That probably means that SourceTree isn't correctly configured to find the git utility. Go to Tools > Options..., then click the Git tab. At the bottom it should tell you what type of Git it is trying to use. If "System Git" is selected, try switching to "Embedded Git".
If you need to use an external Git utility, make sure it exists on your system $Path variable.
Supported Platforms macOS Windows To make using Sourcetree as simple yet powerful as possible we embed (bundle) dependencies such as Git, Git LFS, and Mercurial. We strive to keep these...
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