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.

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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 Antispyware Security with USB Protection Max End Point Security-Business leverages client-server architecture to detect and delete threats.How to create a bootable installer for macOS Big Sur.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. VPN Deals: Lifetime license for $16, monthly plans at $1 & more 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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