Can you get a free dragon amulet on a mac

Yes, but you'll have to "work" for it.
Search "battleon games" on Google and create a Master Account on the site if you don't already have one. There you can earn Battleon Points that you can use to buy upgrades. You can earn free points by filling out surveys and offers. I recommend using the option called Peanut Labs. If you complete 5 offers within 24 hours, you'll get 600 points in addition to the ones you already earned! (Note: one Dragon Amulet costs 4000 points)

It works! I now have a Guardian account and 6 Dragon Amulets, all through filling out surveys and offers! :)