Mac os x start in safe mode

How to use your Mac’s Safe Boot

From here, you can choose to boot from different connected hard drives, USB flash drives, network locations, and other boot devices. To boot directly from the network with Netbook, press and hold N instead. To access this tool, press and hold the D key while booting your Mac.


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  6. Start the system in Safe Boot mode.
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Select your language and your Mac will automatically test its hardware and inform you if anything is wrong. Macs offer a Safe Mode, also known as Safe Boot. When you boot in Safe Mode, your Mac will check its startup volume, only load necessary kernel extensions, and disable third-party fonts and startup options. To load your Mac in Safe Mode, press and hold the Shift key while it boots. You can stop holding the Shift key when you see an Apple logo and progress bar. To leave Safe Mode, just reboot your Mac without holding the Shift key.

To leave this mode, type reboot at the prompt and press Enter. If your Mac is freezing, especially during the boot process, the messages here can help you identify and get help with the problem. If everything goes properly, your Mac will boot to its normal desktop. Recovery Mode provides various graphical tools for working with your Mac. You can then choose your language and use the graphical tools here.

7 Mac Startup Options Every OS X User Should Know

When you hear the Macs startup sound, press and hold the shift key. With your Mac running in Safe Mode, you can troubleshoot the issue you were having, such as by deleting an application that's causing problems, removing a startup or login item that's causing issues, or launching Disk First Aid and repairing permissions. You can also use Safe Mode to initiate a reinstall of the current version of the Mac OS using a combo update. Combo updates will update system files that may be corrupt or missing while leaving all of your user data untouched.

How, why and when to boot Mac in Safe Mode

In addition, you can use the Safe Boot process as a simple Mac maintenance procedure, flushing many of the cache files the system uses, preventing them from becoming too big and slowing some processes down. Share Pin Email. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc.

Perform a directory check of your startup drive. Load only the bare minimum of kernel extensions OS X needs to run.

How to Start Up Your Mac in Safe Mode

These are the fonts supplied by Apple; all third-party fonts will be disabled. Move all font caches to the trash. Disable all startup or login items.


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  • How to Tell You’re in Safe Mode?
  • Delete the dynamic loader cache OS X This can fix problems that cause a blue screen freeze at startup. DVD Player won't work. Devices connected to the audio in or audio out won't work. Internal or external modems won't operate. AirPort cards may not function. This depends on which version of the card and which version of the OS is in use.

    Reasons to start your Mac in Safe Mode

    Quartz Extreme won't run. Applications that use Quartz Extreme features, such as translucent windows, may not work correctly. Network file sharing will be disabled in OS X