I recently installed OS X Mountain Lion on a 27'' iMac (late 2009) and I am not able to set the display resolution to 2048x1152 as I did on Lion. In fact, the initial version of Lion didn't allow that resolution but it appeared in the resolution list after a system update (I don't remember which one).
Is there any way of setting the display resolution to 2048x1152 on Mountain Lion?
I have uploaded two screenshots:
Resolutions in Lion:
Resolutions in Mountain Lion:
Thanks in advance.