Home Sharing when Mac is a sleep?

Your Mac can be woken from sleep mode in order to stream to the Apple TV, however it cannot remain in sleep mode whilst streaming. I am not quite sure what you mean by locked.

A Mac can be woken by an Apple TV over ethernet, it can also be woken over Wi-Fi assuming it has snow leopard or better installed and you are using an airport router.

There are no issues using the Apple TV with a second user account on the Mac.

I'd imagine that's a Security Preference question, and that the OP want to be able to have the Mac wake from sleep but to require a password to login after waking - I believe that the account already logged in will be able to HomeShare happily, just that if security setting is set to require a password after sleep this would give protection from inadvertent usage - in short it should work securely.

AC

On your Mac in system preferences > energy saver, there is a setting to wake for network access, ensure it is checked.

The Apple TV will wake the Mac itself, there is nothing for you to do yourself.

They may well be compatible, but I don't know for certain.

Winston Churchill wrote:

A Mac can be woken by an Apple TV over ethernet, it can also be woken over Wi-Fi assuming it has snow leopard or better installed and you are using an airport router.

Hmmm...

I'm still learning Apple TV (I recently purchased version 3). My WiFi is created by Airport Express. However, the Express is plugged into a Westell Router with an Ethernet cable. My Mac with Lion also uses Ethernet to access the router. The Westell includes a built-in DSL modem to access the Internet.

Should I expect problems if my Mac is sleeping?

Edit...

I can't test right now but I have reason to believe that I'll be OK. The wording in System Prefs implies that Airport is not a requirement.

Your Mac is connected by ethernet, so the situation of being woken over Wi-Fi won't arise, despite your Apple TV being connected to Wi-Fi.

Are you saying that it will not waken or are you saying that I will not have a problem?

You won't have a problem.

Thanks. That's what I had concluded from the text in System Prefs.

Apple uses some proprietary wake technique on Airport devices for wifi which mimics a device still being active.

Wake on LAN over ethernet should be more universally successful.

I am using an Apple Airport Extreme (v 7.6.3) , Apple TV 3rd gen and Apple Mac Pro (5,1) with OSX 10.8.3.

ATV was never able to wake the Mac Pro; neither via Ethernet nor Wifi.

Also, my Mac Book Pro (10,1) couldn't wake up the Mac Pro. Actually I don't know anybody who succeeded in making WOL work under OSX 10.8....

Not sure if you are still having this problem but thought it would be useful just to add how I have got this to work having just purchased ATV3.

I am on 10.8.4, I have a Billion 7800N ADSL router to which is attached a Time Capsule. I have an Airport extreme extending the TC and my ATV3 is connected to the AEBS.

Like everyone else ATV3 would connect to my iMac when it was not asleep and Home Sharing worked well, when it went to sleep, however, ATV3 would not connect. I had Ethernet and Wireless swtiched on on my Mac running iTunes.

The way that the iMac should be woken when ATV tries to connect to it is via a Wake on Demand 'Magic Packet' sent to the iMac over the network (this emanates from the Bonjour sleep proxy on the Airport Base Station). It's documented elsewhere that you need to have 'Wake for Network Access' switched on in Energy Saver prefs and your Airport or Ethernet hardware on the sleeping machine has to be capable of supporting the feature. The issue for me turned out to be that the AEBS is operating in Bridged Mode (I have an Airport Express further extending the network as well) and it does not transmit the magic packet in that mode. I purchased a Home Network plug and connected the ATV3 to that so it was now attached to the network via Ethernet and bypassing the AEBS. I turned Airport off on my iMac and it now works! It can take 30secs to a minute for the ATV3 to make the connection during which time it displays 'Loading iTunes Library' but eventually it establishes a connection.

When you look in the system log you will see 'kernel[0]: Ethernet [AppleBCM5701Ethernet]: Wake reason GIGE - magic packet received'. If, in your configuration you never see this message then the magic packet isn't getting to your iTunes machine for some reason and it will remain in sleep mode.

Hope this helps.

i had this issue after an automatic update.. when i looked in my itunes preferences i seen that i had a passcode set to my homesharing.. once i took that off it didnt do it again.