Just bought first mac, attempting to learn C and go on from there. Using the book "Learn C on the Mac" by Dave Mark. I have the apple ID and I registered on Mac Dev Center. When I try to download the dev tools I get 'Access Denied". Are these tools no longer free? I think I have registered all that I need to and it doesn't tell me why I am denied. Can someone tell me what I might be doing wrong ? Thank you.