The iPhone Dev-Team have confirmed that the latest version of Redsn0w is fully compatible with Apple’s new OS X Mountain Lion software. However, until it has been signed with a Developer ID, you’ll have to bypass Gatekeeper to use it.
One of the new features of OS X 10.8 Mountain Lion has been the addition of Gatekeeper. By only allowing apps to be installed from the Mac App Store, Mountain Lion’s Gatekeeper feature gives users a new level of security from malicious software.
Some users feel Gatekeeper is a sign that Apple is moving toward a completely closed desktop operating system that will only allow apps from the Mac App Store to be installed. Easing concerns of this draconian controversy, this afternoon Apple announced the Developer ID program that will help third-party developers distribute their apps safely outside of the Mac App Store.
Mountain Lion’s GateKeeper feature is designed to improve Mac security by harnessing the power of the Mac App Store and through a new developer program in which Apple will offer Developer IDs to members of its Mac Developer Program. Those IDs will let developers digitally sign their applications so that Mountain Lion Macs can verify an app’s authenticity and security before running it.
While this may seem like a new approach and an extension of the Mac App Store model, it’s actually based on technology that has been part of OS X since the release of Leopard.