Mountain lion wifi problems

^ setting the beacon period didn't help.

Mne was already set to 100. then i set it to 200 and did the test by downloading a 1GB file in Safari. After 2 minutes the connection gets interrupted and the download fails - as usual.

I also experimented with another router: Connected an Aiport Extreme. I tried various settings, NAT vs no NAT, 5Ghz network vs normal, all to no avail, file download would fail.

I am using the iOS update file to test because that's how I noticed this in real life. I can't download an iOS update via iTunes, it always fails before it's done. Usually after 1-2 minutes but with the AirportExtreme I got all the way to 700MB before it died.

Download link I use for testing is here:

iPhone 5 (GSM) 6.1.2

My workaround is to use a download manager - I've monitored my network speed (MenuMeters) and with the download manager the connection drops as well, but the download manager is able to continue the download and eventually downloads the whole file. The period when the network is actually dead is between 1 - 10 seconds.

If you have a wifi problem that concerns you then be concerned enough to start your own thread rather than posting randomly in others.

It seems that all you want to do is complain, so go here and do it. Until you show any interest in solving your problem you are just one more ranter incapable of (or unwilling to) provide attribution for what they post.

Using the spell checker would also be to your advantage.

The most reliable (temporarily) solution I use is to reset the DNS cache : http://support.apple.com/kb/ht5343

Sometimes I do a restart, reset the DNS chache and again a restart. This helps (for the moment).

The renew DHCP trick works for maybe 36 hours. To all of you who think you solved your problem, you're wrong. It will be back.

Here's what I notice:

1. The more apps I have open that pass data in the background (mail, itunes, iphoto, etc), the quicker it fails. Rarely are either any Office apps or Adobe CS6 apps affected.
2. When WiFi won't connect, the clock stops. This means that this is far larger problem than WiFi. It is causing a partial system freeze.
3. Whatever apps I have open that pass data must be force quit when WiFi won't connect so that I can restart. They do not appear to notifying Apple as usual so the engineers are likely missing thousands, if not millions, of bug reports.
4. Windows 7 under Parallels and its apps usually continue to work and use WiFi unless I was passing data between OSX and W7. Therefore, we can conclude that is not hardware, it is Mountain Lion.
5. While it does lose it occaisionally while working, it is most likely to loss it when it wakes from sleep (with or without the lid closed). I now close all apps before shutting the lid. I live in fear if I walk away from the computer and when I return the screen is black and white light is pulsing.

Because of cloud integration, this is unacceptable. Mountain Lion has crippled my 2yo MacBook Pro. Mountain Lion is Apple's Windows Vista. It has clearly not been tested on relevant hardware. I have told everyone that UNDER NO CIRCUMSTANCES should they install this upgrade. I have several friends who are long time Mac users, as am I, who say the same. By not fixing this, you are risking your reputation. If this is not fixed soon, I will be forced to buy a new laptop. It won't be a Mac, largely because it would have to be a mountain lion device and I don't trust it, even on a new machine.

PS, my family owns 2 imacs, 4 macbook pros, 3 iphones, 3 ipads (and assorted devices in the "archive"). Fortunately, I only upgraded my laptop. The only Windows we own runs in parallels. Are you really going to make me buy a Windows PC?

I have exactly the same problem.

1. After wake up. Wifi is lost.
2. Apps starting to hang and doesent respond showing up as red in the cmd-alt-esc tool.
3. Must press force restart.

If of any interest. Here is a wifi-report:

https://dl.dropbox.com/u/43651270/WiFiDiagnosticReport-20120915-1301.tgz

This happens on at least 3 diferent wlans i usualy connect to.

My mac is like this:

Modellnavn: MacBook Pro

Modellidentifikator: MacBookPro8,2

Prosessornavn: Intel Core i7

Prosessorhastighet: 2 GHz

Antall prosessorer: 1

Totalt antall kjerner: 4

Nivå 2-buffer (per kjerne): 256 kB

Nivå 3-buffer: 6 MB

Hukommelse: 4 GB

Start-ROM-versjon: MBP81.0047.B27

SMC-versjon (system): 1.69f3

Some wifi-info from my macbook under:

Programvareversjoner:

CoreWLAN: 3.0 (300.9)

CoreWLANKit: 2.0 (200.10)

Menytillegg: 8.0 (800.7)

configd-programtillegg: 8.0 (800.15)

Systeminformasjon: 8.0 (800.1)

IO80211-familie: 5.0 (500.15)

Wi-Fi-diagnostikk: 1.1 (110.26)

AirPort-verktøy: 6.1 (610.31)

