I haven't read through all the post but, I can tell you some of the posters above are very knowledgeable and can offer a lot of good advice and support. The problem I'm sure is solvable with a little time and patience. I can't help but wonder....how was the cat before you moved and, how did you feel about him then? For all you know someone had a cat that lived in the apartment before and your cat is reacting to that. From what I can tell something has triggered his behavior. Some background on how he was and, how you felt about him before the move may be helpful.