How To Update Macos High Sierra 10.13.6 To 10.15

Upgrading from macOS High Sierra 10.13.6 macOS Catalina 10.15

To update macOS High Sierra 10.13.6 to macOS Catalina 10.15, the process depends primarily on whether your hardware is officially supported. Unlike regular point updates, this is a major system upgrade that requires a full installer from the Mac App Store. 1. Verify Hardware Compatibility how to update macos high sierra 10.13.6 to 10.15

1. Go to System Preferences > Date & Time.
2. Ensure "Set date and time automatically" is checked.
3. Restart your Mac and try running the installer again.

Problem A: “macOS could not be installed on your computer – The volume cannot be downgraded.”

Cause: Your drive has a read-only snapshot that conflicts. Fix: Restart, hold Cmd + R to enter Recovery Mode. Open Disk Utility → First Aid on your main drive. Then try the installer again. If that fails, you may need to erase the drive (from backup) – last resort. Upgrading from macOS High Sierra 10