10.7.3 no wifi connection after wakeup

Well - my "fix" has failed :-(

Reinstalling the combo update has NOT fixed the issue.

Just upgraded and many apps crashing. Cannot get about this mac to come up. Safari, Mail, Iphoto, System Preferences all crashing. Very frustrating. I have never had this problem with an upgrade. I did install Microsoft Office 2011 just before this upgrade so I am suspicious of that.

No me neither I installed the combo, no joy. What are Apple playing at? Surely it can't be that difficult. Despite getting a new imac from Apple because of this problem I am tempted to take it back, I really am.

Can't anyone from Apple comment?

I'm having the same exact problem. The iMac with i5, after sleep, has the wifi grayed out. I have to manually select the network. Never had the problem before upgraded to 10.7.3. The macbook pro is working fine though.

Now my iMac i3 is having the same problem - my 17" i7 MBP is the only one of the three I updated that will connect to WiFi after awakening from sleep - the two iMacs require manual effort.

Apple has messed this one up and I fear, from past experience, it may take them awhile to sort this out.

Add me to this list. Had problems in 10.7.0, 10.7.1, fixed in 10.7.2 and now broke in 10.7.3. Connecting to a TC 3rd Gen running firmware 7.6.1. Tried all the standard stuff, delete network/add network, reset TC. Seems to be dependent on how long the machine is asleep. If I force a sleep and wake it within a few minutes no problem. Let if set for a hours, no join after wake.

Works fine though on MPB Model 6,2, Old MB model 4,1.

Model affected iMac 27"

Model Name: iMac

Model Identifier: iMac12,2

Processor Name: Intel Core i5

Processor Speed: 2.7 GHz

Funny thing is the update states it "Resolve a Wi-Fi connection issue when waking from sleep".

http://support.apple.com/kb/HT5048

They fixed it alright.. They broke it.

This morning I "upgraded" my OS from Lion 10.7.3 to SL on the iMac i3 - WiFi connects when waking from sleep as it used to with Lion 10.7.2.

My MBP continues to connect to WiFi under Lion 10.7.3 - fingers remain crossed.

Our i5 iMac fails to connect when waking from sleep.

The MP will remain on 10.7.2 for awhile.

I believe there is a time component as well - that might guide Apple to the problem.

Same problem for me. No wifi after wakeup. Mid 2011 iMac. Lame.

No problems until upgrading from 10.7.2 to 10.7.3 yesterday. Now wi fi doesn't connect after wake up. Have to execute wi fi off then wi fi on to fix. Applecare is pretending that I'm the only one with this bug. Let's all of us BUG them until they acknowledge/fix this. Their response is so far very un-applelike!

I have same issue with wifi connection - when waking from sleep mode with the new and improved Lion 10.7.3 software. This is on my Mid year 2011 iMac 27 (iMac12,2 3.1 GHz, 12 GB Ram). Wifi Network is Time Capsule with 7.6.1 version software. Never had this problem until updating Lion to 10.7.3. I also tried the "Combo" update solution, no improvement, waste of time.

We have no problems with our iMac 24 running Snow Leopard or any of our iPhones or iPads, all are connecting normally with the Time Capsule after sleep modes.

As others have posted, wifi available after startup from power down mode, but not from Sleep mode. I can make the iMac with 10.7.3 connect to the TC by turning wifi off then back on.

Very annoying, this reduces the overall "experience", as it delays being able to quickly check email or other network/Internet functions.

Same issue, problems with wifi after wake. Details:

10.7.3 (11D50)

iMac 27", Late 2009

Intel Core i5

AirPort Express v7.6.1

I am going to ring AppleCare as soon as I get 5 mins as work is very busy at moment. I don't understand why Apple cannot fix such a fundamental issue. It's beyond me. I will report back when I have spoken to them.

I have the same issue....wifi connection grayed out after wakeup. I have to Open Network Preferences and select

my default network. Very annoying.

(Feb 3, 2012 - updates to Lion & Airport from Apple)

When waking up by pressing the power button instead of using the mouse, it reconnects without having to select the network manually. Works fine on my mid ´11 iMac 21.5". Not a solution, but maybe a workaround.

Works for me also. Same computer and vintage as Stuermer (the post just above - re tap power switch to wake-up instead of mouse).