In the last three betas of Xcode 26, opening XIB files that rely on the older struts-and-springs setup (rather than Auto Layout) has exposed a new problem: Xcode 26 ignore the difference between a view’s frame and alignment rectangle. If you had arranged views using their frame rectangle (the default for the old method) this causes two problems: All UI widgets are both larger and no longer aligned. Switching between frame and alignment rectangles while configuring any NSView (through the inspector setting) has no effect. Is anyone else seeing this? It’s one thing to convert a few smaller views to Auto-layout (its reliance on alignment rectangles makes it immune to the "death" of frame rectangle-based layout) it is a rather different task to re-layout thousands of UI widgets as a result of this one bug. Filed as FB18835363

When Xcode 26 Beta 5 compiles my XIBs into NIBs, it spits out a dependency on a class that isn't available pre-macOS 26, named _TtCC6AppKit14NSScrollPocketP33_EC3F85FAB7755D56E669206D2B17725B12BackdropView. All XIBs have a deployment target of macOS 12, so in theory this should be avoided. Even if this is a new (internal) class to macOS 26, the dependency is a problem when the developer is asking to deploy to prior versions. Has anyone else run into this regression? What could possibly be causing the XIB compiler to inject this dependency? The resulting NIBs don't load on anything prior to macOS 26.