There are four softwares for mac release now.
They have preparation released for a longtime, today it release eventually!
Congratulated~~
Here are the news:

ImTOO Apple TV Video Converter for Mac:
The Apple TV Video Converter for Mac software provides easy way to convert most popular video formats to Apple TV Video MP4 formats. Moreover, it can convert video to iPod MP4 for Video iPod and new iPod 30GB and 80GB together with the resolution for 640 x 480, and so easy to handle and so fast to finish all your tasks.


ImTOO Video Converter for Mac:
The Video Converter for Mac is versatile Mac Video Converter Software for Mac users specially, which can convert between almost all video/audio files like MOV, AVI, WMV, MPEG1/2/4, 3GP, ASF, MP4, MP2, MP3, WMA, OGG, AAC, M4A, WAV, AC3, etc. on your Mac OS X.


ImTOO MP4 Converter for Mac:
The MP4 Converter for Mac is specially made for Mac users. With versatile functions and various settings, the Mac MP4 movie converter can convert video/audio files like AVI, MPEG, VOB, 3GP, MOV, MP4, M4V, WAV, WMA, M4A, AAC, MP3, MP2, 3G2, AC3 to MP4 movie and music files directly like MP4, AVI, M4A, AAC and MP3.


ImTOO iPod Video Converter for Mac :
Powerful function of ImTOO iPod Video Converter for Mac enable you converting all popular audio and video files, such as AVI, MPEG, WMV, MOV, MP4, VOB, DivX, XviD, AAC, AC3, MP3, etc. to the formats supported by Video iPod including MP4, MOV, M4A, MP3.


So cool, right?
If you have a MAC, are you deeply attracted by this Mac version conversion software? Free download the trial version and try it now. You will get satisfied high quality output

You could search it from the google and get more information about them