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by phamilton 5353 days ago
HDMI can't drive 2560x1600. Mini DisplayPort can.

+1 Macbook Air...
1 comments
pedalpete 5353 days ago
According to Wikipedia, HDMI 1.3 & 1.4 can support 2560x1600 and much more. http://en.wikipedia.org/wiki/HDMI#Version_1.4

At the same time, I have no idea what version this laptop is supporting, but seeing as 1.3 is already 5 years old, I'd suspect that is the minimum currently supported.

link