Mirroring Display Wirelessly from MBA to iMac?
I just purchased a secondhand 21" iMac, and I'd like to use it to mirror the display of my 13" MacBook Air. Is it possible to do this wirelessly, and if so, how would I do it? And either way, what will I need to do to mirror my MBA's screen on the iMac?
iMac 21.5″, macOS 10.13