updated 12:25 pm EST, Fri February 4, 2011
Dev tool only requires Mac OS X 10.6.6
Apple has taken the unusual step of reseeding the gold master of Xcode 4, people with access to the development tool say. Rather than fixing any bugs however, the new software simply includes updated documentation, no longer insisting that Mac OS X Lion is required. In reality, Xcode 4 only requires a computer running Mac OS X 10.6.6 or later.
Bundled with the download are SDKs for Snow Leopard and iOS 4.2. The gold master is said to fix a problem with editing NIB files in the last preview release, Preview 6. Also dealt with are new snapshots, which wouldn't necessarily appear in the project organizer when a project had no snapshots to speak of.
Xcode has been redesigned to use a single-window interface for most content. Some other changes include integration of the Interface Builder with the main IDE, and fix-it, which highlights bad code elements in real-time. Apple has yet to say when the final version of Xcode 4 will be ready, though the company will likely simply post it in the Dev Center.