The Keyman OSK in Windows does not respond to key presses on the physical keyboard by changing the color of the key on the OSK to make it appear pressed. Neither does the built-in On Screen Keyboard app in Windows. By contrast, the “Show Keyboard Viewer” tool on macOS does provide this feedback. Currently the OSK in Keyman for macOS behaves like the one on Windows. But we’re curious to know whether Mac users would prefer for it to behave like the built-in one in macOS. This is pretty low priority, but it’s a very easy change - the code is already there to do it, just currently commented out.