Finding the serial number using Mac OS X
On most Mac OS X computers, you can easily find the serial number in the About This Mac window. See the article "About This Mac window provides computer serial number" for instructions.
Finding the serial number on the computer
All eMac computers have their serial numbers printed inside the disc drive door. You can see this number when you eject the optical drive tray; just press the Eject key on your keyboard.
Identifying which eMac model you have
Every eMac has an identifying configuration code that's made up from the last three digits of its serial number. Once you've found your eMac serial number, look at its last three characters—this is your computer's configuration code. Just match your number with the configuration codes below to find out which eMac model you have.
|Configuration codes||eMac model|
|eMac (USB 2.0)|
|eMac (ATI Graphics)|