Is it possible to upgrade a MacBook Air 2012 to new software or newer software from 10.57 which is macOS Catalina?
Yes
Yes
No, Catalina's the highest version you can run. The only update would be a higher version of Catalina if one is ever released.
macOS Big Sur is compatible with these computers - Apple Support
No, Catalina's the highest version you can run. The only update would be a higher version of Catalina if one is ever released.
macOS Big Sur is compatible with these computers - Apple Support
Is it possible to upgrade a MacBook Air 2012 to new software or newer software from 10.57 which is macOS Catalina?