Always plug your MacBook into a wall outlet during an OS update to prevent unexpected shutdowns. Step 3: Back Up via Time Machine

Upgrading from macOS High Sierra 10.13.6 to macOS Catalina 10.15 is a substantial but rewarding project. The key to success lies in thorough preparation: verifying your Mac is compatible, creating a Time Machine backup, eliminating 32-bit apps, and freeing up disk space. While the Mac App Store is no longer functional on High Sierra, using Safari to access Apple's direct download page is a reliable workaround.

Clicking the link will trigger the Mac App Store to open directly to the macOS Catalina page. Click the or Download button.

Upgrading from macOS High Sierra 10.13.6 to macOS Catalina 10.15 is a significant jump. It moves your Mac into a modern era of features like Apple TV, Podcasts, and enhanced security, but it also marks the end of support for older 32-bit apps. Follow this guide to ensure a smooth transition. Step 1: Check Compatibility

Apple officially limits macOS upgrades based on hardware generation to guarantee performance stability. Before attempting to download the installer, click the in the top-left corner of your screen and select About This Mac to verify your computer's model and production year.