Q: 27" imac wifi problems (intermittant)

I've had a similar problem where I get dropped from my wifi frequently, particularly when the iMac goes to sleep mode. I frequently have to reconnect to the network. However, I note that Apple just today released a wifi software update. Hopefully this means they're onto the issue and that this is a fix.

I am also having WIFI issues even after running the latest software updates that were intended to fix these issues.  General choppiness, slowness, sometimes cuts altogether, and often does not connect after sleep/wake. Reboots fix the problem only for a few minutes and then the problem resumes.  The most noticeable effect of this problem is when I am streaming music via Airplay to my Apple TV.  It cuts out many times each minute.  I own an iPhone, iPad, and Macbook Pro.  None of these other devices experience these issues. 

Please help, this is extremely frustrating considering this was the most expensive of all of my Apple products and should really work better than all of the others.

I have the same problem on my Mid 2011 27' iMac, and I noticed it's already 2 years but the problem still here!!!!!

The newest update of imac wifi not seems work very well and I even have to use my old PC to connect internet and post here!!

hi, you can try to change the channel number on your wifi box, maybe if you have a neighbor in the same chanel or close of your own. Its good to have at least 2 chanels numbers between each wifi numbers .

I use Snow Leopard rather than Lion, so the software "fix" was not applicable to me, however there was a firmware update released at the same time for my 2011 iMac and since that update my WiFi is constantly dropping out - it struggles to hold a connection for 5 minutes.

Of course, if I reboot onto the Windows partition on my desk, I have no problems at all.  It seems ironic that to enjoy such a basic functionality (connecting to the internet), I have to run my Apple as a Windows machine !!

This had been a problem which had constantly plagued me since I bought this new machine (my 2008 Macbook Pro has no such issues), until I changed my WiFi channel to one which nobody in my immediate vincinity is using (I'd still get the odd disconnect, but not with any alarming frequency).  Since the firmware update however, everything has reverted and is, in fact, worse than it ever was beforehand.

I encounter same on my Mid 2011 21.5" imac (OS X Lion , 10.7.3) that I bought it at the beginning of Jan,2012. However this WIFI problem does not exist in my WIndows partition on the same imac. I guess there is program bug in the mac driver program of the imac wifi card !

I have had wifi problems for several months but as it turned out it wasn't a software (OS X lion) but a router problem.

It wasn't a connection loss with the router but the iMac lost connection to the internet.

Maybe my sollution is applicable for more OS X lion and iMac(intel) users.

Many routers can send a mixed WiFi signal like B,G and/or N.

The mid 2011 iMac can recieve both G and N WiFi signals but when a router switches all the time between G and N it gets "confused".

The sollution for my iMac:

My router was programmed to send a mixed wifi signal (G and N ) on a mixed frequency (20 to 40 Mhz)

I changed that to a fixed N wifi signal and fixed frequency.

Further more I checked which WiFi channels my neigbours where using and changed mine into a channel that was at least 2 channels different than the one from my clossest neighbours.

I hope this will help some of you.

There is only one thing that I realy have to say.

The iCentre's here in Holland suck.

I have absolutly no confidence in their skils.

They tried to convince me that setting my IP adress on manual was responsible for this problem and charged me Euro 79,- to change that into an automatic IP adress because software issues aren't covered by the standard warrenty on a almost new iMac.

Last weekend Europes biggest Apple store in Amsterdam opened its doors and hopefully they will do a better job in the future.

Also I think that the people at Apple can do a much better job in providing sollutions even when it is not directly related to one of their products.

... did something similar with my Apple TimeCapsule: disabled automatic and manually set 2.4 and 5.0GHz networks to use a fixed, separate, channel.

seems fine so far: the iMac dosn't drop anymore 5.0Ghz network. so... I'm not that sure it's a router problem ;-p

What frequency are you using (20 or 40) ?

I use 40.

Using it for more than a week now and the WiFi signal hasn't dropped since I made the changes.

Perhaps it is not the sollution for everyone but for a few people who are having the same problem I have had.

But it everyone can try it and maybe it works.

I hope in a seriuos Apple update!!

My wi-fi is good all the others devices working good but my imac 27" intel every 10 minutes need to disconnect /connect to wi-fi.

Bad situation........

Venni

Yep, I´m in the same situation with my IMAC 27''. This is the part of Apple that the media doesn´t show.....

Hi all,

The latest update has resolved the problem of waking my Imac after sleep mode via a bluetooth device (mouse or keyboard) however I am now getting the problem of a dropped connection around one or two minutes afterwards.  I am beginning to wonder if Apple actually know what the problem is?  This is really not like them! I am really getting annoyed now with this whole issue, I paid good money for this machine and bought into Apple providing the best, I among others are beginning to think otherwise!  Come on Apple! Prove us wrong!

My wake from sleep issue is still there, it;'s just not as bad as it was.

Cheers,

Cameron

Still having issues with my wifi. It worked great for about a week. Then I saw it go offline twice in a span of a few minutes. Then it was fine.

Today I got home and when I logged in it was offline and refused to go online. :E

That lasted for about 10 or 15 minutes. Good thing I have a 25' ethernet cord around here.

Anyway, sooooooo frustrating..........

Now it's back online with wifi but I'm leaving the darned cord in there! It looks very attractive on the carpet.

Judie