I have no experience with mac or Iphones.
But if you are taking pictures with a cell phone, you need to go into the phones camera settings and choose the lowest file size picture it will take. Cell phones take humongous size pictures and they time out when loading here.
Another thing you can do is load pictures to an online photo site like imgur.com, then copy the url and paste it here in the text box.
We rather you didn't do it that way because of what photobucket did a year or so ago, but it's is permissible to do so.
This link will explain more and a lot of other things.
http://www.tradgang.com/tgsmf/index.php?topic=160865.0Also sent you a pm with same info.
Ya need anymore help, just pm me or post in here.