used Mac Pro tower
MA356LL/A - MacPro1,1
2 x 2.66GHZ Xeon
3GB Ram (Max 32gb)
3TB ( 4 drives)
Max os 10.7.5
With box
The first Intel-based tower Mac, the Mac Pro "Quad Core" 2.66 is powered by two 2.66 GHz dual core Intel Xeon 5150 processors.
Perfect if you need to keep running older Mac programs.