How To Update Macos High Sierra 10136 To 1015 |top| [95% CONFIRMED]

Once the download is complete, the installer should open automatically.

Google “How to get older versions of macOS” and find Apple’s official page, then select macOS Catalina.

Click "Install" and enter your administrator password.

macOS Catalina dropped support for older 32-bit graphics architectures. This means not every Mac capable of running High Sierra can upgrade to Catalina.