which itunes version will this mac book air supports

iTunes was last supported on macOS Mojave.

What happened to iTunes? - Apple Support

Don't forget Books.

Hum - Books was part of iTunes ? Long time since on High Sierra.

Good catch :-))

Don’t forget the part of iTunes that moved into Finder, too.

And now Finder can get confused, in a very iTunes-like manner.

And this computer may Qualify for Monterey - Tips Monterey Upgrade .

Though, as previously mentioned, Catalina, Big Sur and Monterey have replaced iTunes with three separate Applications called Podcasts, Music and TV.