Hi Jonathan,
I'm no expert but I have ripped Blu Rays on a Mac a few years ago. It wasn't that hard.
I have an internal Pioneer Blu Ray recorder that I bought several years ago from Other World Computing. It wasn't expensive. That drive sits in the other drive bay in a Mac Pro. I know that there are also external drives and probably lots of other options for Blu Ray drives.
You need a program that will take the file on the Blu Ray disk and make it into an MKV file. I used the software Make MKV, it's easy to find on the web but there are probably other programs that will also make an mkv file. After making the mkv file you have to import that into Handbrake or something that can read an mkv file and export from there into a usable format.
Anyrate it did work but I'm no expert. I use the drive for backing up data usually.
hope this helps,
Sandy