IamTheGr8 advice me how can I do download?

Answer 1

It's usually a lot easier to answer these questions if you say what you're trying to down load, where you're trying to get it from, and what you're trying to get it to. So "how do I download" isn't going to help much, but a question like "How do I download a BitTorrent stream to my Mac?" will likely get a useful answer...