With a simple turn of a screw your MacBook will have a compatible cable lock slot that will work with the security cable locks. The proprietary design does not require any adhesive or alteration to the body of the MacBook Pro and does not affect any functionality of the MacBook. The slim design of this extremely secure lock slot adapter integrates seamlessly with MacBook's minimalist appeal, and is ultra-lightweight at less than 0.1lb so it adds minimal bulk and allowing for the MacBook to fit in a sleeve or bag. It can be mounted on the left or right of the trackpad.