How To Update Macos High Sierra 10.13.6 To 10.15

macOS Catalina - Technical Specifications - Apple Support (IN)

Updating from macOS High Sierra 10.13.6 to 10.15 is a relatively straightforward process that can be completed using the Mac App Store or the Software Update mechanism. By following the steps outlined in this article, you'll be able to successfully update your Mac and take advantage of the latest features, security patches, and performance enhancements that come with macOS 10.15. how to update macos high sierra 10.13.6 to 10.15

If you rely on older software—especially Adobe CS6, Microsoft Office for Mac 2011, older games (Bioshock, Sims 3), or niche utilities—they will simply vanish after the update. They will not run. There is no compatibility mode. macOS Catalina - Technical Specifications - Apple Support