Apple is no longer restricting Mac OS X betas to paying developers. Anyone with an Apple ID (which is, let’s face it, essentially every Apple user at this point) can now sign up for the OS X Beta Seed Program to test unreleased versions of the operating system. You have to agree to Apple’s OS X Beta Seed and Confidentiality Agreement and install the Beta Access Utility to view betas in the Mac App Store. After WWDC, we’ll see if this applies to major releases of OS X, or just minor updates.follow link
View Silver Screen Media on Your Apple TV from another Disk
Want to watch movies via Silver Screen that aren't in your Movies folder? Just create an alias in your Movies directory and select that as your Media Directory in Silver Screen's preferences. It will even be automatically mounted if needed when the folder is browsed in Silver Screen. To make the alias, mount the server or other disk in the Finder, locate the folder containing the movies and Command-Option-drag the folder's icon into your Movies directory.
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Apple Opens Mac OS X Betas to All