macOS menubar application: main menu not being displayed

Question

I have a statusbar application, which runs in the menu bar. Therefore I set Application is agent (UIElement) to true in the info.plst.

Answer 1

Based on the fix (or workaround) from OP. The key is really to toggle out and back to focus (thanks @Daniel!).

Some small improvements:

No force unwrapping, no need to set ActivationPolicy and call activate twice.

NSApp.setActivationPolicy(.regular)
window.makeKeyAndOrderFront(nil)    

NSRunningApplication.runningApplications(withBundleIdentifier: "com.apple.dock").first?.activate(options: [])

OperationQueue.current?.underlyingQueue?.asyncAfter(deadline: .now() + .milliseconds(200), execute: {
    NSApp.activate(ignoringOtherApps: true)
})