Just purchase a 2020 iMac 5K 27inch, and Target display will not work. I tried everything and called customer service. This is very frustrating as it worked decently on my 2017 iMac 5K 27inch that I gave to an employee. I would not have purchased a newer iMac if I knew I would lose that feature.
I really hope Apple could fix this soon.
mikulskithethird
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