WASD buddy for Apple keyboards
thingiverse
Fits on top of Apple's aluminum keyboards, as well as on MacBook keyboards. It keeps your fingers on the right keys when playing with the WASD-keys. The model is a tight fit on the keyboard, so you'll probably need to do some filing and/or cutting after printing to make it fit properly.
Download Model from thingiverse
With this file you will be able to print WASD buddy for Apple keyboards with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on WASD buddy for Apple keyboards.