4.This picture is intended to show how the access tool disengages the latch. Pushing the tool up the vent on the rear cover releases the latch on the inside of the front bezel. Refer to the next step for the procedure.
5.Start on the left side (looking from the back of the unit). Insert the card to disengage the latch. Squeeze the top of the bezel, that will help take pressure off of the latch and enable it to open easier. As the bezel releases, pull the bezel away from the rear housing.
iMac
