>>Requires Mac OS X 10.8 or later
Apparently it is not the interface I have been missing...
Having a Git tool not available for Linux is blasphemy
IntelliJ IDEA (after a while getting font rendering working properly) has an amazing set of VCS functionality and works quite nicely on Linux (have used on Gentoo and Arch). Of course it's ostensibly aimed at JVM languages, but has good support for PHP/JS/Python/Ruby/etc. There's also an upcoming C/C++ toolchain for it (the CLion experimental builds will eventually be a plugin for IDEA too). Most of the great VCS features are available in the non-commerical open-source branch too: