|Most likely Apple's ALAC codec is not open source and would require royalty fees to be paid for it's use in an audio player.
I, for one, could care less about ALAC as I don't use a Mac or iTunes.
See this exchange on Winamp forum on this topic, to quote DJ Egg speaking on behalf of Winamp
“ALAC is a closed proprietary format. Apple would never allow us to include an ALAC Encoder, definitely not for free anyway,”
WINAMP.COM | Forums - Apple lossless codec
So if Winamp is not able to use ALAC then what hope HifiMAN?
Off Topic: psychotic’s post is very interesting, if a bit difficult to read.