What is the current status of this issue? In the Xcode/iOS 26.4.1 SDK, attempting to use Metal 4 symbols still causes an error. The code below works when targeting iOS Device, Designed for iPad, or mac, but for the Simulator, I get the error: “Cannot find protocol declaration for ‘MTL4CommandQueue’; did you mean ‘MTLCommandQueue’?” #import <Foundation/Foundation.h> #import <Metal/Metal.h> @interface MyClass : NSObject @end @implementation MyClass - (void)test { id <MTL4CommandQueue> queue; } @end