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Possible Reasons and Fixes for Mac Not Starting in Safe Mode Possible Reasons and Fixes for Mac Not Starting in Safe Mode.If you have ever experienced any of the previously mentioned problems it would be a great idea to try Safe Mode first before having to dig deeper and employ more time consuming fixes. Safe Mode is a very useful and simple tool for trying to resolve some common issues with your Mac. Often times signs of a failing hard drive like slow response and constant pinwheeling are actually issues with directories and how the disk reads data. Using Safe Boot to start up the machine forces a background disk check and directory repair which can resolve issues related to startup and overall disk performance. The Disk Utility app is a great tool for isolating directory issues yet we aren’t always able to run that depending on the circumstances. The last common fix with Safe Mode is in relation to disk maintenance. Safe Mode would be beneficial to try to isolate that application as the culprit. If you are not able to make it past the apple loading screen and never reach your desktop, Safe Mode may be able to correct that.Īnother example is if you recently installed a new application and have noticed strange behavior such as sluggishness or frequent crashes. The first is the aforementioned startup failure. There are a couple of instances which immediately come to mind that would benefit from trying Safe Boot as a troubleshooting step. This is a great way to immediately see if your Safe Boot resolved any issues you may have been experiencing with booting. In order to leave Safe Mode, restarting the computer without holding any keys will resume the standard boot process. You will know you have successfully performed this task if you see the words Safe Boot in red font on older OS or by checking the System Profiler for the word Boot in Software.

Keep holding the shift key until the OS X login screen appears. Holding the Shift button informs the Mac that you would like to Safe Boot the machine and it begins to perform its disk and directory checks, deleting font caches, Kernel cache and other system cache files and disabling some drivers. Immediately after your hear the chime, press and hold the Shift button.

In order to start your Mac up in Safe Mode you will need to start with the machine powered off.Īfter the machine is off for a few seconds, click the power button so you hear the chime sound.