Bitcoin QT wallet doesn't sync Possible Duplicate:
  Bitcoin client won’t connect to the network  




I'm using an iMac with OSX 10.8. Bitcoin-Qt which never seems to sync. I have withdrawn coins from Mt.Gox to an address generated by Bitcoin-Qt. While the transaction has registered with Mt.Gox, there is nothing in my wallet. Do I just leave it open until it syncs, start agin or what?
Did you include the transaction fee? If you don't, most miners won't accept it. The same thing happened to me. 

Also, you need to wait until it syncs. You can check if it's been included by going to blockchain.info/address/*the address to which you sent it*. If it worked, the transaction should be listed there.