08-07-2015, 08:06 PM
flareslow wrote:
I have that the Acer K272HUL connected to my 2012 Mac Mini, using a miniDisplayport to Displayport cable with no adapter. I'm getting 2560 x 1440 at 60Hz as I type this. No adapter required.
According to Everymac and Apple that's within spec. For the OP's older Mac, both sources list dual-link DVI as a requirement for that resolution. As such, I'm guessing it's the Mac, not the monitor, as source of the problem.