MacBook Air Lock for the MacBook Air 11". The MacBook Air Lock and Security Case Bundle Includes: MacBook Air Security Case and Cover and MacBook Air Security Cable Lock. Most MacBook Air owners use a cover/skin to protect their computer. Mac Locks have created a simple but clever solution; it incorporates a neat cover that also protects your MacBook Air via an integrated built-in security slot that can accommodate any of the standard cable locks sold on the market. That way you can lock the security cable to the case, and loop the cable's other end around a fixed object (like a table). Once the case and cable are locked together, thieves can't detach the case without damaging the MacBook Air.