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Do I have to wake up a Power Nap enabled Mac to stream media off of it or can I leave it sleeping?

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I believe Power Nap is only relevant if you use flash-based storage. Are you streaming off an SSD drive? –  user479 Jul 26 '12 at 5:08

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up vote 2 down vote accepted

This seems to work on my AppleTV 2 and MacBook Air.

Last night I turned on the AppleTV to browse my main library on a Mac Mini and the MacBook Air library showed up as well, even though the lid was closed and the computer was asleep.

I have not experimented enough to know if this works with the power adapter unplugged.

This was a very pleasant, but apparently undocumented, feature to discover. Perhaps it arrived in the most recent AppleTV update.

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