Q: iMac drops Wifi connection after 10.7.4 update

Hello there,

I am experiencing intermittent wifi connection problems after installing the 10.7.4 update on my 2011 iMac 27".

The symption is that the iMac drop its Wifi connection after a period of time and when that happens the iMac cannot detect any wifi networks in my area (disabling & re-enabling Wifi on the iMac doesn't help). I have to resort to restarting the iMac to revive the wifi interface. Note that my other devices (including my iPhone and my MacBook Air) can connect to my Airport Extreme without any problems.

Is there any "quick-fix" solutions out there that can fix this problem? I want to avoid a complete re-install as much as possible.

iMac, Mac OS X (10.7.4), 27"

Posted on May 13, 2012 2:44 AM

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Q: iMac drops Wifi connection after 10.7.4 update

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by emanuel_in_sf,

emanuel_in_sf Jul 20, 2012 11:41 PM in response to theneb.bstl
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Jul 20, 2012 11:41 PM in response to theneb.bstl

I finally got fed up with wifi constantly dropping. I don't have time to back up everything and re-install Snow Leopard, and we don't know if Apple will ever fix this in Lion or Mountain Lion, so I ordered Asus's USB-N10 wireless adapter from Best Buy:

http://www.asus.com/Networks/Wireless_Adapters/USBN10/

It was only $20, and installing it was a breeze. I finally have an uninterrupted internet connection again! The only downside is that I've got one less USB port.
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by zapje,

zapje Jul 21, 2012 4:51 AM in response to emanuel_in_sf
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Jul 21, 2012 4:51 AM in response to emanuel_in_sf

Finaly i've solved Apple's problem the same way emanuel did. I bought myself a seperate WIFI adapter. WIFI is stable since that moment

It's a bloddy shame that Apple don't solve this problem for their customers. We all bought a expecive iMac and have to buy a 9,99 adapter to let the wifi work properly.

Shame on you Apple!
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by voxapple,

voxapple Jul 21, 2012 6:33 AM in response to theneb.bstl
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Jul 21, 2012 6:33 AM in response to theneb.bstl

This has been driving me crazy...............However, I followed the advice in the thread and have now enabled the 5GHz connection and it has been rock solid for over a day.
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by philkdc,

philkdc Jul 24, 2012 10:47 AM in response to emanuel_in_sf
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Jul 24, 2012 10:47 AM in response to emanuel_in_sf

Why does the new adaptor work if the problem is in the Lion software. Is Lion incompatible with the original adaptor but compatible with your Asus?
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by philkdc,

philkdc Jul 24, 2012 10:48 AM in response to zapje
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Jul 24, 2012 10:48 AM in response to zapje

Why does the new adaptor work if the problem is in the Lion software. Is Lion incompatible with the original adaptor but compatible with your $9.99 adaptor?
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by Winbo,

Winbo Jul 25, 2012 2:43 PM in response to theneb.bstl
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Jul 25, 2012 2:43 PM in response to theneb.bstl

Anyone tested with Mountain Lion. Any changes ??
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by wapsijim,

wapsijim Jul 25, 2012 3:26 PM in response to Winbo
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Jul 25, 2012 3:26 PM in response to Winbo

I installed ML this afternoon, so far so good as far as dropping WIFI connection, but it's only been a couple of hours.....Keeping my fingers crossed.
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by philkdc,

philkdc Jul 25, 2012 3:35 PM in response to wapsijim
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Jul 25, 2012 3:35 PM in response to wapsijim

Keep us updated if you can.
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by barrettfromva,

barrettfromva Jul 25, 2012 7:56 PM in response to philkdc
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Jul 25, 2012 7:56 PM in response to philkdc

Wifi has been going strong for several hours now after installing ML!!! I think they fixed it!
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by rinux64,

rinux64 Jul 25, 2012 9:38 PM in response to barrettfromva
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Jul 25, 2012 9:38 PM in response to barrettfromva

hello all,
I have installed ML yesterday, I previously reinstalled lion from scratch and now I have this status:

ping -c 900 8.8.8.8
...
--- 8.8.8.8 ping statistics ---
900 packets transmitted, 885 packets received, 1.7% packet loss
round-trip min/avg/max/stddev = 55.540/65.150/2378.824/109.464 ms

bye
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by fredges,

fredges Jul 25, 2012 9:43 PM in response to theneb.bstl
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Jul 25, 2012 9:43 PM in response to theneb.bstl

Great! All I have to do is buy and install a new OS! ...Hooray?? Grrr...
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by msa,

msa Jul 25, 2012 10:13 PM in response to fredges
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Jul 25, 2012 10:13 PM in response to fredges

I've installed ML and still facing the same problem!
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by emanuel_in_sf,

emanuel_in_sf Jul 26, 2012 11:52 PM in response to barrettfromva
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Jul 26, 2012 11:52 PM in response to barrettfromva

Maybe I'll give Mountain Lion a try. I've had a stable wifi connection so far with my USB wireless adapter, but would much rather prefer to use my imac's internal one instead.
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by hbklau,

hbklau Jul 29, 2012 6:28 AM in response to theneb.bstl
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Jul 29, 2012 6:28 AM in response to theneb.bstl

Mountain Lion still has the same issue. Please take note! I did a clean install and the problem still persists. Lion also has the same problem. I think most the IMAC are facing the similar issue.
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by rockso,

rockso Jul 29, 2012 8:15 AM in response to theneb.bstl
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Jul 29, 2012 8:15 AM in response to theneb.bstl

I'm sorry I haven't read this entire post but I've also had problems with my imac dropping it's wifi signal. Yesterday I called apple and they had me delete the "preferred networks" from "system preferences/network/wifi/advanced"

I then connected to my wifi network and re-entered my password. It hasn't dropped the signal since. Pretty simple fix but the problem is extremely irritating. I don't have time for this stuff.

When I called the support agents were fully aware of the problem.
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