I just got this app from the app store (free) and tried it on my 2011 27" iMac. The speed is around 90~100 MB/s Does that sound right? My iMac is about 6 months old. Everything is fine. I am just curious if that is a correct result. I see that the Macbook air 11"'s SSD is about 240 MB/s so it means the macbook air SSD is 2.x times faster than the iMac?