Abstract: A security apparatus for a portable electronic device having an aperture includes a lock mechanism having a lock cylinder and a cam member. The lock cylinder is configured to be rotated by a key. The cam member is coupled to the lock cylinder for rotation with the lock cylinder. The cam member has a slot. The security apparatus also includes an engagement mechanism having a first finger, a second finger, and a plunger. The first finger and the second finger are configured to be inserted into the aperture of the portable electronic device. The plunger is positioned between the first finger and the second finger and has a cam follower positioned within the slot of the cam member. As the cam member is rotated by the lock cylinder, the plunger pushes the first finger and the second finger apart from each other to engage the portable electronic device.