Line 6 has updated POD Farm to version 2.5.3.
The Mac OS X installer is now signed for installation on Mac OS X 10.8. If installation is unsuccessful check the "Allow applications downloaded from:" setting in Settings>Security and Privacy>General it must be set to either "Mac App Store and identified developers" or "Anywhere" for installation to be successful.
The Windows update is just to maintain version number consistency between Windows and Mac OS X.