A long-standing stumbling block for people getting started with ST2 on the Mac was the need to specify the TeX binaries path in a somewhat esoteric (and hidden) OSX plist file.
Well, no more! To make a long story short, my hard disk crashed, so I had to reinstall and reconfigure the OS and software on my Macbook Pro. In particular, my now-virgin system no longer has the .MacOS/environment.plist file correctly set up. I decided to use this opportunity to fix things the right way.
Now, the LaTeX.sublime-build file recognizes a new option, “path”. On the Mac, it is preconfigured so it works with any recent default install of MacTex. You can change it if necessary, but most likely you won’t need to: the build system should now just work.
On Windows, recent versions of MikTex do the right thing and set up the path so no special setting is needed, but the option is available in any case to handle non-standard configurations. (Note: you still need to manually add the Sumatra directory to your path; I plan to fix this next.)
As usual, please pull from GitHub, test, and report any breakage.