Grensesnitt:

en1:

Korttype: AirPort Extreme (0x14E4, 0xD6)

Firmwareversjon: Broadcom BCM43xx 1.0 (5.106.98.81.21)

MAC-adresse: 28:cf:da:f3:01:70

Lokalitet: ETSI

Landskode: NO

Støttede PHY-moduser: 802.11 a/b/g/n

Støttede kanaler: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140

Våkne ved trådløs: Støttet

AirDrop: Støttet

Status: Tilkoblet

Gjeldende nettverksinformasjon:

Blesternett:

PHY-modus: 802.11n

BSSID: 00:24:36:ab:59:28

Kanal: 108,1

Landskode: NO

Nettverkstype: Infrastruktur

Sikkerhet: WPA2 Personal

Signal/støy : -50 dBm / -88 dBm

Overføringshastighet: 216

MCS-indeks: 13

Andre lokale Wi-Fi-nettverk:

Blesternett:

PHY-modus: 802.11n

BSSID: 00:24:36:ab:59:27

Kanal: 11

Landskode: NO

Nettverkstype: Infrastruktur

Sikkerhet: WPA2 Personal

Signal/støy : -57 dBm / -78 dBm

Finally I have my Wi-Fi working again in Mountain Lion

I had posted before that I had tried various fixes without success but the following steps worked for me when I did them in the order below.Hope this may be of help to others.

1. Make sure Wi-Fi is turned on but with no current connection to any Network

2. Delete all Airport/Router Network Passwords that are stored in Keychain that are associated with your wireless device

Do a search for Keychain with Apple 'Spotlight

• Open Keychain Access and delete all Network Password certificates that are related to your wireless account

• You may have to enter your administrator password to unlock and delete files then exit

3. Add a New Network Location

• • Open System Preferences from the  Apple menu and choose “Network”
• • Pull down the “Location” menu and choose “Edit Locations
• • Delete all locations listed except Automatic
• • Click the [+] button to add a new location, name it whatever you want (I used my chosen network name) then click Done

4. Join Other Network

• • Back in Network System Preferences screen make sure Wi-Fi is selected
• • Click the “Network Name” menu and select 'Join other Network' enter your Network name and enter your password (if needed) in the Security bar.

(I picked 'WPA personal' for my security setting)

• Make sure Remember this Network is checked and click join

At this point my wireless network was active

5. Renew DHCP

• • From the Network panel, click on the “Advanced” button in the lower right corner, then click the “TCP/IP” tab
• • Make sure “Configure IPv4:” is set to “Using DHCP” and then click the “Renew DHCP Lease” button, click “Apply” when prompted
• • The appropriate DHCP settings should be renewed from the connected router, click 'OK' and exit out of System Preferences.

I also had read that the program Growl may cause issues so I have this turned off

After completing these steps in this order I now have my Wireless back and reconnects automatically after sleep and after 24 hours no dropped connections.

I had the same problem as did my wife with dropped wifi connections after sleep in lion and mountain lion

I fixed the problem by following the steps below for both macbooks and still working great over a month later

Hope this may be of help

Our router is an Airport Extreme base station

1. Make sure Wi-Fi is turned on but with no current connection to any Network

2. Delete all Airport/Router Network Passwords that are stored in Keychain that are associated with your Wireless device

Do a search for Keychain with Apple 'Spotlight

• Open Keychain Access and delete all Network Passwords certificates that are related to your wireless account

• You may have to enter your administrator password to unlock and delete files

• Exit

3. Add a New Network Location

• Open System Preferences from the  Apple menu and choose “Network”
• Pull down the “Location” menu and choose “Edit Locations
• Delete all locations listed except Automatic
• Click the [+] button to add a new location, name it whatever you want (I used my chosen network name) then click Done

4. Join Other Network

• Back in Network System Preferences screen click on Wi-Fi on left
• Click the “Network Name” menu and select 'Join other Network' enter your Network name and enter your password (if needed) in the Security bar. (I picked 'WPA personal' for my security setting)
• Make sure Remember this Network is checked and click join

at this point my wireless network was active

5. Renew DHCP

• From the Network panel, click on the “Advanced” button in the lower right corner, then click the “TCP/IP” tab
• Make sure “Configure IPv4:” is set to “Using DHCP” and then click the “Renew DHCP Lease” button, click “Apply” when prompted
• The appropriate DHCP settings should be renewed from the connected router, click “OK” and exit out of System Prefs

After completing these steps in this order I now have my Wireless back and reconnects automatically after sleep and after 5 weeks no dropped connections.

