I recently switched from my Apple MacBook Pro (Late 2011) to a MacBook Retina. You might know that the latest versions of the retina MacBooks (as the MacBook Air) do no longer sport a Kensington security lock hole.
As I work on sports events and concerts where I have to leave my MacBook in the Press Rooms, I had to look for an alternative to lock it. There are several options in the after market to get Kensignton locks fixed. The majority of solutions consists of a shell that you put around your MacBook. I was rather looking for a solution that does not add any glued ring or case.
What I finally found was the PNY ThinkSafe (P-TSAL1-RB). Got it on Amazon for around 25€.
Works fine for me!
Posted from London, England, United Kingdom.