I have recently purchased a Mac Pro desktop (not Macbook Pro notebook/laptop) and am looking to physically secure it to a desk. It doesn't have a security slot so some locks may not be appropriate. However, those familiar with the Mac Pro will know that it does have a small security hole beneath the latch at the back of the unit. It also has metal 'loop' handles at the top and bottom of the unit, which could also be used to thread a cable through. Ideally I'd like something with either a combination lock and/or key lockable, and with a good quality cable. This is more important than the price! If anyone knows of a reliable lock suitable for this machine, then I'd be grateful to hear of it. Many thanks!