macOS Catalina drops support for several older Mac models that were capable of running High Sierra. Before attempting the installation, verify that your machine is officially supported. Supported Mac Models 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 How to Check Your Mac Model Click the Apple icon in the top-left corner of your screen. Select About This Mac .
Search for "macOS Catalina" in the App Store. how to update macos high sierra 10136 to 1015
Click and enter your Mac’s administrator password. Step 4: Wait for Completion macOS Catalina drops support for several older Mac
Ensure you’re on the final build of High Sierra (10.13.6) with all security updates. Select About This Mac
Upgrading from macOS High Sierra 10.13.6 macOS Catalina 10.15
If using a laptop, plug it into a power source during the update. Step 2: Essential Pre-Update Checklist