You must have asked about pirated content or tools of disable DRM on protected content. iTunes will play non-DRMed MP3 files. So too will the QuickTime Player. This is why you see so little action in third-party MP3 players on the Mac. Here the action is in converters and editors..
Eveidently my perfectly honest post was moderated by some kind of moderator. Hilarious. I asked about MP3 files and the post was deleted. wow.
Vox is a little and simple music player for Mac OS X with support for many file types, including FLAC, MP3, AAC, Musepack, Monkey's Audio, OGG Vorbis, Apple Lossless, AIFF, WAV, IT, MOD, XM, Games Music and many others. Includes numerous effects like Equalizer, Reverb, Time Stretch, Pitch Shift, Echo. Moreover, all supported files can be exported to MP3, AAC, WAV and other formats with enabled effects.