Note that the process here is slightly different if you are running macOS Catalina or Big Sur. You may need to click on View > Show All Drives before you can see the volume.

Now select the volume you wish to Erase.

Having selected Disk Utility, click Continue.

If you want to wipe your disk click Disk Utility (otherwise you can Your next step depends on whether you wish to wipe the Mac before reinstalling the operating system.

A macOS Utilities window will open, on which you will see the options to Restore From Time Machine Backup, Reinstall macOS, Safari (or Get Help Online in older versions) and Disk Utility.

Enter Recovery (either by pressing Command+R on an Intel Mac or by pressing and holding the power button on a M1 Mac as above).

Select Options and click Continue.įollow these steps to reinstall the latest version of macOS installed on your Mac: However, this has changed for the Mac that use Apple’s own processors, such as the M1 Macs introduced in November 2020 and the M1 Pro and M1 Max Macs that arrived in October 2021.Įnter recovery mode on an M1 Mac you need to press and hold the power button when you start up your Mac and continue to press and hold the button until you see a startup options window appear with an Options icon. How you do this will depend on whether you want to recover your Mac into the same version of the Mac operating system, or if you were hoping to do a clean install. What you need to reinstall macOSĪ back up: If you are planning to wipe your Mac as part of this process (either because you think that a clean slate might fix issues you are having, or because you are selling the Mac) you may want to back up your important documents first. If your Mac doesn’t boot in Recovery mode, read this:Ĭlean install of macOS using a bootable drive. Because macOS is normally installed via Software Update (or previously the Mac App Store) there are no physical installation disks, therefore Apple has made it possible to install the operating system over the internet using the Recovery HD.Ĭreate a bootable macOS install on an external drive. Using the Recovery partition via which you can reinstall the latest version of the macOS you installed on your Mac.

Os x utilities os x version