Thank you very much for pointing me to the tutorial!
i downloaded the wallet with Chrome. The problem is that the client does not load fully. The BTCD wallet icon shortly appears in the dock and then closes automatically. For that reason, there have not been created any system files.
I was experiencing the same EXACT symptom, but then I deleted the app from applications folder and re-downloaded with Firefox (not Chrome, to be exact, though people say Chrome works). It then went on to work exactly as the tutorial explains.
I'm not sure what your crash report means, but I am the wrong person to ask such things. Perhaps someone else here can give you a hand with that.
Maybe try deleting the app and downloading it in Firefox, and then starting over. That's the last suggestion I can give you.
You said it worked in 10.7 before for you, so I am not sure why it wouldn't be working now in 10.7 for you. Maybe your computer has a problem. I am not on 10.7, so I can't help you there either. 10.7 is pretty old though.