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Virginia220
Level 1 (0 points)

Q: what is my iMac DNS IP address

What is my iMac DNS IP Address.  I (think) I need it to get my apple TV to work.  I had it working yesterday and today it says NO.  (I did nothing different, except turned it on!!)  It doesn't recognise that I have authorised my iTunes account (several times).

iMac, Mac OS X (10.7.3)

Posted on Apr 12, 2012 9:28 PM

by PAHU,Solvedanswer
PAHU PAHU
Level 6 (16,610 points)
A:

You can determine your Mac's IP address by opening Sytem Preferences, selecting Network and then selecting the interface you are using to connect to your home network (either Ethernet or WiFi). As for its DNS IP address, the Mac will not have its own DNS address. This will typically be the IP address of the wireless router, if WiFi is being used, or your ISP.

 

For your Apple TV to see the Mac, this will use Bonjour to locate the Mac on the local network. So the important thing is that your Mac and the Apple TV are set to the same IP subnet. This is usually the first three sets of numbers in your IP address, while the last number is known as the network address. For example, a Mac with an IP address of 10.0.1.4 has an IP subnet of 10.0.1 and a network address of 4. For other devices using Bonjour to communicate with this Mac, they also need an IP subnet of 10.0.1 but a different network address to 4.

 

The other important IP address setting is the router address, aka gateway. For all devices to communicate with each other on a local network, they must have the same router address, which is the IP address of the wireless router or Ethernet switch.

 

Now I don't have an Apple TV so I don't know the network settings menu but I would expect that it is set to DHCP, meaning that it is relying on the router to provide it with an IP address. The theory would then go that you would also set the Mac to DHCP so that the router can allocate a dedicated IP address to the Mac and Apple TV and any other device on your network. If any device is set to manual assignment then this could be your issue. Are you able to confirm what network settings the Mac and Apple TV are using and post back here?

Posted on Apr 13, 2012 1:08 AM

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Virginia220

Q: what is my iMac DNS IP address

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  • by PAHU,Solvedanswer

    PAHU PAHU Apr 13, 2012 1:08 AM in response to Virginia220
    Level 6 (16,610 points)
    Apr 13, 2012 1:08 AM in response to Virginia220

    You can determine your Mac's IP address by opening Sytem Preferences, selecting Network and then selecting the interface you are using to connect to your home network (either Ethernet or WiFi). As for its DNS IP address, the Mac will not have its own DNS address. This will typically be the IP address of the wireless router, if WiFi is being used, or your ISP.

     

    For your Apple TV to see the Mac, this will use Bonjour to locate the Mac on the local network. So the important thing is that your Mac and the Apple TV are set to the same IP subnet. This is usually the first three sets of numbers in your IP address, while the last number is known as the network address. For example, a Mac with an IP address of 10.0.1.4 has an IP subnet of 10.0.1 and a network address of 4. For other devices using Bonjour to communicate with this Mac, they also need an IP subnet of 10.0.1 but a different network address to 4.

     

    The other important IP address setting is the router address, aka gateway. For all devices to communicate with each other on a local network, they must have the same router address, which is the IP address of the wireless router or Ethernet switch.

     

    Now I don't have an Apple TV so I don't know the network settings menu but I would expect that it is set to DHCP, meaning that it is relying on the router to provide it with an IP address. The theory would then go that you would also set the Mac to DHCP so that the router can allocate a dedicated IP address to the Mac and Apple TV and any other device on your network. If any device is set to manual assignment then this could be your issue. Are you able to confirm what network settings the Mac and Apple TV are using and post back here?