The latest version of macOS is macOS 11.0 Big Sur , which Apple released on November 12, 2020. Apple releases a new major version roughly once every year. These upgrades are free and are available in the Mac App Store. Apple's newest Mac operating system is macOS 11.0, also known as macOS Big Sur.How do I update my Mac OS X?
Tap the Apple icon at the top left of your Mac's main menu bar, and choose "Software Update...". The Mac App Store will open, showing you available updates. You'll have to agree to an Apple user license agreement. If other updates are offered, run those as well as the OS X updates.Which are releases of macOS are supported with security updates?
Advertisement. For example, in May 2018, the latest release of macOS was macOS 10.13 High Sierra. This release is supported with security updates, and the previous releases-macOS 10.12 Sierra and OS X 10.11 El Capitan-were also supported. When Apple releases macOS 10.14, OS X 10.11 El Capitan will very likely no longer be supported.