! Swap alt/option and apple/command.  For consistency and comfort, the
! latter must map to Alt.

remove mod1 = Alt_L Alt_R Meta_L
remove mod4 = Super_L Super_R

keycode 133 = Alt_L Meta_L
keycode 134 = Alt_R Meta_R
keycode  64 = Super_L
keycode 108 = Super_R
keycode 104 = Pointer_Button3

add mod1 = Alt_L Alt_R Meta_L Meta_R
add mod4 = Super_L Super_R