Reforger
Level 1 (0 points)

Q: Losing network or internet connection after sleep/wake

I've created this as a new thread as it seems to be more prevalent with Mavericks and the very last update to ML but the problem has been around a while. It does seem to affect all types of Mac though from the other threads I have read and posted to.

 

The problem is essentially this: Intermittently, after a system sleep, the Mac appears to have no network connectivity (local and internet) and for a while the only reliable solution was to force the renewal of the DHCP lease or turning WiFi off and on again, after which the network would be restored.

 

There have been several theories postulated and a number of fixes, such as the DHCP renew, suggested but none of them have lasted for long but I now think I have this fixed as the following been 100% stable on my Mac Pro with wired ethernet connection for the last two weeks with no recurrences. I see no reason why this would not work on other Macs or connection types.

 

The problem seems to lie in the automatic location setting in the network settings, so here's what I did...

 

  1. Network settings - Location - Edit Locations
  2. Add a new location .. "Home" for example
  3. With home selected, click the cogwheel below the network services and choose "Set Service Order"
  4. Reorder the services so your preferred connection type is at the top
  5. After that, select each service in turn (assuming you have a few - like Bluetooth PAN etc)
  6. Make the services you are not using inactive
  7. Apply

 

Please post a reply if this works for you - it's been dragging on far too long and needs sorting out by Apple but if this is a good workaround for people then it will certainly do for now.

Mac Pro (Mid 2010), OS X Mavericks (10.9)

Posted on Nov 7, 2013 11:58 PM

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Q: Losing network or internet connection after sleep/wake

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  • by Diegus83,

    Diegus83 Diegus83 Jul 6, 2015 7:09 PM in response to Timothy Miller
    Level 1 (5 points)
    Jul 6, 2015 7:09 PM in response to Timothy Miller

    I never hear of that problem happening over ethernet. Wired connections are usually much more reliable than WiFi. When I had DSL I remember a setting for "On Demand" meaning the modem would only connect when needed only, maybe yours have something similar?

     

    I knew the problem was on OS X side because the macbook would do the same at home, office or friends houses, but never experience that problem with wired connections.

     

    Any chance to try the mac mini somewhere else?

     

    Sounds like you can let the hard drives sleep without problem, is always a good idea unless you only have solid state ones.

  • by Timothy Miller,

    Timothy Miller Timothy Miller Jul 6, 2015 7:25 PM in response to Diegus83
    Level 1 (79 points)
    Mac OS X
    Jul 6, 2015 7:25 PM in response to Diegus83

    Thanks for your reply, DieGus83. Now that you mention it, it sounds wrong that the problem persisted when connected by Ethernet, and I can't recall with any confidence. It was a couple of weeks ago. I'll try it again and report back. Next step is allowing the hard disk to sleep.

  • by Gandalf The Grey,

    Gandalf The Grey Gandalf The Grey Aug 3, 2015 9:02 PM in response to Timothy Miller
    Level 2 (275 points)
    Aug 3, 2015 9:02 PM in response to Timothy Miller

    Well after owning this iMac and using an older Airport Extreme for 6 years with zero issues, this really bites! Ever since I have upgraded software and bought a new Airport Extreme I am completely p i s s e d off beyond belief! I do believe this is software/hardware related as when ever my computer goes into sleep mode sure enough everything gets bumped off the network. I have my iMac wired in via high speed DSL plugged into a Modem then Airport Extreme and I also use 2 Airport Expresses, every time I have my iMac on and I am upstairs watching TV the computer goes into sleep mode and knocks everything out of whack! I have to reset everything or it will just knock one my my expresses off and I need to reconfigure it to work again! This has been going on for 2 years according to this post, and Apple better get on the frickin ball otherwise they can take their new software and shove it. <<<<<<"Sorry, frustrated rant" Currently using 10.10.4

  • by Hank2007,

    Hank2007 Hank2007 Sep 15, 2015 6:32 AM in response to Reforger
    Level 1 (0 points)
    Sep 15, 2015 6:32 AM in response to Reforger

    Hopefully this post will help those who have a similar problem as I did. It was quite overwhelming to go through  2 years of posts here with individuals having similar problems but maybe not the same exact problem.

     

    I started to notice this problem January 2015. I’ve I had the same MAC desktop computer since 2008. I currently have 10.10.5 (Yosemite).  Every time my computer would go to sleep (even what seemed only to be for 5 minutes) I would have to wait for it to reconnect. This was not a problem for me a year ago. One thing I haven't been able to confirm is whether or not backup programs such as time machine or crash plan will wake up the computer and run. So far, solutions for me have included:

     

    1. My ISP provider was using both traditional IP address servicing and something called IQ7. They came to my house and disabled IQ7. Supposedly this is known to interfere with you-tube.

     

    2. My monitor and computer were both set to 15 minutes. I adjusted my monitor to go to sleep after 10 minutes and raised my computer to 60 minutes. I think this will psychologically fix my problem. In my case both the monitor and PC would go to sleep at the same time after 10 minutes. I’m ok with the monitor sleeping if I leave the computer for a few minutes but I am not ok with loosing my Internet connection.  Since I adjusted the computer sleep to a higher setting than the monitor, I can now be aware that my computer has been dormant for 10 minutes or more and wake it back up before I loose my Internet connection. So this has been the best solution for me.

     

    3. The other solution that I like out of these post is the solution of setting up Location Networking and a priority of which systems to run (Wifi, Ethernet, Bluetooth).  While this doesn’t really have a significant effect on desktops it probably does help with a laptop.

  • by jörgfromzweibrücken,

    jörgfromzweibrücken jörgfromzweibrücken Oct 15, 2015 9:14 AM in response to Reforger
    Level 1 (0 points)
    Oct 15, 2015 9:14 AM in response to Reforger

    I had another well known problem with my iMac: I couldn't wake it up via WLAN with my "Remote"-App on iPhone or with my Apple-TV.

    Your solution has fixed this problem!

    Now, I'm able to wake up my iMac, whenever I want to. Thanks so much!

     

    Please, link your solution also to the threads concerning "wake-on-WLAN"!

  • by endtag,

    endtag endtag Jan 5, 2016 12:30 AM in response to Reforger
    Level 1 (0 points)
    Jan 5, 2016 12:30 AM in response to Reforger

    Thank you Reforger, for finally putting his way too long of lasting headache to rest.

  • by henryreath,

    henryreath henryreath May 22, 2016 11:22 AM in response to Reforger
    Level 1 (4 points)
    May 22, 2016 11:22 AM in response to Reforger

    Amazing.  Can't thank you enough!

  • by halear0,

    halear0 halear0 May 24, 2016 10:08 AM in response to Reforger
    Level 1 (4 points)
    May 24, 2016 10:08 AM in response to Reforger

    No fix worked for me after weeks of trying. I ended up writing a program that basically automatically renews the DHCP when the wifi drops. According to my program, I've had 388 failures in the last 91 hours, and did not notice a single one. This program will need to be customized for your SSID, so email me at mac.wifi.fix@gmail.com and I can get you set up. Right now I'm not selling the program, just asking for donations if it works for you

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