It means your phone will not support playing ALAC Apple loseless files. Suggest you choose a different setting instead of original like FLAC. That way MC will convert them on the fly and then synch them over. The error is from your phone not MC, but MC is smart enough to poll and check first perhaps? Since both ALAC and FLAC are lossless there is no drop in quality. I have converted my whole library over to FLAC as the only lossless format I use.
Most Android phones will provide native support for MP3, FLAC, WMA, AAC audio, but not MP4.
Apple Lossless is usually stored as M4A file not MP4, as far as I know, so you comment seems puzzling.
