Duo with MAC is not typing @ from SLOT

If into a Slot the password contains an @ afterwards it is writing different sign.
Example:
Saved into Slot: TEST@OnlyKey
For filling he writes: TEST¬OnlyKey

All special sign do not work.
I changed already the Keyboard Layout, but no solution.
I’m using ONLYKEY with MAC.
some ideas what I am doing wrong?

OnlyKey is sending an ASCII character code when you press a key. Different keyboard layouts interpret the character code differently. The keyboard layout set on the OS will need to match the keyboard layout set on OnlyKey. Here is a useful tool in figuring out what codes match up to what keys on your keyboard: