Skip navigation

My iMac says its connected to the wireless network but internet is intermittent, why?

2095 Views 12 Replies Latest reply: May 30, 2012 2:05 PM by mturney RSS Branched to a new discussion.
mturney Calculating status...
Currently Being Moderated
May 28, 2012 7:51 PM

My wireless network is connected to my iMac but the internet goes down a lot and I have to reset the wifi up in the menu bar.  It doesn't lose bars at all or say its disconnected.  My wireless printer always works just fine.  None of the other computers in my house have this problem.

iMac (27-inch Mid 2011), iOS 5.1.1
  • Helpstonharv Level 1 Level 1 (40 points)

    There are many hundreds of posts regarding Wifi problems with the iMac. Apple have done nothing to resolve this problem and have ignored all requests for a fix.  Apple customer service is non existent.

  • Micstar Calculating status...

    Have the same problem: 5 other computers/devices work properly (macbook pro, macbook air, ipad, iphone, squeezebox) but the 2011 Imac keeps losing connection. ANNOYING!!!

    Tried to reconfigure my settings and downloaded wlan-update - to no avail.

    Only fix is to set my router to 5 Ghz - this band is not compatible with my squeezebox and iphone... no solution.


    Please let me know if there is a different fix out there...






  • rkaufmann87 Level 8 Level 8 (40,505 points)

    Try a couple of things first, reset both the modem and router. If neither of these help then use DNS Settings Update to reset your DNS settings. Next if that doesn't work download iStumbler (Google it) and look to see if you're competing for the same wi-fi channel with your neighbors. Most routers default to channels 5 or 6 and most people never change the router's channel. After using iStumber for about 30 minutes look to see what channels are being used and if necessary change yours. You will need the router's manual to find the utility to do this.

  • Micstar Level 1 Level 1 (0 points)

    Will try the DNS settings update when I´m at home.

    IStumbler is obsolete because all other devices have no problems - it´s a problem that only occurs on the 27" IMac.

    My router has multiple settings and is "intelligent" to switch to the least crowded channel... (AVM Fritzbox 7270)


    One solution could be to buy the new router 7390 that has dual N and G band built in... this is a 195€ fix...



  • rkaufmann87 Level 8 Level 8 (40,505 points)


    IStumbler is obsolete because all other devices have no problems - it´s a problem that only occurs on the 27" IMac.

    My router has multiple settings and is "intelligent" to switch to the least crowded channel... (AVM Fritzbox 7270)


    One solution could be to buy the new router 7390 that has dual N and G band built in... this is a 195€ fix...



    Your assuming that's the case, to be smart run iStumbler to verify your router's "Intelligence" is still working. Just because only the iMac is affected doesn't mean there isn't an issue with the router. Routers can and do fail.

  • Micstar Level 1 Level 1 (0 points)

    Tried the DNS-trick - nada.


    Checked my wifi via IStumbler: 67% on Channel 9 - all other traffic is less strong (15%).


    I get a constant signal.


    The iMac just loses connection - and I stick to the point: This is a iMac-specific problem.


    Only soulution: Change the network from N to G - as I need N -> I would have to buy a different (more expensive) router with dual Wifi.


    Thanks for your help so far rkaufmann87  - but I guess Apple has to do some coding homework.




  • HRWG143 Calculating status...

    I have similar problem on my iMac. For the past 2 or 3 months the connection to the house wi-fi netwrok fails and cannot be restored except by re-booting. The network works fine with my IPad and my iPhone - so it must be the iMac.

  • rkaufmann87 Level 8 Level 8 (40,505 points)

    It's the router, you said it yourself so it's not an Apple issue. I realize your frustration but sometimes buying inexpensive turns out to be more expensive in the long term.

  • Micstar Level 1 Level 1 (0 points)

    @rkaufmann87 - I don´t get your post and don´t agree with your view.

    Why on earth should the router be the cause for the wifi-lockups?


    5 devices work well - no signal loss there - amongst them:


    a) Macbook Pro 2010 Model

    b) Macbook Air 2011 Model


    ONLY MY Imac 27" 2011 DOESN´T BEHAVE.


    So the router must be the cause for the problem?

    This is not really probable...


    Do you guys out there know what to do? I still have 1-year warranty on the product...



  • HRWG143 Level 1 Level 1 (0 points)

    My iMac wirless connection fails intermittently.

    My iPhone and my iPad (on the same netwrok and using the same router) do not fail.

    There is nothing wrong with the router and so rkaufmann87 is wrong.

    It is NOT the router it is the iMac.


  • Joe Pyrdek Level 1 Level 1 (135 points)

    If you still have an active warranty, and you are reasonably close to an Apple Store or Apple Authorized Service center, my thought is to take it there and let them fix it.  My daughter had a MacBookPro whick decided to no longer connect, or when it did connect it would drop the connection not very long after, on one, and only one wi-fi signal.  The problem sisgnal was the one she needed the most since it was her school's network.  She could still connect to every other wi-fi she tried if they were open and not password protected or if she did know the password needed for the network then she could connect and hold without problems. 


    A trip to the Genius bar put in a new wireless card and now she can connect just fine and hold the connection. 


    Since your iMac is having so many problems, and you are still in warranty, let them fix it.  All the software changes and router changes in the world will not make a piece of hardware suddenly repair itself.


    If you are out of warranty then the lowest cost option might just be a USB Wi-Fi connetion.  Buy the adapter but be sure to check that it is compatiable with 10.7 since I know there are some USB WiFi adapters that do not work with 10.7.  You may have to check the version of the adapter to be sure since I know of one model that the (unlisted version but we can call it "A") does not work with 10.7 but the "B"version is 10.7 compatible. 


    Message was edited by: Joe Pyrdek to add the reference to external USB-WiFi adapters.


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.