10.7.3 no wifi connection after wakeup

MIght be to early to say it fixes it for me. But the first test was successful.

Yup, same problem as all of you. Airport not connecting automatically to my time capsule after upgrading to 10.7.3. I had a similar problem a while back. Apple said to delete 3 plist files in /Library/Preferences/System Configuration: com.apple.airport.preference.plist , Network Interfaces.plist , and preferences.plist. After moving them to Trash, empty the Trash. Restart. Then, open system preferences menu, then network. Click WiFI, then open the little sub menu to set service order, drag WiFi to the top, OK, Apply.

Worked several months ago when I had this problem. But no effect now. Maybe it'll help someone else though.

I run an iMac Core I7. Interestingly, no problem with my Core 2 Duo MBP.

Go figure.

Also, Using the power button seems to help, But I think I've found another thing that may be working also. Wake it from Mouse/Keyboard but don't log in yet. Let it sit there for a few 15-20 secounds, then login.

Just did this on the iMac i5. Maybe some can try it also.

Same issue here - no WiFi after the iMac wakes from sleep after upgrading to 10.7.3

I did find that using the power button instead of tapping on the keyboard to wake my iMac works.

MacBook doesn't have this issue.

I'm assuming someone has filed a bug report with Apple already? If not I can do so.

I have exactly the same problem since the 10.7.3 update, except I have another quite annoyeing problem, too: Even when wifi is connected Safari (5.1.3) has to think for minutes to find a website - if it finds anything at all.

It simply denies to work. And it has nothing to do with wifi-setup. I tested with Firefox and Chrome. Both worked very well all conditions equal.

I must point out I am quite bored with Apple while now for several months having to reboot and read these never ending discussions insted of being produktive and creative.

Sooner or later I will be forced to choose a leap back to Snow Leopard, or even back to Windows 7. Not so sexy, but quite reliable compared to the old tired lion.

I know I should offer some kind kind of help here, but the only secure and safe advice I can think of for now - and one Apple might learn from - is:Crave back Your time and leave the platform!

From http://9to5mac.com/ "Apple removes standard Mac OS X 10.7.3 download due to bugs, offers combined download instead". Downloaded and installed MacOSXUpdCombo10-1.7.3.dmg fixed the bug.

OS X Lion Update 10.7.3 (Client Combo) is available at http://support.apple.com/downloads/ .

Thanks Apple!

I'm unable to download right now, but did this Client Combo fix the WIFI issue?

Installing the Lion 10.7.3 Combo version did not fix the lack of an active wifi from sleep on my mid 2011 iMac 27, your mileage may vary. Was a waste of time.

Yes and no! The WIFI issue was resolved for a couple of hours but now about four hours after the download/installation the bug is back. Almost like the fix self-destructed! The power switch work-around still works fine and as a side note WIFI connects OK after restart.

STrange I have had no issues on my 2008 iMac running Lion but my 2007 Mac Book (The Black one) since upgrading to Lion wakes from sleep and never logs back into my AP Extreme (5GHz) untill you click the Wifi icon at the top right of the screen then it logs in.

Since 10.7.3 the Macbook reconnects to 5GHz Wifi every time within a second or two tops seconds (not as fast and Snow Leopard did though)

2008 24" iMac (2.4GHz Core 2 Duo)

4GB RAM

2007 13" Macbook(black) 2.2GHz Core 2 Duo

4GB Ram

"Yes and no! The WIFI issue was resolved for a couple of hours but now about four hours after the download/installation the bug is back. Almost like the fix self-destructed!"

That was the exact same experience I had.

I have the exact the same problem as the original poster, however I am just using a "2Wire.Gateway" router from AT&T. Called apple support twice but nothing they tried resolved the issue.

Problem occured since updating from 10.7.2 -> 10.7.3.

I told them I would try installing the 10.7.3 combo update, and then call them back tomorrow, basically so they can send the problem on to their engineers...

iMac 27" 2010, i5, 16gb ram.

This is my first iMac, I still use a Windows7 laptop. If apple wants to keep pushing this image of being less buggy and working much better than PC's I think they may need to try a little harder. I'm not impressed with the number of issues OSX Lion has. Given the sandboxed nature of the OS as well as the limited variations of hardware they have to program for (compared to windows), my expectations were a little higher than this. While not nearly is pretty as OSX, Windows7 was incredibly stable and reliable.

I've been using the power button workaround today - combo did NOT fix the issue on my iMacs. I moved one of them back to SL - solid as a rock!!!

Lion is feeling more and more tarnished to me.

Re-installing 10.7.3 with the combo update did not resolve the issue for me either.

I am having the same problem on my week old iMac. I had no problems whatsoever on OSX 10.7.2 but after the upgrade to 10.7.3 I too am not able to auto connect to WiFi after waking up from 'Sleep' mode.

I have tried the combo install after the 10.7.3 update but that did not fix the problem.

I have found that if i bring the iMac out of Sleep mode using the power button as was mentioned earlier in this thread, Everything works normally but when i use the mouse or keyboard the problem re-occurs.

I have tried all of the fixes mentioned on other threads but nothing has worked so far!

I hope the problem is resolved soon!