Connect 2018 Airmac to use late-2015 iMAC as a display
Have a 2018 airmac (1.6GHz i5) but want to use my old iMAC (late 2015 21.5" 1.6GHz dual i5) as a display.
The iMAC runs really slow, but screen is nice.
Looks like I would need a USB-C to a thunderbolt cable - do apple sell these, or do I need some other combination. Any reason it wouldn't work before I spend $60-80 on cables?
iMac 21.5″, macOS 10.15