If you want to treat your Mac Pro to some super cool and super fast SSD action, take a look at the Sonnet Transposer. The adapter fits any 2,5″ standard SSD into a 3,5″ hard drive bay. This might do the trick to bring you amazing startup times and programme response at acceptable costs. Transposer is compatible with 3Gb/s and 6Gb/s SATA. The drive tray adapter is $39.95.