I'm fairly certain all of the displays only use a 60Hz refresh rate. The AG and glossy both use the same panel, just a different cover, and I can't change the refresh rate on my computer either.
Holding option when you click "displays" should give you the refresh rate drop down menu, at least it does for my external monitor. Unfortunately everything but 60hz is greyed out.
Yeah, my external actually has an option for 59 as well as 60, but I see no reason to change it.
The AG and glossy both use the same panel, just a different cover, and I can't change the refresh rate on my computer either.
this is not true. The anti glare display has a matte coating on the LCD panel and is otherwise exposed. The glossy display is simply covered by the glass and uncoated.
The LCD panels in fact have different model numbers as well.
This is not what alust2013 was getting at. They meant that on all MB/MPB's, the refresh rate is not changeable.
Also, to the OP, why must you change your refresh rate? What is the reason?
I don't know how long you've been on Mac OS X but OS X doesn't offer a refresh rate change, only the resolution can be changed. I have a 27" iMac and the HR AG MBP and neither offer a refresh rate change. It's really unnecessary to do that as anything out of the norm would cause eye strain.