Recently, Apple introduced the system of Developer ID to enhance the security of Mac. Now Apple is enforcing the new system of sandboxing to make Mac security, stronger.
After releasing the Mountain Lion Developer Preview update, Apple has released a new seed of Mountain Lion Server. Unlike some Mount Lion preview updates, which showed up in Software Update on Macs running the previous developer previews, Apple chose to make this update visible in the Apple Developer Center website.
This past Wednesday, on 16 May 2012, Apple gave developers another updated version of OS X 10.8 Mountain Lion Developer Preview 3. This, is the pre-release build of the next major Mac operating system refresh.