(01-22-2015, 11:57 PM)The_Rawl Wrote: Never mind haha, I attached the .txt to this post
Thanks very much, this was very illuminating. The HID report I was using was very similar; I've tried a new one based on the Mayflash one, and I'm seeing the same thing i.e. only controller 1 working properly. This means it's either the rest of my code (very likely) or a problem on OSX with multiple HID reports (much less likely, though Linux suffered a problem along these lines for a while, so not impossible).
Does the Mayflash adapter work in PC mode when attached to a Mac? Your original post seemed to suggest that you only tried it in WiiU mode. If it does, it won't appear as a GC adapter in Dolphin, but you should see it in Dolphin when you go to Controller Configuration > Port 1 > Configure in the drop-down device menu, and you should be able to bind buttons and axes as appropriate. In particular, I'm interested in if controllers 2+ work.
Thanks very much for you help again, though.