Wifi: No Hardware Installed after 10.7.3 update?

I have exactly the same situation. Occasionally I get wifi - once yesterday but most of the time it's no bars, no hardware and I can't turn it on.

MacBook Pro running 10.7.3. It's a disaster for me. I had to hurry home with a 16 hour drive to use my wired iMac.

I used to have the same situation on 10.7.0.

Perhaps are you connecting your mac to any HDMI port thru the video port? Try disconnectring it and rebooting.

Hope it helps.

Before that happened I used to see a progress bar below the Apple logo while starting the iMac.

Hmmm. I've got the 17" MBP 3,1 running 10.7.3 and I don't seem to be having any issues using wifi on my system. I did have the sleep problem sometime back around 10.7.1 or 10.7.2 but I learned from someone that by turning off the feature to allow bluetooth devices to wake my computer, my sleep was restored, I just checked and my MBP even sleeps without that little "hack".

If your system is telling you that you don't have the hardware, it is possible that your internal wifi NIC had gone bad, or may have a bad connection. I remember that the bluetooth connector can easily come out if you aren't carefule, but I don't remember much about the wifi hardware in my system...

I have a iMac 20" 2.4GHz 2007. Was working perfectly fine before the Lion 10.7.3 update. Now I have the same issue. I tried restarting the mac with everything unplugged (mouse, keyboard, etc) still nothing.

Someone please find a solution as Apple obviously never admit to any faults and aren't helping.

Thanks

well, I'm going to try downloading the Client Combo and reinstalling it to see if it helps. Wish me luck

http://support.apple.com/kb/DL1484

Just reinstalled 10.7.3 using the Client Combo, but the issue still exists.

Did you ever swap out the card and have a new third party card installed on this machine ? Paste some of the kernel.log info. right after a restart and that can help identify what is happening. You can get to the kernel.log from the Console app.

The wifi card is the original stock card, I have never replaced it. I have replaced my HDD and RAM though, but I doubt that would be an issue.

From kernel.log:

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43224]: The vtable '__ZTV17AirPort_Brcm43224' is malformed. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43224]: The super class vtable '__ZTV16IO80211Interface' for vtable '__ZTV26AirPort_Brcm43224Interface' is out of date. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43224]: The vtable '__ZTV17AirPort_Brcm43224' is malformed. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43224]: The super class vtable '__ZTV16IO80211Interface' for vtable '__ZTV26AirPort_Brcm43224Interface' is out of date. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: Can't load kext com.apple.driver.AirPortBrcm43224 - link failed.

Feb 2 17:05:12 DKO kernel[0]: Failed to load executable for kext com.apple.driver.AirPortBrcm43224.

Feb 2 17:05:12 DKO kernel[0]: Kext com.apple.driver.AirPortBrcm43224 failed to load (0xdc008016).

Feb 2 17:05:12 DKO kernel[0]: Failed to load kext com.apple.driver.AirPortBrcm43224 (error 0xdc008016).

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43xx]: The vtable '__ZTV16AirPort_Brcm43xx' is malformed. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43xx]: The super class vtable '__ZTV16IO80211Interface' for vtable '__ZTV25AirPort_Brcm43xxInterface' is out of date. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43xx]: The vtable '__ZTV16AirPort_Brcm43xx' is malformed. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: kxld[com.apple.driver.AirPortBrcm43xx]: The super class vtable '__ZTV16IO80211Interface' for vtable '__ZTV25AirPort_Brcm43xxInterface' is out of date. Make sure your kext has been built against the correct headers.

Feb 2 17:05:12 DKO kernel[0]: Can't load kext com.apple.driver.AirPortBrcm43xx - link failed.

Feb 2 17:05:12 DKO kernel[0]: Failed to load executable for kext com.apple.driver.AirPortBrcm43xx.

Feb 2 17:05:12 DKO kernel[0]: Kext com.apple.driver.AirPortBrcm43xx failed to load (0xdc008016).

Feb 2 17:05:12 DKO kernel[0]: Failed to load kext com.apple.driver.AirPortBrcm43xx (error 0xdc008016).

Something wrong with AirPort I see... the driver perhaps?

Okay I've got the wifi finally working by downgrading the AirPort driver to that of Snow Leopard.

Just follow this post: https://discussions.apple.com/thread/3194446?answerId=15780717022#15780717022

Download the KextUtility+ the Snow Leopard .kext, linked in that post.

Drag & Drop the .kext file onto the Kext Utility, then restart your mac.

Hope it all goes well!

roflcoxib,

I installed that SL hack on 10.7.2 and when I upgraded to 10.7.3, it broke my WiFi. I had to do a clean install and then upgrade to 10.7.3 to get my wifi working again.

Anyone else did that SL hack on earlier 10.7.x versions ? I think that breaks your WiFi.

It would make sense that each upgrade you would run into a problem after installing the SL hack. I guess the only solution is to keep reinstalling the SL hack with each OS upgrade, but that's all we've got to get the wifi working.