Well, I done did it. 2011 Apple MacBook Air 4,2 support added in Libreboot. UNTESTED, so pushed to WIP branch. I'm waiting for the one I ordered to arrive.
Patch:
It compiles. It auto-downloads me.bin by first downloading an Apple EFI firmware update as a .dmg file from Apple, directly. The .dmg file is LZMA compressed inside, so lbmk uses 7z from p7zip recursively until it finds me.bin inside (bruteforced with me_cleaner on each file until neutered me.bin is created).
Every Zelda clone fan and Genesis/Mega Drive fan keeps on saying that this is a hidden gem, but I don't see why. It's good, but it pales in comparison to Zelda. It's pretty linear (uses the Mario style level select for the overworld), lacks sidequests, and using animal partners in place of items doesn't sound appealing to me at all.