we've all been there... we downloaded some strange album from archive.org but it's in some weirdo format (flac or vob or ape or youwillneverbeabletoplaymeformat). what's a self respecting osx user to do? eh? riddle me that.
fear not askabetterquestion.net has the answer for you. well, two answers in fact. Max and XLD (X Lossless Decoder).
both deal with these problems. both work well. for my money (oh yes, did i mention they are free?) i would go with XLD. it's minimal, fast and gets out of your way. go for it.