Start up from an OS X startup volume when the Mac would otherwise start up from a non-OS X startup volume.Įject (⏏), F12, mouse button, or trackpad buttonĮject removable media, such as an optical disc. Reset NVRAM. Release the keys after you hear the startup sound again. Start up from OS X Recovery over the Internet. Start up from a NetBoot server using the default boot image. Start up from a compatible NetBoot server. Start up to either Apple Hardware Test or Apple Diagnostics over the Internet. Start up to either Apple Hardware Test or Apple Diagnostics, depending on which Mac you're using. And beneath each disk you should see any containers and volumes on that disk. The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. Start up from a bootable CD, DVD, or USB thumb drive (such as OS X install media). Select your disk in Disk Utility Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility. The links below point to other support documents on Apple's website. I'm betting many of you don't know them all, either, so here they are. I was personally familiar with these and several others, but it turns out there are 15 total combinations, thanks to a KnowledgeBase article Apple posted. Command-S is for "single-user mode," which essentially means booting to the command line. Shift key, for instance, starts your Mac in Safe mode, and C (or c) starts up from a bootable CD, DVD, or thumb drive. Your Mac and OS X have a variety of startup keys and key combinations you can use to affect how the device starts up.
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January 2023
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