Just got big sur on my mid 2012 macbook air : r/mac
MacOS Big Sur On The Oldest MacBook Air! - YouTube
macOS Catalina: Everything you need to know
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How to Update Your MacBook Air Laptop
macOS Ventura brings powerful productivity tools, new Continuity features to Mac - Apple
Installed macOS Monterey my Unsupported MacBook Air (Mid 2013) with Patcher, performance quiet same Big Sur. Working with new features AirPlay and Live Text. : r/MacOS
Identify your MacBook Air model - Apple Support
MacBook Air (13-inch, Mid 2012) - Technical Specifications
Identify your MacBook Air model - Apple Support
Installing macOS Catalina 10.15 Beta - Experience so Far - TechWiser