Release the D key when you see the choices appear.Start or restart your Mac and immediately press and hold the D key on your keyboard.
#Mac safe mode startup how to#
How to start up from the Apple Hardware Test or Apple Diagnostics You can run Apple Diagnostics once you think you've isolated the issue to a possible hardware issue. If there are issues with your Mac that you think may be related to the hardware, you can run the Apple Hardware Test. Start up from Apple Hardware Test or Apple Diagnostics: D
![mac safe mode startup mac safe mode startup](https://i.stack.imgur.com/ngp8V.png)
#Mac safe mode startup software#
Safe mode is a way of starting up your Mac that makes sure it performs certain checks and prevents specific software from loading or opening automatically.
#Mac safe mode startup mac os x#
![mac safe mode startup mac safe mode startup](https://itigic.com/wp-content/uploads/2021/03/mac-safe-mode.jpg)
Disables all startup items and login items (Mac OS X v10.4 or later).
![mac safe mode startup mac safe mode startup](https://images.macrumors.com/article-new/2020/12/apple-silicon-safe-boot.jpg)
Moves to the Trash all font caches normally stored in /Library/Caches//(uid)/, where (uid) is a user ID number such as 501 (Mac OS X v10.4 or later).Disables all fonts other than those in /System/Library/Fonts (Mac OS X v10.4 or later).In Mac OS X v10.3.9 or earlier, Safe Mode runs only Apple-installed startup items (such items may be installed either in /Library/StartupItems or in /System/Library/StartupItems these are different than user-selected account login items).Loads only required kernel extensions (some of the items in /System/Library/Extensions).You may see a progress bar on the screen during this check, and the computer may take longer than usual to complete its startup process Forces a directory check of the startup volume.Starting up into Safe Mode on your Mac computer does several things: