Dual Monitors using two iMacs
Can I use a 21/12 imac , built in late 2013, with Catalina, as an extended monitor to a 27 inch iMac , built in 2019 using Monterey ?
iMac 21.5″, macOS 10.15
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+1. You need to buy an external display if you want/need 2 displays. This is the only method that will work.This is far easier to setup, does not require expensive cables, and is more reliable than Target Display Mode.
