I swear this was working correctly a few days ago, but now the “launch (KiCad)” window (the one that shows the project) is invisible to the Window Menu. If I open a KiCad project, and click on the Schematic, the only way to get back to the launch window is to move the schematic window out of the way, and click on the launch window it is hiding. I can then click Layout. The same thing happens on Layout - the only windows listed in the Window item on the Menu Bar are Layout and Schematic - the launch window is not listed, and cmd-~ doesn’t; cycle through to it, either.
OK, I just tested it and - it worked!
But not for long. Switching through the windows got it to stop showing the KiCad window.
So, this is a “flaky” problem.