Make a Bootable USB macOS Installer Download the update for Big Sur compatibility
What’s needed for a clean install on a Mac
- A backup of the disk before it’s erased. Two options are to use Duplicate (a free utility which can copy and paste an entire bootable volume), or Mac Backup Guru (a paid, fully featured backup utility with unique incremental backups capability) for that. Here is a detailed guide for the process.
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A Mac operating system installer. MacOS Big Sur can be downloaded by clicking here.
If you need to recover deleted files take a look at Mac Data Recovery Guru on our sister-site dedicated to data recovery.
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