Request that <CMD/> and <CMD/SHIFT/> cycle through the open windows as is standard Mac convention.
Simlar to <CMD/+> and <CMD/-) being standard zoom commands that Rhino does not recognize.
FWIW I use AltTab (https://alt-tab-macos.netlify.app/) to use alt (option) + tab to switch to windows from any app, including the different windows in Rhino. No need to wait for cycling features being added.
that should work, it does here, maybe you have to change the Mac Os settings? if it works in other apps but not in Rhino you may have some shortcuts defined in Rhino which block it.
or there is indeed some other bug depending on your keyboard layout similar to the following. trying to define a shortcut with cmd + using Austrian layout it seems to take US layout ignoring my os settings and i get [ instead of + with no chance setting + at all.
why would you need that anyway, letting go of your mouse which practically zooms in and out just to zoom in via short cut is quite a flow breaker, but nevertheless that also should work and is actually predefined, but it does not seem to work.
I have no shortcuts defined. <CMD/`> works in every application but rhino.
Dittos with <CMD/+>
Trackpad, no mouse.