As of now Apple Lossless Audio is not supported with video in a .m4v/.mp4 container. Both the developers of MP4 Tools and Subler say ALAC is not sported yet. Main Goal: Transcode Blue Ray DTS-HD Master Audio or TrueHD Audio to Apple Lossless. This way one could losslessly transcode a complete Blue Ray to a .m4v container playable by iTunes/Quicktime X. Obviously a full transcode is already available with MakeMKV. But again natively DTS-HD Master Audio and TrueHD are not supported in the .m4v container. eAC3to (Win) can already transcode DTS-HD Master Audio/TrueHD to FLAC, which then can be transcoded to Apple Lossless (Mac). But no Muxer that I am aware of can mux Apple Lossless and raw H.264 together. If possible I would see an Applescript to would chain together the following: Blue Ray > MakeMKV > demux (MP4Tools 3) > ALAC transcoder > mux (H.264 & ALAC). I'm sure it would be plausible to create a Mac app in the near future that could transcode like eAC3to or at least get Wine support rolling. And of course VC-1 Blue Rays would be off limits from the get go.