SourceTree - Mac and Windows client for Mercurial and Git.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
Fork - Fast and Friendly Git Client for Mac
TortoiseGit - TortoiseGit is an easy to use client for the Git distributed revision control system.
Gitfox - The foxy Git client for Mac