How To Update Macos High Sierra 10.13.6 To 10.15 [best] Jun 2026

Alternative: Clone your drive using software like Carbon Copy Cloner.

The computer may restart several times, and the fan might run loudly. This is completely normal. how to update macos high sierra 10.13.6 to 10.15

However, this is not a “simple click update.” Because you are skipping two major OS versions (Mojave and Catalina), there are critical compatibility checks and preparation steps you must take before pressing the upgrade button. Alternative: Clone your drive using software like Carbon