Wifi won't turn on since upgrade to Lion

How do you install 10.7.1? If I install the 10.7 version I downloaded earlier and have no wifi there's no way I can update to 10.7.1.

Bert can you not temporarily have a wired connection? I think that is the only way you will be able to do it.

Not at the moment. Can't I delete the old 10.7 installer program and redownload it from the store, won't that be 10.7.1?

just download the patch first before upgrading.

http://support.apple.com/kb/DL1437

Easy like that, thanks!

the update 10.7.1 seems to have fixed my original problem (can't turn on wi-fi).

NTT

Not working for me either. SMC reset, Lion 10.7.1. Unable to turn on WIFI.

I have this on two different iMac models one is new this year and one from 2008.

😟

OK, went to Network Preferences, highlighted WIFI and deleted (minus button).

Then added it back (plus button) and it allowed me to turn WIFI on.

Restarted and it's still there so hopefully that's a fix.

Have the same problem on my laptop. After waking up this time WIFI wasn't connected. You can see it with the bars in the selection but won't connect. Turned it off then tried to turn it on, but it wouldn't go on. Restarted finder and it finally went on after a while. Looks like something is timing out. Was hopeing the patch fixed the issue, looks like it didn't

Just made update to 10.7.1. It's seem to work with my Late 2008 MBP.

WIFI stay on and online whenever it return from sleep or power off.

Crossing fingers!

🙂

I've got this problem as well, and not fixed by 10.7.1. Seems to happen when I put Macbook 2008 on ethernet for a while and turn wi-fi off. When I then switch back to wi-fi it won't turn on. Is this an issue with the Broadcom firmware? I have - Broadcom BCM43xx 1.0 (5.10.131.36.11) showing in sys info.

I had this same problem even after 10.7.1, and I did everything to no avail... reset SMC, deleted com.apple.aif.plist, reset PRAM, nothing worked. But believe it or not, after running OnyX for Lion and clearing all caches and logs, and then restarted the computer, Wi-Fi came right back on. Clearing your caches with OnyX is worth a try. Just back up your data first, like they recommend to. Hope this helps.

So the 10.7.1 fix did the trick for me up until yesterday when my wifi died again. I'm back to the "empty pie slice" for wifi and no way to turn it on. A reboot seems to do the trick but it doesn't last, at some point wifi dies again, I think it's happening when I close the screen and then re-open it to work on again a bit later. Has anyone else seen this issue resurface after it was working with 10.7.1?

Thanks!

My 2010 MBA still looses WIFI most times it has gone to sleep even after updating to 10.7.1. With 10.7 I was able to get WIFI to work most times by switching it off and then on again. With 10.7.1 the only way to get WIFI to work is to reboot.

none of the fixes in this thread provide a permanent fix.

smc reset, pram reset, 10.7.1 upgrade, clearing plists, clearing caches, etc etc etc

these provide only temporary work-arounds

airport still drops, wont turn back on

can only recover temporarily by rebooting

airport continues to work for a little while before it drops for unknown reasons or macbook pro goes into sleep mode

all other devices in the house work OK with airport express network