So Apple just release an update for MainStage ver. 3.2.4. In the release notes it's states, "Arturia Keylab 25, 49 and 88 keyboards are now automatically detected and configured for Smart Controls in MainStage." I do own an Arturia Keylab 88, and MainStage 3.2.4. I've tried (so far), every configuration I can come up with to see this automatic configuration happen, I've been unsuccessful. I'd just like to hear from someone that's been able to implement this "new" feature, and curious as to how it was achieved. Thanks!!