I really need spacebar to work with XType or otherwise (Workaround availabe)

Please include OPTION key for Mac as well.

Ok. As current workaround for MacOS please use XRUN with the free cliclick tool.

Cliclick Example:

  • kp: space will press the command key and the option key (and will keep them down until you release them with another command)
  • kd:cmd,alt will press the command key and the option key (and will keep them down until you release them with another command)