SSDs - do I need something special in Hardware Stuff Posted August 24, 2012 · Edited August 24, 2012 by Dolphbucs Huskr, from what I've been seeing around the forums, it may depend on what OS X version you are running and whether or not the firmware of the specific SSD is compatible. There was one post, for example, on the TWiT forums where a member tried to place a 3rd party SSD into a Mac Pro. The SSD manufacturer said it was Mac compatible in the documentation, but it did not work ... and further investigation revealed there was a pending future firmware upgrade for the SSD that would make it so. I would do a search on Youtube for upgrading your model iMac to an SSD and if there is a video, use the SSD make and model mentioned to be sure. UPDATE: I just reffered back to that TWiT thread I was talking about ... poster was running Mountain Lion so John may be correct and you may be fine since you are running Snow Leopard. I'd still be cautious though.