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“If upgrading from macOS Sierra or later, macOS Big Sur requires 35.5GB of available storage to upgrade. The Big Sur support document specifies 44.5GB is required if you are upgrading from 10.10 Yosemite or 10.11 El Capitan, and your Air must be 2013 or newer (you omitted to mention the year of your MacBook Air). Before upgrading make a full back up of your Mac. Then go to the Download OS section and click on the OS you want to install.

Go to Check Compatibility to see if your mac qualifies for the OS upgrade you want. How do I update my Mac when it says no updates available?Ĭlick on the  top left of your screen click on About This Mac to find out the year of your mac. This means that if your Mac is older than 2012 it won’t officially be able to run Catalina or Mojave. If you Mac is supported read: How to update to Big Sur. Can a Mac be too old to update?Īpple said that would run happily on a late 2009 or later MacBook or iMac, or a 2010 or later MacBook Air, MacBook Pro, Mac mini or Mac Pro. High Sierra will update automatically when downloaded. Fin the last tab in the top menu, Updates. How to download macOS High Sierra Make sure you have a fast and stable WiFi connection. How do I upgrade from OS X Yosemite to High Sierra?