Mac's won't recognize Blu-ray devices because Apple chose not to support them in OS X. That's no longer the case thanks to Mac Blu-ray Player.
Mac Blu-ray player enables OS X to recognize Blu-ray devices instantly, meaning you can connect a Blu-ray to your Mac and watch Blu-ray discs. Not only that, but Mac Blu-ray Player supports almost every format out there so you can use it as your default player if you choose. Even better, for the first three months it's completely free to use, although a watermark is placed on the screen and some features will be disabled.
To play protected Blu-ray movies with Mac Blu-ray Player however, you need an internet connection because Mac Blu-ray Player has to acquire a license to play the movie on your system. Mac Blu-ray Player is fairly basic. There are very few options other than to add subtitles and change the audio track. When you start it up for the first time, it will also prompt you to select which files you want to associate with it so it won't take over your media files unless you allow it to.
Mac Blu-ray Player feels a bit basic in design and you might experience some crashes and instability, but bear in mind this is the first release and the developers warn that some bugs and problems are to be expected.
If you've been frustrated by the lack of Blu-ray player support for your Mac, then Mac Blu-ray Player could be your answer.