We're not aware of any hangs on launch related to 10.12.6 (or in general.) Please sample the application using Activity Monitor and attach that here for us to review. You might try setting aside your preferences as well to see if it's something specific in there. Apologies for the hiccup.
Senior Mac Developer, Sourcetree
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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