New answers tagged cinema-display
I am assuming that you are referencing a 27" Late 2013 iMac because there is no 21" iMac that has that specific CPU frequency. You can have up to two external displays connected via Thunderbolt according to the specs posted on EveryMac.com I have used 30" and 43" displays with my iMac and there has been zero lag. I also only have SSDs (no hard drives) ...
Here are the steps: Go to the Apple Menu (top-left hand corner) Click About this Mac Check your graphics card, What does it tell you it can handle?
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