How To Update Macos High Sierra 10.13.6 To 10.15: !!top!!

Always use Time Machine or an external drive to back up your Mac before a major OS transition.

Before starting, confirm your Mac is on the official compatibility list for macOS Catalina: Early 2015 or newer MacBook Air: Mid 2012 or newer MacBook Pro: Mid 2012 or newer Mac mini: Late 2012 or newer iMac: Late 2012 or newer iMac Pro: 2017 or newer Mac Pro: Late 2013 or newer 2. Pre-Upgrade Checklist how to update macos high sierra 10.13.6 to 10.15