by RoJeC on 28 Nov 2015, 23:13
Could you please provide the 'last version' number you have (3.3.11?)
It could be you have no write rights, though would be little strange.
An option would be to manually copy the .mappings file to the 'controller' folder. I don't have a Mac, so you have to go to your user profile area of your hdd, or await someone else to provide the exact path.
Groeten,