Can't get the card images into proper destination - Mac OS X

First off, I am on a Macbook Air. I have OS X, Java 7, and VLC. But I don't have Forge under my Application Support so I can't move the picture files anywhere so they are on Forge.
When I open Forge, I have no card text or pictures on the cards themselves. So I went to the Slightly Magic site and followed the instructions. I downloaded the files and went through my hard drive, Library, and opened Application Support but I can't proceed father. I do have Forge in my Applications though. Can anyone help?
I have screenshots of everything attached.
When I open Forge, I have no card text or pictures on the cards themselves. So I went to the Slightly Magic site and followed the instructions. I downloaded the files and went through my hard drive, Library, and opened Application Support but I can't proceed father. I do have Forge in my Applications though. Can anyone help?
I have screenshots of everything attached.