SourceTree git filter support broken

This is the OSX version of SRCTREEWIN-4687.

We have a smudge/clean filter called "git bin" (https://github.com/seeq12/git-bin) that we use to deal with large files. (git-lfs didn't exist until recently or we probably would have used that.)

As of my upgrade in December, SourceTree's invocation of git no longer finds the "git bin" filter. Invoking "git bin" works fine from the OSX command line. There is a video attached to the issue referenced above that walks through the issue. But to be clear, the same behavior is experience on the Mac (which is this bug).

This has prevented me from using SourceTree. I have use the git CLI to do anything that involves pushing/pulling.