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How To Update Macos High Sierra 10136 To 1015

: Go to the Apple menu () > About This Mac > System Report > Software > Legacy Software to see which apps will no longer work.

Transitioning from 10.13 to 10.15 changes system files, user permissions, and the underlying disk structure. A failed update can result in data loss. Therefore, you must perform a full to an external drive. For additional safety, consider cloning your startup disk using software like Carbon Copy Cloner. Crucially, do not skip this step; Catalina converts the system volume to a cryptographically signed, read-only “Signed System Volume,” and while this usually works seamlessly, reverting is difficult without a backup. how to update macos high sierra 10136 to 1015

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