For a step-by-step walkthrough of the entire upgrade process: How to Upgrade to Catalina Mac OS X 10.15 Gemsbok Apple Tips and Tricks YouTube• Dec 4, 2019 Troubleshooting & Tips macOS - How to Upgrade - Apple (SI)
If your Mac is stuck on High Sierra because it lacks Metal graphics, (like DosDude1’s patcher). While possible, those patched systems are highly unstable on modern internet services in 2026. how to update macos high sierra 10.13.6 to 10.15