Updated November 2020: Updated for macOS Big Sur's public release. Questions?Īny questions about performing a clean install? Let us know below in the comments.

Agree to the software terms and conditions.Īre you in the market for a new MacBook? Check out our favorites for the year.Click Continue again when the installer window appears.Click on Reinstall a new copy of macOS.Step 4: Reinstall a new copy of macOS Big Sur If Scheme is available, select GUID Partition Map.If your Mac is using APFS, select APFS from the format list. If your Mac is using HFS+, select Mac OS Extended (Journaled) from the format list.

Enter a name for the file to be destroyed (Like macOS Mojave or something).

Click on Disk Utility in the OS X Utilities selector.Ĭlick on the Erase tab at the top of the window.

Hold down Command-R when you hear the startup chime (or the screen turns black on newer Macs) and keep holding the keys until your computer reboots.

Connect your Mac to the internet via Wi-Fi or Ethernet.

These options are available only when an APFS volume is. Choose Edit > Add APFS Volume from the menu bar, or click in the Disk Utility toolbar. In the sidebar, select your existing APFS volume.

How to create a bootable installer for macOS Big Sur Open Disk Utility, which is in the Utilities folder of your Applications folder.

If you don't create a bootable drive for macOS Big Sur, you may have to install an older Mac operating system first and then upgrade to macOS Big Sur afterward. You'll need a copy of macOS Big Sur to perform a clean install later on.

Step 2: Create a bootable drive of macOS Big Surīefore you erase your current operating system, download macOS Big Sur from the Mac App Store.

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