There never was an internal blu-ray drive from Apple in any Mac, before they abandoned optical drives altogether. Steve Jobs once famously said: "blu-ray is a bag of hurt"!
To know the model of your Mac, click on the (apple) in the menu bar, and choose the first item (About this Mac).
I'm not sure what was happening with bluray initially but they just play on the Mac if you have a bluray drive.
For a while the available bluray slot loading drives would only fit in the 17" models. There's a 9mm thick (thin) model available now that you can install in the 15" models. Panasonic UJ-267. It's true that the post-Jobs models abandoned the optical drive. They also abandoned: Magsafe power port (need to charge thru a USB jack now), full compliment of ports (USB-A, firewire, Ethernet, Thunderbolt with standard display port style connection), screen shield on standard def models, logic board build quality. The post-Jobs machines aren't very Apple-like anymore.
Apple did in fact try to do battle with FLAC and push their own version of Apple Lossless (ALAC). They were stubbornly not including the FLAC codec in iTunes to push it. They didn't follow through and sell Apple lossless in the iTunes store and ended up with iTunes being this obsolete media player that didn't play standard FLAC files. iTunes is kind of like abandonware now. Any other media player is better. Even that Foobar app the Windows users like! I'm still using simpleton Songbird here myself. (No updates for a few years now. Still just works. Let's me mix surround/stereo/whatever formats in a playlist and everything always comes out the correct speakers.)
XLD is the winner for format conversions. It includes the 32:1 decimation for the virtually lossless conversion of DSD to PCM (@ 32 bit floating point, 88.2k).
ffmpeg is the most happiness and light video conversion app I've ever found! Strongly recommend this one too!
VLC is still a goto choice for most video formats as long as any included audio is strictly either 2.0 or 5.1 (and not ANY other channel format) and you don't need gapless segues between chapters. (Using the video term "chapters" here. And that's the reason VLC doesn't do gapless. It's a video player programmed to work with chapters.)
There's an AV player that will do the less popular channel formats correctly (like 4.0, 5.0, etc), will do gapless, and even does full decodes of the 'ringer' format that is dts2496. Kodi Media Center. The GUI is truly awful and will instantly turn you off! They're doing the clumsy take over the system and try to make their own "OS skin" as it were. Taking over file browsing and such. You can avoid that and turn some of the crap off but... you've been warned! It plays some of the lesser popular formats and gets it right though, so it has that going for it.