A friend of mine and I bought a copy of MATLAB 7 Release 14 Service Pack 3 for my MB and his MBP for $100 each. During registration, we could not get either computer to find the machine id. He called Mathworks and they told him that it doesn't work on Intel Macs. I have noted that many on this site talk about using Matlab on their Intel Macs. So why won't it work for us? Did you have to do something backwards?