1 2 Previous Next 15 Replies Latest reply: Nov 16, 2012 7:40 AM by etresoft
Studio Engineer Level 2 Level 2 (445 points)

I have been using Macs since '95

 

I have Mountain Lion installed on at least 6 CPUs.

The latest CPU to the collection is the Retina MacBook Pro...

 

The Retina wont stay connected to a network for longer than about 10 minutes.

Then connections stops althought the Finder STILL displays the network shares.

 

If I turn on Bluetooth on the Retina I cannot connect to anything.

 

Generally it is impossible to have a reliabe network using Mountain Lion

 

At times it is blazing fast (1% of the day) the rest is just filled with network drops and slowdowns.

 

I use the Airport Extremes for my network.

 

I have tried anything.. Using another router, another W-LAN router, altering MTUs disalbling bluethooth and ALL peripherals.

New Network Locations. You name it..

 

NOTHING I do will render a network with even 40% stability.

 

This is the first time in almost 20 years that I am contemplating switching to Windows.

 

 

Please --- If someone has ANY idea of what is going on this most erratic OS that Apple has ever release, please tell me...

 

I am at a complete loss here.

 

Thanks

  • 1. Re: I am so disappointed with Networking Stability in Mountain Lion
    sig Level 8 Level 8 (35,770 points)

    What security protocol are you using? Have you tried changing the channel on the router? Is there 2.4 ghz equipment in the proximity that may be interfering with your reception? Are you using 2.4 or 5.0 ghz for the Macs?

  • 2. Re: I am so disappointed with Networking Stability in Mountain Lion
    Studio Engineer Level 2 Level 2 (445 points)

    Hi -

     

    and thank you for taking the time to chime in ;-)

     

    1) WPA2 Personal

    2) 802.11n only (5GHZ) --- I have tried ALL options in the "Radio Mode" of the AIrport Extreme - makes no difference.

     

    3) There is no 2.4 GHZ equipment interferance

  • 3. Re: I am so disappointed with Networking Stability in Mountain Lion
    sig Level 8 Level 8 (35,770 points)

    Modem. What brand? What kind of Internet service? Cable? DSL? Is the modem connected as a primary or split?

  • 4. Re: I am so disappointed with Networking Stability in Mountain Lion
    Studio Engineer Level 2 Level 2 (445 points)

    Apple Airport Extreme... (Lets take the web out of the oquasion. I am trouble shooting with the Web Modem Bypassed.

     

    This Problem exists between 5 Macs connected via Airport and Ethernet cables all going into the AIRPORT Extreme.

  • 5. Re: I am so disappointed with Networking Stability in Mountain Lion
    VikingOSX Level 5 Level 5 (5,500 points)

    There is a 4th gen AEBS in the room with me serving 2.4 and 5Ghz to Windows, Mac, iPad, iPhone, and Android clients. No observed instability wireless or wired. The wireless power was actually reduced as a courtesy (what was I thinking) to the neighbors.

     

    In the outside chance that you have an Ethernet chip degrading (or duplicated hostname or IP address) in one of those Macs, you might need to systematically remove each one, and re-evaluate network stability as a result.

     

    Additional questions for insight:

     

    1. Airport Extreme firmware current?
      1. What generation AEBS?
    2. Access to Airport Utility v5.1 (increase wireless power)?
      1. ML invalidated this app, so need Lion or earlier.
      2. Airport Utility v6 unable to change wireless power.
    3. Network stability issues only with wireless, or wired too?
      1. Wired is CAT5E or better?
    4. IP Address collisions
      1. Duplicate IP addresses?
      2. Static IP within DHCP IP assignment range?
      3. Duplicate host names?
      4. /etc/hosts modifications?
    5. Duration of DHCP renewal window?
  • 6. Re: I am so disappointed with Networking Stability in Mountain Lion
    Studio Engineer Level 2 Level 2 (445 points)

    1 = Latest / AEBS 3 years old

    2 = No

    3 Both (I.e. In the Finder I can mount i.e. the Mac.local then I ummount and two seconds later when trying to mount again, I get the error "Connection Failed" -- Then 1 minute later I can connect again. Totally erratic.

    (Wired CAT5E)

    4 a = NO

    4 b = Dynamic

    4 c = no

    4 d = no

    5 = 100 days... But I have tried anything from 1 hour to 1 day etc etc etc

     

    Thanks for chiming in ;-)

  • 7. Re: I am so disappointed with Networking Stability in Mountain Lion
    etresoft Level 7 Level 7 (24,270 points)

    Have you considers the possibility that your Airport Express has failed. To suggest that there is something inherently wrong with Mountain Lion is just silly. Wouldn't 5 or 6 million of us have noticed something?

