Dual E5-2650 Xeon (Mac Pro 3,1) OS X 10.9.2
mmcminer 12 threads gets me 1.3 hash/min

It will sometimes spike (in the terminal window), but it doesn't get much above this for the value shown on mmcpool.com

Does anyone know if these results are typical?  Also, is there an optima code for my machine? I have 24GB of RAM, and mmcminer uses 1, and I don't see a way to let/tell it to use more