Q: Types of SD cards supported

I have the last generation iMac and use both class 6 and 10 SDHC cards without any problems. I just checked the tech specs on the 2011 iMacs and there is no specific mention on the speed (class); the only thing I could find is that it is an SDXC slot; you might want to ask that question at an Apple store.

Have a look at > About the SD and SDXC card slot

Ha, thank you! I kept looking for something like it and could not find it!

your welcome!