I've tried almost everything and this simple thing finally works for me (tested for more than 1 day):

Solution: move from WEP to WPA2-Personal authentication 🙂

1. Make sure you have WPA2 setup on your wireless router
2. Forget the previous wifi connection on your iMac; you need to delete it
3. Access and add your Wifi router again; verify by going to "System Preferences" > "network" > "Wi-Fi" > "Advanced" > "Preferred Networks" that under the security tab it shows WPA2 Personal.

My 21.5" mid-2011 iMac used to work fine with WEP under Snow Leopard and then Lion but started giving connectivity problems after moving to Mountain Lion. Usually disconnecting and re-connecting to Wifi worked.. sometimes restarting router.. but it was super embarrasing to me (as a fanboi) whenever my wife accessed my machine and there wasn't any network.

BTW, I'm running 10.8.2 and also updated the supplemental update 1.0

Hope it helps you as well.

I still love my iMac and Apple! 🙂

Just adding to the pile of people who're having WiFi issues with Mountain Lion. I have a late 2008 MacBook Pro 15". Intermittent WiFi connectivity, sometimes with download speeds as low as 0.5 Mbps (or no connectivity at all, despite excellent signial reception)...essentially the same problem that everyone is having.

Here's what I've tried so far, all have failed:

• Cleared all router/Airport entries in Keychain, "forgot" all Prefered Networks, created new Location, renewed DHCP
• Changed MTU to 1453
• Router was already set to WPA/WPA2
• Updated firmware on router

Anyone have any new homegrown solutions?

I'm at the point where I've stretched an Ethernet cable across my living room just to submit this post. Obviously, no one at Apple will read my post, but my hope is that I can at least add to the crowd of affected people to help draw Apple's attention to this problem. At the very least, they could be professional about it and acknowledge that there is a problem, regardless of how it's being solved (or not being solved). I would gladly give Apple all of their Mountain Lion swiping, sharing, and alerting in exchange for functioning WiFi.

This one didn't work for me, and neither did:

Resetting SMC

Resetting PRAM

Manually removing prior passwords from keychain and trying again

Manually re-entering the passwords through the airport settings

Renewing DHCP from network settings

Etc....

Something slightly more drastic did the trick:

1. Open Network Preferences
2. Turn off WiFi
3. In the drop down at the top for Locations, remove all Locations except for the Automatic location using the Edit Locations option
4. In the list on the left of network interfaces, delete all interfaces INCLUDING the WiFi adapter
5. This appears to completely clean out "something" - my guess is items in the TCP/IP stack get messed up as part of the 10.8.2 upgrade
6. Now using the + icon in the list at the left, add a new network interface in for the WiFi type and name it Wifi
7. Now try connecting to your WiFi route of choice

This did the trick for me. Things had been flaky since the SMC upgrade in 10.8.2 last night and now they're rock solid again.

Hope this helps someone. Reading forums on my iPhone to try to debug the problem hasn't been pleasurable.

Jason

I'm still not convinced that everyone here is experiencing the same issue.

If I am understanding correctly, the major problems presented are:

1. slower than expected network performance, dragging, etc.
2. no auto-connect to wireless out of sleep (due to service order issues)
3. random dropping of wireless signal

Most of these questions have been answered, but I think they require some further investigation and definition for us to really know for sure.

With problem 1, I'm not convinced that changing your network security protocols is really going to help the issue. I am on a WPA network at my home, and at work WPA2, and I am still having slow performance in both places. Not only that, but most of my users on Mountain Lion are experencing the same thing on WPA2 Enterprise network. In reading further, I am wondering if some of the complaints we are seeing are specific to Safari. I don't seem to be having problems with Firefox loading pages, and many other people are claiming to have better success with Chrome than Safari right now. Also, file downloads run at an acceptable speed. I'm not sure what other Internet lagging issues people may be having. Can anyone else speak to this?

With problem 2, many people (Including Bruno above) have it right when resetting the service order. Once I did that on my Macbook Retina, I saw the auto-connect issues go away..... UNTIL recently. The problem has resurfaced in a very strange and different way. The problem is no longer that it will not attempt connecting to wireless. For example, coming out of sleep, my laptop does not connect to my first listed wireless network anymore. This was not the case a couple of weeks ago. I have not seen a pattern yet, as it seems to be random and happened both at home and work (in some cases trying to connect to an open wireless network that I've never used). Also, resetting the service order has not resolved my users issues with wireless dropping, so it has nothing to do with Bluetooth interference in that case, especially considering we are using a 5gHz band. Perhaps, this problem is totally unique from everyone else's. However, the one particular user in question was having the issue straight out of the box, 15" Macbook Pro Retina. I've tried all the tricks including a reinstall, so I did my due diligence.

