Not quite. You can get a free certificate for non-appstore apps. Apps signed with the free cert aren't reviewed or endorsed by Apple, but they can revoke the

Not quite. You can get a free certificate for non-appstore apps. Apps signed with the free cert aren't reviewed or endorsed by Apple, but they can revoke the certificate after the fact if they find that you've been publishing malicious apps. The Mountain Lion default allows signed apps only, both appstore and non-appstore. You can also set it to 'appstore only' or 'anything goes'.