Pre-orders and previews begin April 10, launches April 24.
'Marble' Project Actually Xcode 4?
In January 2009, both MacRumors and Daring Fireball's John Gruber began hearing rumors that Apple was working on a project code-named "Marble" that was believed to be an overhaul of the Mac OS X interface set to appear with Snow Leopard later that year.
As time went by, however, Gruber noted that "Marble" was unlikely to appear in Mac OS X Snow Leopard, and indeed the new operating system did not carry the significant overhaul many had been hoping for, leading to speculation that it could still appear in Mac OS X 10.7 whenever that sees the light of day.
Yesterday, Gruber revealed that "Marble" actually appears not to be a Mac OS X interface revamp but an overhaul of Xcode, Apple's developer tools for Mac OS X and iOS. A beta version of Xcode 4 was previewed at Apple's Worldwide Developer Conference earlier this month, but with the sessions covered by non-disclosure agreements, it was taken some time for details on the update to come out. One of the major changes in Xcode 4 is the integration of Interface Builder into the larger Xcode application, creating a unified interface that comprises the "Marble" project.
Xcode 4 is still in beta, Apple doesn't have screenshots available, and what was shown at WWDC 2010 is covered by NDA. But if you have a developer account, you can get a tour of the new interface by watching the Developer Tools State of the Union session. It is, to say the least, a major overhaul - primarily focused on doing more within a single window, even going so far as to bake Interface Builder into Xcode itself. According to several informed sources at WWDC, that's the "Marble" project.It is unknown when Xcode 4 will make its official debut, but it appears to promise a significantly enhanced development environment for creating and testing applications.