I got involved with burning BluRay about 4 years ago, and made a lot of $20 coasters before finding a path that works 99% of the time.
First, and foremost, the FCP "Share" path does not work. It will cogitate for a day and then crash. It won't inform you of this -- it will just show the beach ball until the Second Coming.
Obviously, DVDSP is a non-starter, and that is forever.
Apple does not officially support the making of BluRay disks (beyond the one-off "share" screener, which doesn't work) and they don't endorse or offer any BluRay devices. This is not going to change, and that is a lead-pipe cinch.
You will have to resort to an array of third-party solutions if you want consistent success. I have had good luck with the LG drives -- stick it in a NexstarDX enclosure and if you can eSATA to it, it works a treat. (Although most Macs will identify it on an "unknown bus". Like the one in the Harry Potter movie, I guess.
File flow -- Make elements in Compressor -- "BluRay usage", and pay attention to frame rates, resolutions and field dominance. These items must be set up correctly or you will be burning garbage, whether you live in a walled compound or not. If you want some navigation, you will require a better-quality authoring application. Adobe Encore appears to be the least worst, although you have to buy the Creative Suite to get it. However, that might not be such a bad thing. At least you'll be guaranteed to be able to use AVCHD in Premiere.
Next, save the Encore BluRay project as a "disk image". Don't attempt to burn the disk straight out of Encore. The navigation usually gets lost, especially if you have sub-menus.
You will have to acquire Toast Titanium with the BD plugin -- that's right, they charge extra for that. Pull the Encore disk image into the Toast BD partition and burn it from there.
Voilà, a BluRay disk that is at least 99% compatible with everything else in the world. That was easy, right? Thanks, Apple.
jPo