Q: how did you get many keyboards working with your keyboard maestro, keyboard maestro
A: step 1, use Karabiner, but instead of swapping keys, disable all the keys (set every key to vk disable). that will be like 100 items to add and 2 pop-up menus each, so i recommend using kbm for assistance to get through it. disable the keys on every extra keyboard (not your main keyboard) then, in keyboard maestro, when you add a trigger, instead of using "HotKey" trigger (that would be for your regular keyboard) use "USB device key". it should come right up. as long as the keyboards aren't the exact same model, they will be recognized as different. Actually, i'm pretty sure that they will all be recognized as different no matter what. i've never actually tried to use 2 that are the identically exact same model so i'm not sure, but i'm pretty sure it would be fine. then, one slight problem you may run into, next time you restart your computer, if the keyboards don't work when you restart, just sleep the computer real quick and wake it up. then they should work. another side warning, if you do get this working, watch out for the binge-buying of keyboards that may occur as a result