How To Update Macos High Sierra 10.13.6 To 10.15 Jun 2026

Your Mac will save the installation files and restart. During the installation process:

Look at the tab. You will see your Mac model and the year it was released (e.g., MacBook Pro (Retina, 15-inch, Mid 2014) ).

If on a laptop, keep it plugged into AC power.

The following Mac models natively support macOS Catalina 10.15 : : Early 2015 or newer MacBook Air : Mid 2012 or newer MacBook Pro : Mid 2012 or newer Mac Mini : Late 2012 or newer iMac : Late 2012 or newer iMac Pro : 2017 or newer Mac Pro : Late 2013 or newer

Double-check your specific model at everymac.com or Apple’s official support page. And remember – you can always download the Catalina installer from the App Store, even if Apple technically says your Mac is “vintage.”

macOS Catalina requires a significant amount of free storage space.

Operating system upgrades require a stable environment and sufficient storage space to execute smoothly. Clean Up Storage Space

If any mission-critical applications are 32-bit, you must source a 64-bit alternative or update your subscription before moving forward. Step 3: Back Up Your Data

Before upgrading to macOS 10.15, it's essential to prepare your Mac for the update. Here are some steps to take:

Your Mac will now begin writing the installation files and will eventually restart. The screen may go black or show an Apple logo with a progress bar multiple times. This is completely normal and can take anywhere from 30 minutes to over an hour. Troubleshooting Common Upgrade Issues "The disk uses the Mac OS Extended format"