How can I find my computer ID?
Where can I find my computer's unique ID number? I have a Mac Pro (Dual Core Intel Xeon) running OS 10.5.8.
Mac Pro, Mac OS X (10.5.8)
How to find the serial number of your Apple hardware product
If I knew what you were looking for I could help better. There is no such animal as a "unique computer number." There is a MAC ID, however, which can be found using Network Preferences. It's also on the computer's ID plate on the rear of the computer.