Klaus has written a gui for the latest version of uvc-ctrl! to use it all you have to do is place the uvc-ctrl in the same folder as his app and you can point-and-click-control your uvc cam. if you wish to bundle uvc-ctrl and Klaus’ gui you just copy it into the app. the easiest way to do that is by unpacking uvc-ctrl and uvc-ctrl-GUI in your home-folder, start the terminal (Applications > Utilities > Terminal) and type
mv uvc-ctrl uvc-ctrl-GUI.app/Contents/MacOS/
and then hit enter.
Thank you Klaus for you awesome work!
note libusb is still required.