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Using an iMac as a Monitor Is More Complicated Than You Might Think
Working Apple iMac 21.5" 21.5 INCH MID 2010 i5 3.6ghz 2TB HDD 8gb Computer | eBay
apple-history.com / iMac (Mid 2010)
Apple iMac 21.5in (2010) Review | Trusted Reviews
Incase anyone ever needs the answer…I have a 27” 2010 iMac working in Target Display Mode with a M1 MacBook Pro using a miniDP to USB C adaptor that's capable of 4k60Hz.
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