X Lossless Decoder (XLD) is a tool for OS X that is able to decode/convert/play various 'lossless' audio files. The supported audio files can be split into some tracks with cue sheet when decoding.
XLD supports the following formats:
(Ogg) FLAC (.flac/.ogg)
Monkey's Audio (.ape)
Wavpack (.wv)
TTA (.tta)
Apple Lossless (.m4a) [10.4 and later]
TAK (.tak) [Requires Wine]
Shorten (.shn) [SHN v3 only]
AIFF, WAV, etc.