Search Criteria: Platform

I play a few games on my Mac, and I've tried to find a 'search by platform: Mac' somewhere, but have come up short - have I missed something? It would really help IMHO.

Ah, I've found the Advanced Search feature, but I still cant pull up a Mac-only game list. Might a suggest "Mac Games" an addition to the drop-down menu?

Ah, I dig the View by Platform option that you get once you're in a Category.. Perhaps a user-set toggle could allow one to view only games that are available in your chosen platform?