Finding and decoding your MacBook EEE code
One of the best ways to find more information about your Apple computer is to locate the EEE code on the Logic Board.
The EEE Code can be found within the MLB (Main Logic Board) number, which is located on a sticker on the logic board.
The MLB number is related to, but different than the serial number. The EEE code is the first three characters in the last 4 digits; (the first 4 characters of the last 6 in newer models).
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how to identify macbook pro A1278 logic board part number