Install git windows. As professional Mac video converter, Leawo Video Converter for Mac could convert video and audio with lossless quality like MKV to MP4, MKV to AVI, AVI to MP4, FLV to MKV, WMV to MOV, MP4 to MP3, MP4 to AVI, FLV to MP3, etc. By converting, no format limit issue would exist. Download free video software to play, convert and cast video, including DivX, AVI, MKV, and HEVC. Play DivX files everywhere.
Second to none Mac video converting program to convert video and audio for various devices
Easiest-to-use Mac video converter program to convert video and audio on Mac. Make your favorite movies playable on diverse devices and editable in various video editing programs.
The developer site seems to be unavailable now. For something newer, you might want to try. But if you read the readme file, here's an exerpt from what the developer has to say about the cost of the application:Besides being 100% freeware, Pic2Icon is 'Get Mike an internship at Apple doing Cocoa development'ware. 
I do hope you got that Apple internship.:)UPDATE 2011-01-04Pic2Icon is a pretty old app and hasn't been updated in awhile. Basically, whoever gets me the coolest internship at Apple this summer gets a registered copy of all future versions of Pic2Icon.Thanks for developing this app, Mike Margolis.
- Convert video and audio between more than 140 formats on Mac
- Expand movie enjoying to iPhone, iPad, iPod, Lumia 920, Surface, Galaxy S III, and any other devices in hand
- Preserve 100% of the original video’s quality after conversion
- Easily create 3D movies out of 2D source videos in 6 different 3D effects
- The latest Mac OS supported (10.8 Mountain Lion included)
Support OS: Mac OS X 10.6, 10.7, 10.8 or 10.9 Mavericks
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Avi For Mac Converter Freeware