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Mac Pro won't connect to Ethernet

2051 Views 32 Replies Latest reply: Jan 26, 2013 11:34 AM by Spydereleven RSS
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skyofblu Calculating status...
Currently Being Moderated
Dec 11, 2012 2:31 PM

My Mac Pro will not connect to the internet, but it connects to Wifi via my comcast modem.

 

the modem was switched out today, but I couldn't connect before that - which is why they came and replaced my modem.

 

The lights in the Diagnostics window say:

 

Ethernet: connected

 

Wifi: connected

 

ISP: Fail

 

Internet: Fail

 

Server: Fail

 

Any ideas?

Mac Pro, Mac OS X (10.7.5)
  • Linc Davis Level 10 Level 10 (107,860 points)
    Currently Being Moderated
    Dec 11, 2012 5:03 PM (in response to skyofblu)

    Don't try to connect to the same network with Ethernet and Wi-Fi at the same time.

  • Linc Davis Level 10 Level 10 (107,860 points)
    Currently Being Moderated
    Dec 12, 2012 8:59 PM (in response to skyofblu)

    I'm not sure I understand. You couldn't connect to the Internet, so Comcast came to your premises and replaced the modem. Did the technician test the connection? Were you ever able to connect through the new modem, and if not, what did the technician or Comcast support tell you?

  • Linc Davis Level 10 Level 10 (107,860 points)
    Currently Being Moderated
    Dec 14, 2012 3:03 PM (in response to skyofblu)

    When Ethernet is connected, is it at the top of the connection list in the Network preference pane? If not, move it to the top and Apply the change.

     

    When it is at the top, select Advanced TCP/IP. What values are shown for the following:

     

    Configure IPv4

    IPv4 Address

    Subnet Mask

    Router

  • Linc Davis Level 10 Level 10 (107,860 points)
    Currently Being Moderated
    Dec 16, 2012 7:13 PM (in response to skyofblu)

    What do you see when you're connected via Wi-Fi?

  • Grant Bennet-Alder Level 8 Level 8 (48,110 points)
    Currently Being Moderated
    Dec 16, 2012 7:15 PM (in response to skyofblu)

    Close that window and save changes, then re-open it.

     

    Any Address showing for IPv4 ??

     

    If nothing, many people have success by using the ( Assist Me ) button, choosing Assistant, and setting up their Ethernet from scratch, including a new "Location" (not just modifying the existing one).

     

    DHCP Client ID is seldom used, and not required for your setup.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • Linc Davis Level 10 Level 10 (107,860 points)
    Currently Being Moderated
    Jan 16, 2013 6:00 PM (in response to skyofblu)

    Did you try the steps suggested in those threads?

  • Linc Davis Level 10 Level 10 (107,860 points)
    Currently Being Moderated
    Jan 17, 2013 10:59 AM (in response to skyofblu)

    Boot into Recovery by holding down the key combination command-R at the startup chime. Release the keys when you see a gray screen with a spinning dial.

     

    Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.

     

    From the OS X Utilities screen, select Get Help Online. A clean copy of Safari will launch. No plugins, such as Flash, will be available. While in Recovery, you'll have no access to your saved bookmarks or passwords, so make a note of those before you begin, if they're needed for the test.

     

    Test. After testing, reboot as usual and post the results.

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