A few minutes ago Apple released an update to Xcode 4.1, which is required to build apps for OS X Lion. Xcode 4.1 Developer Preview 4 is available now in the Mac Dev Center, and we’re hearing Interface Builder added support for NSPopover and NSWindow animations in this build, among other enhancements and bug fixes.
The first build of Xcode 4.1 was released in February soon after the original Lion Developer Preview, with new builds following the schedule of Lion DP releases and updates.
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