Upgrading a PC is so hard. You have all these updates, and disks, and what not. When it comes to upgrading a Mac, it's easy. You just take your old Mac, throw it away, and go buy a new one!
Bungie picks a Heroic Member, a Legendary Member, a Mythic member, at random. Then the chosen three are assigned two numbers from 1-6. Then, they roll a die and whatever number it land's on is one of the numbers that one of the three members were assigned and is now a moderator.
That's how Duardo was chosen.