How to edit a native build system in Sublime Text 2?

Question

Ok this is very trivial question, but just cannot find answer anywhere.

I know there must be a JSON file with all the build systems somewhere, but I just cannot find

Answer 1

Mac:

Preferences ► Browse Packages will open the finder window where all the foo.sublime-build files are stored.

Build sys scripts you have created yourself should be in:

/Users/YOURUSERNAME/Library/Application Support/Sublime Text 3/Packages/User/