You can also use the built-in recovery tools that come with the macOS installer to troubleshoot and fix different kinds of issues. This can save quite a bit of time, considering the most recent versions of macOS have an installer size of 12GB. Why Would You Need to Install macOS From a USB?Ĭreating a bootable USB drive and using it to reinstall macOS is a bit of a lengthier process compared to simply updating macOS from the Software Update section of the System Preferences, but it has its benefits.īut creating a bootable USB disk allows you to install or update macOS on multiple systems without having to download the installer on each Mac.
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