How To Update Macos High Sierra 10136 To 1015

Boot into Safe Mode (hold Shift at startup) and clear caches and Time Machine local snapshots:

Common issues and fixes

Elias smiled. He opened his browser. The banking site loaded perfectly. No warning messages. how to update macos high sierra 10136 to 1015

After thirty minutes of silence and progress bars, the Mac chimed one last time. A new desktop appeared. The owner logged in and was greeted by setup questions about Screen Time , and the choice between Light and Dark mode. High Sierra was gone. The Mac was now running Catalina 10.15 Boot into Safe Mode (hold Shift at startup)