I have the new Apple TV
Will it wake up your macbook pro if its in sleep mode?
I had my macbook pro on sleep mode and the apple tv did not see my computer. I had Itunes on and home sharing on.
When its awake it works great.
I think so long as your MBP is set to wake on LAN it shoudl work
How do i check that and set it?
Under Energy Saver pref in System Preferences, there should be a checkbox for Wake for Network Access.
That's actually kind of a conundrum, isn't it? In order to wake the MacBook, the ATV has to be able to see it on the network, but if it's asleep the ATV won't be able to see it.
If you're using wireless on a laptop, you can still get Wake on Demand to work but there are additional requirements like having recent hardware and leaving the laptop open while sleep or attaching the display to an external monitor.
If you have a desktop connected by ethernet, the Wake on Demand feature used with an Apple TV is pure awesomeness.