Since the El Capitan 10.11.2 upgrade some options are gone in Lego Digital Designer. In the Preferences menu the "Outlines of bricks" and "Advanced shading" are options unselectable.
The annoying part is that without brick outlines it is hard to use for building new things since it is impossible to see where the bricks start.
I have looked at this forum: http://www.eurobricks.com/forum/index.php?showtopic=115313
There is a quoted workaround that suggests deleting these lines from the Info.plist file of the app: LSMinimumSystemVersion 10.4.11
But it does not work for me.
Any other workaround appreciated.