Summary: Xcode cannot find the documentation for most delegate methods, which in the Mac OS X 10.6 SDK are now defined by formal protocols. If you option-double-click the method in your source code, you just get "Documentation not found". Steps to Reproduce: 1. Launch Xcode 2. Create new Cocoa application project 3. Wait for project indexing to finish 4. Open AppDelegate.m file 5. option-double-click applicationDidFinishLaunching: Expected Results: The documentation for applicationDidFinishLaunching: is displayed. Actual Results: "Documentation not found" Regression: This bug seems to occur with all formal delegate protocol methods, such as NSApplicationDelegate, NSWindowDelegate, and NSToolbarDelegate. Curiously, the bug does not occur with the NSApplication delegate method application:delegateHandlesKey:, which is not part of the NSApplicationDelegate protocol but rather is a category method on NSObject. 05-Mar-2010: Your feedback and suggestion is appreciated. This request has been forwarded to the appropriate engineering team for review and consideration and will be closed and tracked offline. Please be sure to regularly check the seed notes and release notes for any updates that might affect this issue. 05-Mar-2010 Jeff Johnson: I don't understand why this bug can't be tracked here in the bug reporter. Isn't that the whole point of the bug reporter, to have the bugs we reported forwarded to the appropriate engineering team? That's always been the case before. Is this bug a duplicate? If so, why wasn't it marked as a duplicate? If it's not a duplicate, then why has it been closed?