lostpig
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Q: wifi issue with iMac running mavericks 10.9.4

I have a 2010 iMac running Mavericks 10.9.4 and am having constant issues connecting with the wifi.  If I turn the wifi off and back on I can load 1-2 pages, then it will not load pages, the connection is dropped.  The problem is not the router, wifi connection is fine on my macbook running mountain lion and on my iPhone.  The settings are correct, it shows that the wifi is connected, PHY mode: 802.11n, Security is WPA2, transmit rate: 117...

Help please...

iMac (27-inch Mid 2010)

Posted on Jul 29, 2014 7:35 PM

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lostpig

Q: wifi issue with iMac running mavericks 10.9.4

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  • by Linc Davis,

    Linc Davis Linc Davis Jul 29, 2014 7:49 PM in response to lostpig
    Level 10 (208,037 points)
    Applications
    Jul 29, 2014 7:49 PM in response to lostpig

    Please test after taking each of the following steps that you haven't already tried. Stop when the problem is resolved. Back up all data before making any changes.

    Step 1

    Take the applicable steps in this support article. The Wireless Diagnostics program generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.

    Step 2

    Disconnect all USB 3 devices. If you don't know which are USB 3, disconnect all USB devices except keyboard and mouse.

    Step 3

    If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. If you find that Wi-Fi works better with Bluetooth disabled, you should use the 5 GHz Wi-Fi band. Your router may not support it; in that case, you need a new router.

    Step 4

    Open the Network pane in System Preferences and make a note of your settings in the Wi-Fi service. It may be helpful to take screenshots of the various tabs in the preference pane. If the preference pane is locked, unlock it by clicking the padlock icon and entering your administrator password. Delete Wi-Fi from the service list on the left by selecting it and clicking the minus-sign button at the bottom. Then recreate the service by clicking the plus-sign button and following the prompts.

    Step 5

    Reset the System Management Controller.

    Step 6

    Reset the PRAM.

    Step 7

    Launch the Keychain Access application. Search for and delete all AirPort network password items that refer to the network. Make a note of the password first.

    Step 8

    Make a "Genius" appointment at an Apple Store, or go to another authorized service center.

  • by mnkyby78,

    mnkyby78 mnkyby78 Aug 31, 2014 2:01 PM in response to Linc Davis
    Level 1 (0 points)
    Aug 31, 2014 2:01 PM in response to Linc Davis

    Hi, lostpig.  I was getting the exact same behavior on my iMac.  Here's what worked for me:

     

    On my router's settings, I had been using "11bgn mixed" for the mode.  I changed that to "11bg mixed" and reset the router.  Now my iMac stays connected!

     

    Not sure why this became necessary; I had been using this iMac with the same router for well over a year without issue.  I installed some updates the other day, and I started seeing the same thing you mentioned: I could load web pages for 10-20 seconds, then it would just fail to access the network.  I couldn't even load the router's page!  I had tried many of the typical suggestions - the Wireless Diagnostics were useless, and resetting the PRAM didn't help, nor did deleting my System Preferences folder... So I hope this fix works for you, too!