This is Part III of my article series of my MKV remuxing series (last part HERE), with two main subects: Perian (and the Perian-dependent Subler) on Mountain Lion and selecting the right version of one of the most recommended MKV remuxers, MP4Tools. Let's start with the former.
1. This is how you can still use Perian on Mountain Lion – and remux all your MKV's with Subler