I too couldn't get the mac keyboard working with the latest dolphin emulator.
Dolphin 4.0-9146 is broken with mac keyboard input, no matter how many different settings I tried. I was only able to assign things as "button 1" by clicking my trackpad.
The old Dolphin 4.0 worked for me. I followed https://youtu.be/zOXGUDdp_Mg?t=3m26s to figure out the correct settings.
Under gamecube controller setting:
Keyboard/0/Apple Internal Keyboard / Trackpad
Make sure port 1 says Standard Controller
=
Config -> Gamecube -> Port 1 -> Standard controller.
Dolphin 4.0-9146 is broken with mac keyboard input, no matter how many different settings I tried. I was only able to assign things as "button 1" by clicking my trackpad.
The old Dolphin 4.0 worked for me. I followed https://youtu.be/zOXGUDdp_Mg?t=3m26s to figure out the correct settings.
Under gamecube controller setting:
Keyboard/0/Apple Internal Keyboard / Trackpad
Make sure port 1 says Standard Controller
=
Config -> Gamecube -> Port 1 -> Standard controller.