RELATED: How to Update Your Mac and Keep Apps Up to Date How to Erase Your Mac and Reinstall macOS Quicklyīefore you begin, make sure you have backed up your Mac using Time Machine or another backup solution of your choice. You’ll also need to update your Mac to macOS Monterey or newer. If you have an Intel Mac you can click on “System Report” followed by “Controller” or “Bridge” to see if there’s a T2 chip inside. You can find out which Mac you have by clicking on the Apple logo in the top-left corner and clicking “About This Mac”. Open disk utility and drag the disk image into it then insert a DVD and burn it (make sure verify image is checked). Then go to the /Contents/SharedSupport/ folder and locate the InstallESD.dmg disk image. The feature is limited to most Mac computers released after 2017 which contain the T2 security chip, and newer machines that use ARM-based Apple Silicon chips like the M1, M1 Pro, and M1 Max. Go to your applications folder right click on the Install Mac OS X Lion package, and select Show Package Contents.
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