Name it as Macintosh HD and fill in the information like scheme and format. Select the startup drive in Disk Utility and click on the Erase button at the top menu. Select Disk Utility from macOS Utilities when the utilities window pops up. It works well when troubleshooting problems with your Mac, especially if you can’t boot from the primary hard drive to access System Preferences. Boot your Mac into macOS Recovery Mode by pressing and holding these two keys: Command () and R. This is an easy way to select a startup disk before your Mac turns on. Your Mac will boot from the startup disk you selected. Click the arrow directly below the drive.Select the disk you want to use as a startup disk.A screen displaying all of the available startup disks appears. Immediately press and hold down the Option key.
#Selecting boot drive mac at startup how to#
Here’s how to change your Mac’s startup disk:Ĭonnect the drive you want to use as a startup disk to your computer.įrom the Apple menu, select System Preferences. Changing Your Mac’s Startup Disk with System Preferences
:max_bytes(150000):strip_icc()/format-mac-drive-using-disk-utility-os-x-el-capitan-later-2260751-befc233e5020482f8dbbd2886cf59e0b.jpg "selecting boot drive mac at startup")
Normally, the startup disk is set as the hard disk inside of your Mac, but you can use an external hard drive, USB thumb drive, or DVD as your startup disk. When your Mac turns on, it loads the operating system on the designated startup disk, a hard disk or partition containing the macOS operating system.
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