Click the Format pop-up menu (APFS should be selected), enter a name, then click Erase.Select your startup disk on the left, then click Erase.In Disk Utility, choose View > Show All Devices.In the Recovery app window, select Disk Utility, then click Continue.Start up your computer in macOS Recovery: ….How do I wipe my Mac and install a new operating system? … If you’re planning to upgrade your Mac or iOS devices with Apple’s newest software, you should make it a point to back up before you install these new versions. Remember to Back Up Before You Upgrade to New macOS and iOS! New versions of Apple’s operating systems are coming to your iOS devices and Mac. Do you need to backup before updating Mac OS? In the Time Machine window select your disk. Go to “Apple” and click on “System Preferences”. Connect the USB, Firewall or thunderbolt external drive to your Mac. How to Make a Backup before macOS Sierra Upgrade How do I update my Mac operating system? How do I backup my Mac before updating?.How do I install a new operating system on my Mac?.What’s the difference between Apfs and Mac OS Extended?.

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How do i backup my mac