To play Blu-ray discs under OS X you need four things: A Blu-ray drive (I have an LG in a BYTECC USB2/FW enclosure), Make MKV, VLC (or other streaming-aware app) and a reasonably beefy Mac (quad core works great, but probably requires a 2.8 gHz dual core). It's a bit of a convoluted process, but works nonetheless.Insert a Blu-ray disc, then after it mounts in the Finder launch Make MKV. After it reads the disc, click on the Open Disc icon and it starts decrypting the disc. This takes about 30 seconds to complete. You're then presented with a list of titles - find the largest as that's likely the movie. Next click on the Make MKV server icon to launch the server, then click on the http link in the server box. This opens a window in your web browser with something like this:This page is designed to be read by robots, not humans. For this it is a valid xhtml text document with a simple structure. Each page contains exactly one table that in turn contains name-value pairs which may point to other tables (web pages) or files to stream.This feature is experimental - discs that use seamless branching will likely not work.name valueversion MakeMKV v1.4.10 beta darwin(x86-release)address 10.0.0.2:51000titles /web/titlesClick on '/web/titles' to get to the next window:name valuetype Blu-ray discname Star Trek Disc 1titlecount 5title0 /web/title0title1 /web/title1title2 /web/title2title3 /web/title3title4 /web/title4In the case of Star Trek, title2 is the main feature. I click on the title2 link and then get this in a new Firefox tab:name valueid 2duration 2:06:50chaptercount 14formatcount 2format0 m2tsfile0 /stream/title2.m2tsformat1 tsfile1 /stream/title2.tsClick on the link /stream/title2.m2ts and a new tab opens in Firefox with the Quicktime icon. Copy the URL (which for Star Trek on my system is http://10.0.0.5:5100...am/title2.m2ts) and then open VLC, choose File > Open Network and paste the URL into the box, hit return and the movie starts playing. Unfortunately, VLC doesn't seem to be all that great so you need a really good Mac, probably 2.8 gHz or better with a dual core, or any of the quad cores. MPlayer Extended has great video playback but every time I use it the audio gets out of sync.