Extended Display not working on iMac 2021 M1 with macOS Ventura
I have an iMac 2021, M1 running on Ventura and an unsupported iMac 2013 also patched to Ventura. Funny is that from the (unsupported) 2013 I can extend display and use the 2021 as additional monitor. But the other way around does NOT work, i.e. the iMac 2021, M1 running on Ventura does not allow me to extend display to the 2013. Solutions?
iMac, OS X 10.11