9/21/2023 0 Comments Macbook os x command r doesnt work![]() ![]() ![]() Not all these functions work with every version of Mac OS X or with every hardware upgrade, but they are the most common. Click Disk Utility option > Click First Aid and try repairing Macs disk 3. Boot Mac up, press Command + R during the boot-up process 2. Force eject (CD/DVD): Click Mouse Button and Hold Use Disk Utility to restore Mac from Recovery Mode when macOS High Sierra wont boot.Boot to open firmware: Command + Option + O + F.Reset PRAM: Command + Option + P + R (Note: Hold until second chime).Target disk mode: T (Note: Only for FireWire Macs).Safe-boot mode: Shift (Note: Disables nonessential and login applications).Boot to external hard drive: Command + Option + Shift + Delete. ![]() The following key combinations can be held as your Mac is powering on: While you cannot run any code from Terminal or otherwise to set an order of boot devices, you can easily control where your Mac boots via keyboard commands. The following is a more comprehensive list of the keyboard commands you know and many you may not.Ī recent tweet from reminded me of several boot commands I've learned over the years, so I thought a more comprehensive list would be useful for MacFixIt readers. Many users are aware of some boot commands for Mac OS X that provide different functionality for your system. ![]()
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