Upgrading the macOS from Catalina to Big Sur on a MacBook Air
Upgrading the macOS from Catalina to Big Sur on a MacBook Air 2015
Upgrading the macOS from Catalina to Big Sur on a MacBook Air 2015
See information in How to get old versions of macOS - Apple Support
You can also upgrade to Monterey: How to upgrade to macOS Monterey - Apple Support
See information in How to get old versions of macOS - Apple Support
You can also upgrade to Monterey: How to upgrade to macOS Monterey - Apple Support
Upgrading the macOS from Catalina to Big Sur on a MacBook Air