Developer Preview Update 1 Released for Mac OS X 10.7 Lion

Today, Apple released a minor update for the developer preview of its upcoming Mac OS X 10.7 Lion operating system.

The update, known as Mac OS X 10.7 Lion Developer Preview Update 1, is now available through Software Update and marks the first such update since the initial release of the developer preview on February 24, 2011.

At just 2.2 MB, the update itself is quite small.

According to the details provided, this update is essential for accessing downloads of future Mac OS X Lion seed builds directly from the Mac App Store, shifting away from the Software Update method.

This development comes on the heels of reports that Apple is preparing to release a Golden Master version of Lion, suggesting that the final features of the OS are nearly finalized.


Matthew is a dedicated writer for TUAW, bringing insightful and engaging content to Apple enthusiasts around the world. With a deep love for all things Apple, Matthew covers everything from the latest iPhone and iPad releases to MacBook innovations and Apple Watch updates. His articles are known for their clarity and depth, making complex tech topics accessible to everyone. When he’s not writing, Matthew enjoys exploring new apps and testing out the latest Apple gadgets.