AFAIK, XLD always adds the correct tag in FLAC files. For AAC you need to check an option:
It's worth making sure that you have the most recent XLD version: 20131102
I think you'll have to wait for the next firmware. For me, gapless works pretty well from category play, but I have too many tracks for the X3 to index in one go which means I don't use it that much, but in browse mode, I frequently get the freezes etc that everyone is reporting.
As tjw321 has mentioned, the software that rip your files must adds the gapless tag onto the music so the playback software will know whether it is gapless music or not. I don't know any software that can add gapless to files that already been ripped (unless you go the long way by creating an iso, mount and rerip it with gapless enable), and I am not a Mac user so I can't really offer much help there.
who cares as usual I will always find people who are fanboys and don't dare to admit something is missing in the product.
Sorry dudes this x3 needs an eq
Do you think you could go troll in a different forum or go buy a Clip and play with your EQ until your heart is content?
Check my post history I won't quality for fanboi
However the X3 may need an EQ for your needs, but you are not everyone.
I don't feel it needs one. Maybe sell your X3 and get something you can Rockbox?
Well, different strokes for different folks ...
Me, I'm quite happy with the sound from the X3 .... I wouldn't use EQ even if it was available. I don't listen to MP3s or AACs - just FLAC, and I'm amazed at the sound from the X3.
Yes, the UI needs work - but Fiio seems to be very active here and they appear to be good at updating the firmware.
EQ - no need for me. Now playlist capability - that would be nice!