.sit - What must I do with that?

Miscellaneous Forums/MacOS X Discussion/.sit - What must I do with that?

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I've seen lots of useful downloads for the mac, but the problem is that very much developers put their apps in a .sit file and for some strange reasons I cannot access those. Safari does mention that the .sit files could contain an application, but when I try to open that sit file, I get the notification that the .sit document is a document of an unknown type.

I can only guess that this is an error in the system configuration, but I don't know how to fix that.

You guys got a solution?