  • 8. Re: I am so disappointed with Networking Stability in Mountain Lion
    etresoft Level 7 Level 7 (24,270 points)

    Considered - can't edit on an iPad

  • 9. Re: I am so disappointed with Networking Stability in Mountain Lion
    Studio Engineer Level 2 Level 2 (445 points)

    I have 3 Airport Extremes... Unless they all fail at the same time, this is NOT the problem...

     

    Ehm... goto an apple store and you will find their network to be highly erratic as well...

     

    Mountain Lion is NOT relible when it comes to networking. At all..

     

    Even the Apple Care folks told me "we are AWARE of problems with networking in Mountain Lion"

     

    Perhaps YOU are not utilitzing networking on a prefessional level, meaning IT HAS TO WORK ALL THE TIME ;-)

  • 10. Re: I am so disappointed with Networking Stability in Mountain Lion
    VikingOSX Level 5 Level 5 (5,500 points)

    Are all of your Mac operating systems at 10.8.2 + supplement, or current for their OS X version?

     

    Power all the routers and networked Macs/peripherals off.

     

    Power on one router, and two Macs only for that network segment. Do your network instability problems remain, or has this combination eliminated the problem? I still think something is perturbing your network, and process of elimination may require time investment, and isolate the problem.

  • 11. Re: I am so disappointed with Networking Stability in Mountain Lion
    etresoft Level 7 Level 7 (24,270 points)

    Studio Engineer wrote:

     

    I have 3 Airport Extremes... Unless they all fail at the same time, this is NOT the problem...

     

    Do you have them all set to the same channel or something?

     

    Ehm... goto an apple store and you will find their network to be highly erratic as well...

     

    Mountain Lion is NOT relible when it comes to networking. At all..

     

    Nonsense. I don't go to an Apple Store all that often. My Mountain Lion machines work fine in all other places.

     

    Even the Apple Care folks told me "we are AWARE of problems with networking in Mountain Lion"

     

    Nonsense.

     

    Perhaps YOU are not utilitzing networking on a prefessional level, meaning IT HAS TO WORK ALL THE TIME ;-)

     

    It does work all the time.

  • 12. Re: I am so disappointed with Networking Stability in Mountain Lion
    Studio Engineer Level 2 Level 2 (445 points)

    Hi Viking,

     

    thanks for chiming in.

     

    All running on latest software updates.

     

    I did what you suggested. But no use. Still keeps dropping at random.

     

    Even tried connecting two macs directly. STILL network drops from time to time...

     

    Even have this: I am watching a movie on a network share... WHILE watching Mountain Lion will throw a dialog that the connection to the share has been lost. However, the Finder STILL shows the share and I can browse it and STILL watch my movie.... This OS is erratic in networking and that at its best.

     

    Wow

  • 13. Re: I am so disappointed with Networking Stability in Mountain Lion
    Studio Engineer Level 2 Level 2 (445 points)

    You are not helping at all. You are venting.

    Would have thought someone with your amount of posts would at least have had one constructive suggestion,

    Please refrain from adding posts to this thread. I am not reading them nor am I taking them seriously.

     

    And man, if NO ONE would have those problems WHY on earth does THIS follwing thread have 32,000 VIEWS....

    Get your facts straight.... PLEASE

     

    https://discussions.apple.com/thread/4136718?tstart=0

    etresoft wrote:

     

     

    Studio Engineer wrote:

     

    I have 3 Airport Extremes... Unless they all fail at the same time, this is NOT the problem...

     

     

     

    Do you have them all set to the same channel or something?

     

     

     

    Ehm... goto an apple store and you will find their network to be highly erratic as well...

     

    Mountain Lion is NOT relible when it comes to networking. At all..

     

     

     

    Nonsense. I don't go to an Apple Store all that often. My Mountain Lion machines work fine in all other places.

     

    Even the Apple Care folks told me "we are AWARE of problems with networking in Mountain Lion"

     

    Nonsense.

     

    Perhaps YOU are not utilitzing networking on a prefessional level, meaning IT HAS TO WORK ALL THE TIME ;-)

     

     

    It does work all the time.

  • 14. Re: I am so disappointed with Networking Stability in Mountain Lion
    VikingOSX Level 5 Level 5 (5,500 points)

    Well, I am not having a genius moment on a magic fix. Grrrr.

     

    Within the Network Preferences > Advanced > Proxies setting on each Mac, can you check that the following are not selected within Ethernet and Wi-Fi services:

     

    Auto Proxy Discovery

    Automatic Proxy Configuration

     

    It has been reported that unchecking these protocol choices resolves some network instability issues. Here is a screen shot of my panel:

     

    Screen Shot 2012-11-16 at 5.02.18 AM.png

     

    For wireless instability, it has been shown that creating a new Location in Network Preferences, then connecting through that Location, and then renewing DHCP eliminates wireless instability. I would not, however, follow their secondary advice on changing your default MTU value.

     

    Also, do you have any Virtual Private Network (VPN) connections active when you experience network instability issues?

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