Problem getting started with mac

Hy from Spain! Im having some troubles getting started with serviio. I'm using mac. I downloaded the files from the serviio web and opened them as a random app. I have the same problems on the userguide were said, I mean the icon bouncing on the bar and all that, however, that's not my problem. When I acces the serviio console and try to add locals so I can share my files, all of them appear unclickable, I can see them, but I can't select them. I mean I haven't even selected any file yet, ALL of my archives (video music images...) seem to appear unclickable for a reason I don't know why.
Hope you can help me, thanks!