DivX Version 5.0 Alpha リリース（Free）
http://www.divx.com/divx/maclinux.php

（案内）
Compatibility with all versions of DivX video content. DivX 5.0 Alpha
for Mac OS can play every version of DivX video ever created, from
prior to 3.11 alpha to the brand new DivX Pro 5.0.
* MP3 Audio Fix. The Alpha version includes a first pass at a fix for
the MP3 audio QuickTime bug. This bug prevented MP3 audio from
playing properly in AVI files. We're working on a workaround, and it
works pretty well, but it will continue to get better. Let us know
how it works.
* Improved encoding and decoding performance. DivX 5.0 Alpha is
initially optimized for G3 processors. We still haven't finished full
G4 optimizations. Those are coming.
* MPEG-4 compatibility. DivX 5.0 can decode MPEG-4 Simple Profile,
MPEG-4 Advanced Simple Profile, and H.263 video (all levels). It is
also able to encode fully MPEG-4 Simple Profile compliant video
(ISO/IEC 14496-2).
* Scalable. DivX video has been test on and can work on a wide range
of video bitrates, from 28 Kbps to 9 Mbps, depending upon your
encoding needs.

現在デコードのみ。将来的にエンコードもできるようになるらしい。
WindowsのAVIファイルをQuickTime Player で再生できるのを確認しました。