At the 360|MacDev conference, Jay Freeman (aka Saurik), who is the creator of Cydia store for iPhone, iPad and iPod touch has confirmed that he and his team are working to bring Cydia to computers running Mac OS X.
Currently, Cydia Installer has been used by about 10% of all iPhone users, or about 10 million devices. There are well over 30,000 packages available for iOS, and a lot of open source material can be downloaded from Cydia. He refers to Cydia as a store for things that are not apps, but extensions of what iOS devices can do.This is a very huge advance for the jailbreak scene. Not only will there be jailbroken iDevices, now it's being expanded for Mac! This will be out within weeks! Any developers interested in trying to get their app into Cydia for Mac is always free to contact Patrick at saurikit.com
Freeman felt that the same type of store would be useful for Mac OS X devices; the result is a Mac Cydia, which will be available "within weeks." With today's news that the Mac App Store will not support in-app purchases, something that is critical to the freemium app model that is so successful in the iOS world, a Mac Cydia might be just the web store for a number of Mac developers.