SourceTree requires you to log in my logging in to Atlassian during installation.
Here is a related feature request: https://jira.atlassian.com/browse/SRCTREE-3593
EDIT: The original answer I linked to applies to Windows, not Mac, so I removed it. Sorry about that.
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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