Solution! - Original thread was: Unable to fix "Call fail" on Mac
I've been having an issue with "Call Fail" on my new MacMini M4 since January. It is has been VERY bothersome.
I reside in the EU and it seems Apple has made a conscious decision not to allow iPhone Mirroring here.
Solution: Tether your iPhone to your Mac via the USB-C cable. I have successfully done this on my Mac mini and MBA. This works perfectly for making and receiving calls.
I hope this alleviates everyone's frustrations over this!!!
Mac mini (M4)