sodquinn
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Q: No internet connection after installing yosemite

After installing Yosemite, I have no internet connection. If I hold option key, my wifi description shows Internet as unreachable,although all my bars are dark and the rest of the settings  look the same. When I connected via cable, it did not show an Ethernet connection. My pc and iPad work fine,so it isn't my carrier.  Anyone else have this problem and know a fix???  Thanks so much for any assistance..

iMac, Mac OS X (10.6.8)

Posted on Oct 17, 2014 5:41 AM

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sodquinn

Q: No internet connection after installing yosemite

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  • by eljefe400,

    eljefe400 eljefe400 Dec 11, 2014 9:21 PM in response to sodquinn
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    Dec 11, 2014 9:21 PM in response to sodquinn

    How to waste 4 hours....

    After upgrade from Mavericks to Yosemite, no internet.  what a pain.. No internet but able to ping my router and other websites by ip address. in fact able to browse to websites by ip address. (74.125.239.38 is google). clearly DNS issue.

    After following some very interesting threads and bricking my machine (recovered by restoring backed up files through terminal). the solution is: a rogue (old) plist file in /System/Library/LauchDaemons. THE FILE "com.apple.mDNSResponder.plist" should not be there in Yosemite or it will kill DNS lookups.

    delete it.. (back up the mDNS files just in case you are afraid to delete files directly)

     

    best of Luck-

  • by tomtoeda,

    tomtoeda tomtoeda Dec 11, 2014 9:50 PM in response to eljefe400
    Level 1 (0 points)
    Dec 11, 2014 9:50 PM in response to eljefe400

    "Installed the update(10.10.1) but this did not fix the "no internet" problem for me. Now I will try deleting those 2 plists as csukal suggested."

     

    This did not do the trick.

     

    Oh, eljefe400, you are genius. It took me only 4 min to delete that mDNS file and now it works as it should. Restarting my Mac does not stop internet connection. Thank you very very much!

     

    tom

  • by jonvn,

    jonvn jonvn Dec 11, 2014 10:15 PM in response to tomtoeda
    Level 1 (0 points)
    Dec 11, 2014 10:15 PM in response to tomtoeda

    No offense, but this fix has been known for two months and is documented on this thread....

  • by tomtoeda,

    tomtoeda tomtoeda Dec 11, 2014 10:16 PM in response to jonvn
    Level 1 (0 points)
    Dec 11, 2014 10:16 PM in response to jonvn

    Oh, I did not realize that. I thought I read the whole thing. I must be too old. But I thank you!

     

    tom

  • by richardfromheathfield,

    richardfromheathfield richardfromheathfield Jan 2, 2015 10:31 AM in response to sodquinn
    Level 1 (0 points)
    Jan 2, 2015 10:31 AM in response to sodquinn

    Have no internet connection, nada. Since Yosemite, I am an oldie and have little/no knowledge of what most people are proposing to resolve this problem.

    Can anybody suggest something by way of an idiots guide.

    Very......... off

  • by dogan_adb,

    dogan_adb dogan_adb Jan 3, 2015 12:06 AM in response to richardfromheathfield
    Level 1 (0 points)
    Jan 3, 2015 12:06 AM in response to richardfromheathfield

    What worked for me was to disable Bonjour protocol in Adium. I've read on some forum that Bonjour causes crash of discoveryd which is responsible for DNS resolving. I had a problem every hour. The ping to IP address would work but not to domain name. However host command would resolve the domain name to IP. After discoveryd was restarted (eg from activity monitor) everything was ok until discoveryd was running on 100% cpu. Then the DNS was not being resolved anymore. Disabling bonjour protocol fixed everything.

  • by VGP,

    VGP VGP Jan 13, 2015 12:58 PM in response to Barry_23
    Level 1 (0 points)
    Jan 13, 2015 12:58 PM in response to Barry_23

    Barry_23,

     

    I followed your advice:

     

    "here you go: https://drive.google.com/file/d/0B9wGd7QYMi6BUmJORjJoZDF2bDg/view?usp=sharing

     

    1. download and unzip

    2. replace content of /System/Library/Launch Daemons with the one you just downloaded

    3. reboot. done."


    I did that with high hopes, and copied the initial  Lunch Daemon folder on the desktop just in case.

    However, the problem I face now is that the rebooting takes forever. I am watching the bar stopped about half-way.

    I am  afraid I am stuck.


    Re-booting in safe mode did not make any difference.


    Any suggestions highly appreciated,


    Viorel

  • by kurka,

    kurka kurka Apr 22, 2015 12:25 AM in response to VGP
    Level 1 (4 points)
    Apr 22, 2015 12:25 AM in response to VGP

    In my LaunchDaemons folder I have only 12 items on my Mac Pro (6 on my MB Air) and none of them are "com.apple". The downloaded folder contains 89 files where all are com.apple. So - is it still any point in updating LaunchDaemons folder? I am afraid that I will loose some stuff and get some new stuff I don't need.

  • by CalZephyr,

    CalZephyr CalZephyr Apr 25, 2015 1:29 PM in response to kurka
    Level 1 (0 points)
    Apr 25, 2015 1:29 PM in response to kurka

    I think the problem some people are having in not finding the files, is they are looking in the wrong directory.  There is a Library/LaunchDaemons directory, and a System/Library/LaunchDaemons directory. The files in question are found in the System/Library/LaunchDaemons directory.

     

    In other words, from the root level, start by opening your System folder, NOT the Library folder.  The Library folder you want is inside the System folder.

     

    In fact, for some folks that are having their computer hang on restart, you may have replaced the wrong LaunchDaemon folder. Just a thought.

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