New Software Update Macbook. The latest updates watchOS 621 and macOS Catalina 10154 are available for eligible devices. The updated Messages app lets Mac users send and receive more personal and expressive messages and easily keep track of and interact within group messages.
MacOS Catalina 10157 provides important security updates and bug fixes for your Mac. If a you see a Software Update available click UPDATE. If your MacBook Air finds a new update select Update Now.
MacOS Sierra 10126 macOS High Sierra 10136 and macOS Mojave 1014.
MacBook Air 2018 07 Nov 2018. If your MacBook Air finds a new update select Update Now. If your MacBook doesnt find a new update a message will appear that says Your Mac is up to date. ICloud for Windows 78.