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sander81 Author

Level 1

5 points

iMac 12,2 (mid 2011) airport (wireless) problem

I bought this week an iMac Mid 2011.

I have done every update from " software update", but i have an issue with the wireless connection.

Sometime the wi-fi connection freezes and internet doesn't work (ping with router fails). To solve I have to disconnect airport and re-connect.

The router wireless works (i have 4 pc + 2 mac + iphone, and i have this problem only with this iMac). In windows (bootcamp) wireless works fine.

Yesterday, when i opened Network Utility, opening the airport interface (en1) I had a kernel panic (this happened 2-3 times). So I reinstalled MacOsX.

Today I have the same issue with the wi-fi, but when i open network utility i have not kernel panic.

Someone has this problem?!

Solutions? Next week I'll call apple support to see if this is a known problem

iMac, Mac OS X (10.6.7)

Posted on May 7, 2011 5:35 AM

Top-ranking reply

rkaufmann87

Level 10

144,294 points

Posted on May 7, 2011 6:58 AM

You can call AppleCare today, they're open in the US on Saturdays however because you don't state where you're located I can't vouch for your country.

You can try some fundamentals such as repairing Disk Permissions in Disk Utility, resetting the SMC and resetting the PRAM.

It also could be a simple issue with the DNS settings your ISP is using. Macs can be sensitive to these, if you are not familiar with DNS setting please read MacWorlds DNS Troubleshooting article and then make the follow change:

1. System preferences

2. Network

3. Click Advanced

4. Click DNS tab

5. Click + sign

6. Add 208.67.222.222

7. Click + sign

8. Add 208.67.220.220

9. Click OK.

10. Exit System Preferences

11. Try out your iMac and report what happened.

Roger

View in context

417 replies

Jul 19, 2011 3:00 AM in response to Kricki

I just thought you should know... Lion FIXES the issue. When it's installed, a pop up (much like the rosetta install) pops up and asks if you want to install something similar to "cvmdsnresponder" (that's not exact, don't try google it) and when I said yes.. my whole world changed!!!

🙂

Not a single dropout in 5 days so far!

LOtang

Level 1

0 points

Jul 19, 2011 5:50 AM in response to Kricki

Update: I am on day 5 without a single dropout, or any hanging in my iMac connection. Forcing my airport ex to broadcast in only G has worked well so far. Still running wpa2. Hope lion fixes too, feels wrong to have all the hardware to broadcast in N and not be able to use it.

Kricki

Level 1

0 points

Jul 19, 2011 2:30 PM in response to LOtang

As Apple has just confirmed to launch Lion tomorrow we will all be smarter soon...

Farthen

Level 1

0 points

Jul 20, 2011 11:25 AM in response to sander81

I can reproduce the exact same problem with Lion. It does not fix the issues, at least not for me.

_R_

Level 1

0 points

Jul 20, 2011 9:59 PM in response to sander81

Just bought a 2011 27" iMac eariler this week...

Here is my setup and my symptops

Router: Netgear WNDR3700 (Dual Band) broadcasting seperate G and N networks

2010 13" MBP can connect and use both N and G networks no problem. (I run N since I have a network drive)

27" iMac can connect to N according to the wifi on the menu bar, but it doesn't do anything, everything times out, connects to G network no problem

I've tried changing channels, transfer speeds, security settings on the router for the N network and the iMac still won't do anything except connect to the network... also tried manual settings, and every checkbox on and off in Networks (System Prefs), still nothin...

Running 10.6.8 or 10.7 (installed it today hoping it would fix the problem) makes no difference...

G works great for both iMac and MBP (but slow transfer speeds to network drive)

N only works for the MBP

hopefully a solution will come out... it's kinda annoying...

wifiguru

Level 2

240 points

Jul 20, 2011 10:22 PM in response to _R_

Are you using WPA2-Personal as the security method ? Check and try that if you aren't.

Jul 20, 2011 10:45 PM in response to Farthen

For the problem I had with the 802.11n with my Cisco AP1142N, Lion seems to have fixed my problems. I am able to sustain >100Mb/s with 802.11n / WPA2-AES on both 5Ghz and 2.4Ghz. The errors that my AP was reportings seems to have subsided. (See my previous posts).

I will continue to do some testing, but at least for the problems that I was having with wireless have been resolved. Not happy I had to spend $30 for it, but figured I would have upgraded at some point anyways.

If anything changes, I will let everyone here know.

Farthen

Level 1

0 points

Jul 21, 2011 3:22 AM in response to wifiguru

Yes, I do use WPA2-Personal. But think i have the 300Mb/s issue others have described.

_R_

Level 1

0 points

Jul 21, 2011 6:40 AM in response to wifiguru

WPA2-PSK [AES] is my current setting... (it's the lowest security option I have on the router)

I've tried with it off as well...

also tried 300 speed, 130 speed, and 54 speed...

all same results...connects according to the wifi icon, but won' let me do anything, nothing loads or connects

ezdanny

Level 1

0 points

Jul 21, 2011 9:34 AM in response to sander81

I´m really tired about this issue. Hoping that Lion fixes it but another 24 euros to the trash. Monday I´ll be at the store throwing the imac in and taking my money back.

I´m very dissapointed with the mac service.

Just have lost a 18 year client.

By the way, with Lion the problem is worst, every 5 minutes I have to turn off/on airport.