of a user.js file to initialize this pref with the installed and enabled extensions and copy the one you need by starting Firefox via a cmd file.
If you are that tight on memory then you would only have to run one version at the time.
*http://kb.mozillazine.org/user.js_file
There are plugin.state prefs to disable plugins in case you want to do that as well, but plugins are only used when you visit pages that use them and setting all plugins to "Ask to Activate" should be sufficient.

How to get out of Safe Mode?

Hi,
I started up in safe mode and was able to trouble shoot a peripheral problem. However, I still have a HD icon on my desktop. How do I get out of Safe mode? I did restart a couple of times but the icon continues to appear.
Thanks!
S

If you have rebooted, then you are no longer in safe mode. The HD icon is not an indicator of being in safe mode. If you don't want to see hard drive icons on the Desktop, you can set that preference in Finder -> Finder menu -> Preferences -> General.

Blue screen but booting with safe mode

hi,
my macbook screen suddenly went blu color. when i reboot it, i got the same blue color screen after the apple logo.
but when i boot under safe mode, it boot perfectly. i have run disk fix and all other minor fix they run successfully but still the problem did not solved.
my macbook is 2.2GH, core 2 Duo white color, 2GB Ram 667MHz.
some body told me the logic board is damaged, but why it is booting undersafe mode. i want to make sure what is the trouble to replace it with reasonable price.

What version of Mac OS X are you using? Did you have a Windows partition on your Macbook. If you don't have a Windows partition then you may have a bad extension(s). Start in safe mode again then launch the Console app in the Utilities fold, take a look a the system log for any errors.

Crashes in safe mode when I press addons, after disabling all addons with safe mode.

Firefox 6 crashes when opened. I booted into safe mode an pressed addons from the menu and it crashes again. I disable all addons permanently with the safe mode option and restart same problem occurs.

More detail:
Booted into safe mode its starts. However when i press addons from the menu it crashes.
Then I used the safe mode splash screen to disable all addons and the same thing happens I can load but as soon as I press addons menu it crashes again.

How do you get to safe mode

I can't get the phone to open is safe mode, nothing listed appears to work.

Hell CalWxGuy!
I'd be happy to help you start your device in Safe Mode. Are you having issues with your phone? Click the link for instructions to put the device in Safe Mode. http://spr.ly/65824lHM
Safe Mode boots the device up without any third party apps. So some of the features you customarily use may not be available.
MichelleH_VZW
Follow us on Twitter @VZWSupport
If my response answered your question please click the �Correct Answer� button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!

How to start firefox in safe mode from the command line

This is for Window XP, firefox 19

Hello jjfirefox77
"C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode
thank you

How to permanently disable Firefox Safe Mode option in firefox version 22?

We have a requirement to disable the safe mode option in Firefox so that everytime firefox can be started in normal mode even if the firefox browser was crashed previously .

hello, you could try this - enter '''about:config''' into the firefox location bar (confirm the info message in case it shows up) & search for the preference named '''toolkit.startup.max_resumed_crashes'''. double-click it and change its value to '''-1'''. this will only disable safemode after a certain amaount of crashes occurred though, not when somebody launches it manually...

How to config cpupower with laptop-mode-tools

I comment everthing in /etc/rc.d/cpupower and add (@cpupower laptop-mode) to daemon section of /etc/rc.conf
However, cpupower seem not support my cpu fully.
$ cat /proc/cpuinfo | grep 'model name'
model name : Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz
model name : Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz
model name : Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz
model name : Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz
$ sudo cpupower info
System's multi core scheduler setting: not supported
System's thread sibling scheduler setting: 2
System does not support Intel's performance bias setting
analyzing CPU 0:
Why M450 doesn't support shced_mc. What is different between sched_mc and sched_smt.
Last edited by SuperBo (2012-05-04 07:34:17)

I done it but I have another problem:
The PCs connected to the LAN receive the IP dynamic but the laptop not.
If I put a static IP (for example 192.168.1.10) the laptop is connected but have problem with routing.
What can I do ?
thanks

How to start my mac book pro safe mode?

my mac book pro is not start up but showing white screen . what should i do ?

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

How to Further Diagnose with Safe Mode

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