allannc1
Level 1 (0 points)

Q: Internet crashes on iMac for only one certain user...

Hello.  I can't figure this out.  My 27" iMac works fine for two users, but when the third logs in and you open up Safari, the entire internet goes down in the entire house.  Safari just bogs down and stops loading.  Even the airport utility shows internet disconnected.  I switch back to another user and it turns green and internet comes back up.  Ideas?

iMac, OS X Yosemite (10.10.3), 27 Inch Imac on ethernet and Wifi

Posted on Jun 24, 2015 2:00 PM

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allannc1

Q: Internet crashes on iMac for only one certain user...

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  • by Baby Boomer (USofA),

    Baby Boomer (USofA) Baby Boomer (USofA) Jun 24, 2015 2:17 PM in response to allannc1
    Level 9 (57,660 points)
    Jun 24, 2015 2:17 PM in response to allannc1

    How is this user connect to the internet?  Ethernet or Wifi?

    Has this user tried using another browser?  Results?

     

    If on wifi, run the wifi diagnostic test.  Otherwise, run the network diagnostic test.

    System Preferences>Network

    Click the Assist Me button.

    In the next window that pops up, click the Diagnostic button & do the necessary.


    Macintosh HD>System>Library>Coreservices>Applications Double click on the Wireless Diagnostic.app & follow the onscreen instructions. https://support.apple.com/en-us/HT202663 About Wireless Diagnostics


    =============


    CLICKY CLICK---> EtreCheck & copy/paste your report.


    ”EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.”

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    Wave Siggy.gif

  • by Linc Davis,

    Linc Davis Linc Davis Jun 24, 2015 2:24 PM in response to allannc1
    Level 10 (208,037 points)
    Applications
    Jun 24, 2015 2:24 PM in response to allannc1

    Most often BitTorrent, iCloud, Dropbox, or some other cloud-data application is involved in cases of mysterious bandwidth use by a Mac. If you use iCloud, uncheck at least iCloud Drive in its preference pane and see whether there's any change. If you use third-party network backup or file-sync software, disable that. If you use a torrent client, remove it.

    Otherwise, if you're running OS X 10.9 or later, you can see which processes are most active on the network.

    Launch the Activity Monitor application in any of the following ways:

    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

    ☞ Open LaunchPad and start typing the name.

    Select All Processes from the View menu, if not already selected, and also select the Network tab.

    Click the heading of the Sent Bytes column in the process table to sort the entries by bandwidth usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Repeat with the Rcvd Bytes column.