With problem 3, I'm still not convinced this is not a design flaw in 2012 Macbook Pro Retina machines. Everyone has wireless issues, and many are unique or specific to their home configurations. However, what I have seen (and confirmed) is that some users with the MBPretina are experiencing these issues across networks of different types (WPA2, open, etc). So, we cannot even say the problem is specific to the type of network. Again, it would also have nothing to do with blueTooth interference, since we are talking about 5gHz bands in this case. I, personally, have seen wireless drop on my own laptop, and I am not using Bluetooth devices when it happens. I have confirmed packet loss by running WiFi diagnostics on a 5gHz band; in the same case, I verified that the RSSI and transmit rate was on par with what it should be. This should rule out any concerns people have regarding signal strength or interference.

All in all, I think the biggest issue, and perhaps the one still truly unresolved, in the random dropping of the wireless. I am waiting for more information about 10.8.3 in hopes that they are really addressing THAT part of the problem.

Frankly speaking, it took some convincing to my user that the problem was with Apple and not in my ability to do my job. Amazingly, people think Apple is perfect.

Signed,

Frustrated support person

"Eventually I solved my problem with these steps and now it works as a charm. I can still find the iMac with the remote app, even after 12 hours of sleep:

My time capsule router is set on automatic MTU and encrypted with WPA2 and I use the 5Ghz network!

1. 1. Cleaned all the wifi passwords in keychain on my iMac
2. 2. Created a new network location in system preferences
3. 3. In this location I deleted the bluetooth pan and bluetooth dun connection.
4. 4. In this location I changed the preferred connection-order to wifi on #1 and ethernet on #2.
5. 5. Restarted my iMac.

Now I still have a connection when it sleeps and I can wake it to low profile using the remote app (homesharing) and everything works fine.

Hope more people will be helped by this."

The solution you describe above is the exact one I did on Sunday by trial and error and it also worked for me!! The only slight difference is my number 1 was to create a new 5ghz network - bridge connection - on time capsule first and point my apple TV and ipad to it (both run amazing now!).

The other network is still running on 2.4ghz and is fine for my iphones and tablet...

I only have one outstanding issue, I would be obliged if anyone can help??

.... although it tells me in top right of mac (airport triangle icon) that airport is connected to my BTHH3 (but not the BTwifi or btwifiw ith FON) - when I click on 'network' in the mac system preferences area it tells me wifi is off and there are obviously no networks to chose from! Stumbler and insidder also tell me my wifi on the mac is off! So all very bizarre!???

The only time the wifi is on within system preferences is when I have just rebooted the mac mini - however this only lasts for 5 seconds - during this time Stumbler and insidder can see my 5ghz apple network, 2.4ghz homehub, BTwifi & btwifiw ith FON.

My mac mini is currently connected to home hub via Ethernet due to all previous drop outs. So is time-capsule because drop out have been horrendous since moving from snow leopard.

Any ideas on how this is happening or how to fix?

L

I should have been a little more clear. Ping cannot resolve a hostname like that.

the command should be:

ping www.apple.com (leave the http:// off of the hostname).

You could also try the following:

1. trash the system config PLISTS and reboot (note you will loose your iMac's network settings, so if you are using static entry's IP address, DNS, etc be sure to write them down before attempting this).

Open a terminal and do the following commands:

mkdir ~/Desktop/old_sys_configs

sudo cp -pR /Library/Preferences/SystemConfiguration/* ~/Desktop/old_sys_configs

cd /Library/Preferences/SystemConfiguration/

rm -rf *.plist

The above commands will save a copy of your current network settings to a folder on the Desktop. Reboot your iMac. When your Mac comes back, try to connect to your Ethernet network or Wi-Fi network and see what happens.

If you wanted to restore your old network configuration (since the files are on the desktop) all you would need to do is the following in terminal:

sudo cp -R ~/Desktop/old_sys_configs/* /Library/Preferences/SystemConfiguration/

And then reboot.

Bro, you must be having the same problem with many of the guys are facing. It's a known bug and waiting for apple to come out with solution. I suggest you stick to wired connection first. At least you are lucky. I am using iPad to reply you as I have the same problem as you. This also shows my internet wifi is good.

I had the WiFi issue too with my late 2010 iMac... had to change the router settings to WPA2 instead of WEP security. According to Apple Care, the WEP security is too old school for the new software. HTH.