Macintosh layouts ignore left option key
I selected de-mac
as layout. On Macintosh keyboards, the option keys are the same, contrary on PC keyboards the left option key is the alt-opt key that can be replicated by pressing shift and left option at the same time, so they are different.
It seems the special characters of the mac layouts can only be triggered by the alt-opt key signal, but they also have to be triggered by the alt signal, if those are not the same. I use 10 fingers to type, so I need the left option key to function the same as the right option key.
Interestingly, I was not able to print those special characters by pressing shift + left option key either.