You could spend Valentine's Day stuck in the office crying alone, or you could spend it playing indie games which have recently been ported to Mac. Marc Essen's Flywrench and You Found the Grappling Hook are both available now, for free, and ready to ruin your productivity.
Flywrench is a side-scrolling
schm'up race thing while Your Found the Grappling Hook is a neat little platformer distinguished by its titular grappling hook.
You can grab both titles directly from Essen's website.
Essen is better known as the creator of the delightful Nidhogg, which has won a number of awards.