Before you begin, you must ensure your hardware can handle Catalina. Generally, if your Mac was made in , it is compatible. MacBook: Early 2015 or newer MacBook Air / Pro: Mid 2012 or newer iMac: Late 2012 or newer Mac mini: Late 2012 or newer Mac Pro: Late 2013 or newer Step 2: Essential Pre-Upgrade Checklist
"That can't be right," Elias said, pulling out his phone. A quick search confirmed his suspicion. The jump from High Sierra (10.13) to Catalina (10.15) was a "major version leap." While minor updates happened automatically in the background, major leaps often hid behind a wall of compatibility checks and specific App Store listings. High Sierra was the last version to support 32-bit apps, and Catalina was the first to cut them off completely. Because of this, Apple didn’t always push the update aggressively. how to update macos high sierra 10136 to 1015