Apple makes it relatively simple to find older versions of macOS, but they aren't always visible in the "Updates" section of the App Store.
Always remember to back up your data using Time Machine before initiating the download and installation. A failed installation is rare, but losing your files is a risk never worth taking. download macos catalina
Before you hit "Install," a little housekeeping prevents a lot of headaches. Catalina is roughly 8GB, but you should have at least 15GB to 20GB of free space to ensure a smooth transition. Apple makes it relatively simple to find older
Use the App Store Link: Open your browser and search for the official Apple Support page titled "How to download and install macOS." From there, click the macOS Catalina link, which will redirect you to the Mac App Store. Before you hit "Install," a little housekeeping prevents
Check Compatibility: Ensure your Mac supports 10.15. Generally, this includes MacBook Air and Pro models from 2012 and later, iMacs from 2012 and later, and the Mac Mini from 2012 or later.
Paste the following command: sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume