Upgrading from macOS High Sierra 10.13.6 to macOS Catalina 10.15 is a significant jump that transitions your system from a 32-bit/64-bit hybrid to a strictly 64-bit
Unlike High Sierra, . This means older versions of Microsoft Office (like Office 2011), Adobe Creative Suite, and many legacy drivers will stop working. how to update macos high sierra 10.13.6 to 10.15