OS X Lion Wireless Issues

As iBrian and Pallas A suggested, I trashed the '/Library/Preferences/SystemConfiguration' folder. No luck -- my daughter still lost the internet connection every time her computer went to sleep. My husband's and my computers are still on Snow Leopard, so we haven't had this problem. I gave up and plugged the netwrok cable left from the days before we went wireless, so she doesn't have to deal with it.

Hi all

Got same problem with 2009 Macbook Pro: clean installed 10.7.3 from 10.7.2 (sans kruft) today and have wasted the entire day looking for a fix. My router is Lynksys WRT54GR.

But, may have found 'a' way that helps:

System Preferences - Network ... underneath where it would say Status: Connected I noticed that the IP address was not an IP address that my router at home gives out.

So, on Advanced-TCP/IP I changed to Using DHCP with manual address and set it to one of the addresses I could see in the router via ethernet cable (like 192.168.1.121 since it assigns addresses in the range 192.168.1.100 to 192.168.1.149).

Worked and now have wireless at home; tentatively. Yet to venture out and see what it's like around town/work, but I'll take that for now.

I really hope this helps.

I am also having the same issue. I have sleep turned off, but after a certain amount of time, my imac will drop the wireless connection. Also, if I reboot, or put the computer to sleep, once the computer is back up running again, the wireless is not connected to my router. When I am connected, it works fine. This 3.06GHz Core i3 worked flawlessly until I upgraded to Lion......

And in addition to the above post, I also have a Macbook Pro on my network, same O.S. version, 10.7.3, and it never has any problem whatsoever connecting the the network, and it never drops off, and it connects right away every time I wake the Macbook from Sleep. I never have any issues with my iphone or ipad either, it seems to be limited to the imac... I have also tried all the solutions in this thread, nothing has worked......

I bought my Macbook Pro mid 2011 with Snow leopard installed and everything worked great until I installed Lion OSX and I to had wifi connection problems. What worked for me so far, fingers crossed, repaired permissions, reset PRAM, cleared cache, and manually entered my IPv4 address, subnet mask, router IP, and DNS servers, turned off IPv6. When I say manually, I did not choose using DHCP with manual address just the Manual option. So far 2 weeks now with no disconnects. Everything running smooth, hope it continues. Internet connects fast on wake with no more problems.

2011 Macbook Pro, 2.3 Ghz,13 inch, i5, 4GB, Lion OSX 10.7.3

Good Luck

I am now also having this issue. I was not having any issues with this until I replaced my old linksys router with a new Apple Time Capsule. Now I need to select a wireless network each time my Macbook Air is woken from sleep. Very frustrating.

My new iMac (purchased in Nov 2011--latest model as of 2/18/2012) is now having the problem that it will not connect to my wireless router after returning from sleep.

All my other Macs (older iMac and older PowerMac G5) DO NOT have this problem.

I contacted Apple Technical Support and they walked me throught their process to determine if they could solve the problem. At the end, they said that they could not fix the problem and they are aware of the issue and are working on a fix. This was yesterday (2/17/2012).

For all the others who have the same problem as me; it is not your router. Changing the settings on your router will not fix the problem. Deleting your System Configuration preferences will not fix the problem.

The problem is with the wireless network software built into Lion.

The only way this is going to get fixed quickly is for everyone with a Mac under AppleCare to call Apple Support.

Hope this helps.

Hagrid...

Thank you, Hagid.

That is what I thought. I've gone through all of the motions to correct the issue. I have to reset the router at home, at work, and if I'm staying in a hotel. I have to restart the computer. At the moment I cannot access the wireless router in my office at all! My other computer with Snow Leopard has none of these issues. It is a sad statement about Apple that we are still without a fix.

After the most recent update, Apple appears to have fixed this problem on my iMac (mid 2011 model).

This is a disgrace. To continue to have these issues almost a year after the release? DOn't be like microsoft and give us new features while leaving old bugs. Understand the apple community. We like working software, not new features. I am currently using my linux laptop because my wireless hangs up and disconnects too much on my imac.

FIX IT ALREADY!

I've made a very interesting discovery this morning while troubleshooting this issue. I was testing ping response times of a 2011 MacBook Air that came with Lion pre-installed from my workstation. The ping response times were all over the place, anywhere from 20-200 ms! I have been trying all of the different suggestions that people have provided and checking the ping times. No change. I said to myself, I might as well run Software Update to make sure I have everything, and sure enough when I fired up Software Update on my MBA, the ping response times dropped down instantly to >1 ms. I was thinking to myself, what did I do differently? I couldn't think of anything except for SWUD, so I stopped it, and immediately my ping reponses went back up and where all over the place. I resumed SWUD and they dropped back down. Freaking bizzarre I know!!! I have also tested it with simply pinging an apple site (swcdn.apple.com, support.apple.com) from the client and that seems to help as well. I've heard of people suggesting pinging facebook.com or google, but that didn't work for me, only the apple sites did.

I will continue testing today and keep an eye on things, but I just wanted to share with you all!

Worked for me! Thanks 🙂

It's quite time consuming exercise to read all this long chain of conversation.

However here is what I did to fix this problem on my home network.

On my home router in wireless settings I made a change of 802.11 mode speed to limit it up to 145Mbps instead of 300Mbps.

That's pretty much it.

I'm running MacAir and iPad for a few weeks now with no problem to suddenly disconnect.

In the past I had to switch off wireless and switch it back again in order to recover wireless connection to last for some time.

I also made a change from Australia to US region but really don't think this is an issue.

The computer that I will update to Mountain Lion is connected directly with an ethernet cable. Based on the comments above, I don't see where I should have that issue...right?

I am having a somewhat different issue. I have a 2010 MacBook Pro with 10.6.8 updated on all Apple apps. I started not being able to access "normal" websites (http://....). However, I have no problem accessing secure sites (https://....). I also have the same problem regardless of browser (Safari, Chrome, Firefox). I also am not able to download any email to "Mail" app (tho thankfully am able to view it in my Spammarrest account--a "secure" site). I backed up my hard drive, repaired permissions, verified and repaired disk (got one message that originally said there were "corrupted" files or parts of the disk). Have since run Verify (in Disk Utility) and three times it shows "OK". Does anyone have ANY ideas? I think it must be software related, perhaps doing with permissions (have reparied permissions twice).

My wife has no such problems on her iMac, so likely not router related (of course, I have rebooted everything several times).

Thanks anyone!