Minecraft – How to duplicate heads on a MacBook Pro

Heads face towards you when you place them. If you want to place a head face left, move to the left of the spot you're going to place it in before you place it. This is the same as almost anything else that has an orientation, so I assume you want to turn it around with commands.

To rotate a head with commands, the tag you need to edit is the "Rot" byte. For example, to make a head below you turn west, use this command:

/blockdata ~ ~-1 ~ {Rot:4b}

Here's a full list of what direction each number reperesents:

• 0: south
• 1: south-southwest
• 2: southwest
• 3: west-southwest
• 4: west
• 5: west-northwest
• 6: northwest
• 7: north-northwest
• 8: north
• 9: north-northeast
• 10: northeast
• 11: east-northeast
• 12: east
• 13: east-southeast
• 14: southeast
• 15: south-southeast

This is a mod called HeadCrumbs.

So Infinity 1.0.2 added the HeadCrumbs mod, which adds a bunch of humanoid mobs with skins of minecraft "celebrities".

I'm afraid there's not a lot of documentation to be found about them, but assuming they are supposed to act somewhat like a player, using an iron door or easy difficulty are reasonable guesses for how to keep them out.