How to Open a Magsafe Power Adapter (5 Steps)

Unplug the adapter from the power outlet and allow it to cool for a few minutes.
Remove the grounded wall cord or 2-prong wall plug connector from the adapter.
Hold the adapter and cut along its seam, using the circular metal cutting tool; cut only on one side of the adapter.
Flip the adapter over and cut along the seam on the opposite side.
Pry the halves of the casing apart with the putty knife, cutting more if necessary. Be sure to keep track of the cord winding tabs, as they will fly off if you pry too vigorously. The adapter should now be opened.
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