The RM-KB Rackmount Computer Keyboard in Sliding Shelf is part of the Middle Atlantic line of modular rack systems. It occupies 1.75" (1 Space) and includes a high-quality full 101 key, 12" AT style keyboard, with trackpad and padded wrist-rests. It also comes complete with keyboard and trackpad cables including one DB9 serial adapter and USB adapter. An articulating arm provides effective cable management. Finished in a durable black powder coat.
Yes this is compatible with Macs and has emulation functions to mimic the keys on a typical Mac as illustrated on page 32 of this document :