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mac-thg / INSTALL.txt

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** Please do not run setup.py **

On Windows, we prefer you use the more recent stable release, which
can always be found at http://tortoisehg.org

On Linux, the suggested methods for using TortoiseHg are to either
install a package built for your distribution, or run directly out of a
cloned repository.

For source install details, see:

http://bitbucket.org/tortoisehg/thg/wiki/developers/Hacking