SourceTree comes with the command-line 7z.exe inside it so it can extract the embedded Git archive. Please do try downloading again as the archive seems fine here - also please check whether you have any proxy servers (e.g. corporate network) which may be intercepting your download.
Supported Platforms macOS Windows We recently introduced support for additional hosting services such as GitHub Enterprise, GitLab (Cloud, Community Edition, Enterprise Edition), and...
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