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macrumors member
Original poster
Nov 28, 2010
Hi guys, I just got myself a macbook pro 2017.
I wonder if the imac 21.5 can be used as an external monitor for my macbook pro
I've actually read some saying only 27 inch is the only available option but i would like to get some confirmation here


Mar 19, 2009
Check this article to see which iMac models support Target Display Mode:

Any new iMac from Late 2014 onwards no longer supports Target Display Mode. This was originally due to bandwidth constraints of driving a 5K display. No other Apple computer except for the Mac Pro would have been able to do it at the time.
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