Sometimes there is need to use special national chars. On OSX by default you can use “right alt” key. But this button is more on right than “right command” and its not so convinient to use it. This is why its a good idea to change behaviour of “right cmd” to “right alt”.
To achive that you should:
- Install free software called “karabiner“.
- Go to preferences and find the option “Change Command_R Key (Right Command)”:

- Inside “Change Command_R Key (Right Command)” find “Command_R to Option_R” and select it:

