unpkg for Mac Unpacks files in .pkg installers to view/use without installing.
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unpkg for Mac Description

I hate pkg files on Mac OS X. I don't like how they can touch any part of the system they want. And many times the installer files are useless anyway; all they do is make sure an app is installed in /Applications, for example, which I can handle myself, thank you very much. So this utility simply unpacks all the files in a package into a folder in the same directory as the package. Very handy, and GNU GPL free too! NB: With many very system dependent pkgs, unpkg shouldn't be used, because it doesn't do any system related stuff, on purpose. But for simple applications (and even ones that just install extentions in places), unpkg should be fine.

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