Unable to get Source Tree to ignore some folder hierarchies

[Don Clark]

My .gitignore file, in a project file, contains /Carthage/Checkouts/, but Source Tree won't ignore the folder hierarchy that exists in that project folder at Carthage/Checkouts.  I've also tried:

Carthage/Checkouts/

/Carthage/Checkouts/*

/Carthage/Checkouts/**

None of these cause Source Tree to ignore that folder hierarchy.  What is the magic syntax that I'm missing?

[Seth]

Are there files in that folder that have already been committed to Git? If so, you need to "remove" them from Git before they can be ignored.

[Tim Crall]

Yeah, that's my first thought as well

Use 

git rm --cached <filename>

to remove a file from the repo without deleting it from your working directory.

[Tim Crall]

Once you've done that, any one of your examples should work