If you're having difficulty finding or installing updates: Learn about the latest macOS upgrade, or about old versions of macOS that are still available.
Upgrade Now installs a major new version with a new name, such as macOS Big Sur.This includes any of the following signs: Sagging in the middle or at the corners. Learn about macOS Big Sur updates, for example. &0183 &32 If your mattress has visible signs of disrepair, its time for a new one. Update Now installs the latest updates for the currently installed version. &0183 &32 Look at the number right of the 'Up Time' heading.From the Apple menu in the corner of your screen, choose System Preferences.