I just updated to El Capitan and Audacity 2.1.2
In the earlier version of audacity you could activate the default-key in a settings window by either clicking on the OK-Button (default key) or by pressing the ENTER-key. This is normal behaviour and should work in every program with every system. This is very usefull, especially in audacity, as the user repeats the same action many times with slightly different settings. I did not manage to change the missing behaviour in the Audacity keyboard settings.
Any help is very welcome.
PS: I am new to the forum. I searched the forum for this topic but could not find anything.