Enable SwiftUI Button Click-Through for Inactive Windows on macOS
On macOS, there’s 1 active window that receives your key input. Then there’s all the other windows, which are potentially invisible or obstructed by other windows. These inactive windows can be brought to the front and made active with a click. Then you can interact with these windows like normal. With inactive but visible windows, you cannot select items from lists, for example. The UI reflects this with a greyed-out or dimmed representation. You need to click once to activate the window (on the surface of the window, so to speak), then another time to interact with the control.