After much deliberation (and windows giving me hell) I'm finally gonna take the plunge and get a macbook and an iphone next month. I have some questions that I would like to ask: Is there a good simulator or tutorial that I can start using? Can I get a used 16" macbook and still get the updates? Is it safe to get a used macbook online from sites like craigslist, swappa or ebay? Will my current WD 4TB external drive work wih a mac? Can I use an external blu-ray burner with a mac? Is there anything that I need to get before I buy a mac? I'm sorry if these are silly questions. I'm clueless about macs.