wifi: no hardware found after 10.7.4 update

Here is what worked for me.

I deleted all System cache's (using OnyX but I'm sure there are other ways of doing it) and then rebooted. After that wifi was back and working.

To all those having the problem. In the future make sure you have a bootable clone of your Mac on an external USB hdd in addition to or in place of Time machine backup. It is the easiest way to recover your entire Mac when problems arise.

http://www.cultofmac.com/48861/how-and-why-to-clone-your-mac-hard-drive-macrx/

http://www.bombich.com/index.html

http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html

Very similar or same problem here. Solved it by turning Stelth Mode off.

I had the same issue here:

- Macbook air (13 inch, late 2010).

- FileVault 2 enabled (the OS X Lion version; the machine did not come with Lion originally, but FileVault was only enable after Lion was installed).

The machine was fine with 10.7.3.

After updating to 10.7.4 wifi was not working (the infamous "no wifi hardware found" message).

Wifi is fine when the guest account is started (this is the Safari only guest account).

Wifi is also fine when the recovery disk is booted (from a USB stick).

After disabling FileVault & a reboot wifi is working OK again.

Just to be sure I installed the 10.7.4 combo update (not sure if that was needed).

After reinstall of 10.7.4 wifi is still working fine.

Enabled FileVault again.

After reboot wifi is still working OK.

Sees to be a couple different WiFi issues floating around.

You could try resetting PRAM and NVRAM by rebooting and holding alt+cmd+p+r until you hear the booting sound a second time. That helped me.

PRAM reset also solved the problem for me. Whew!

Thanks for thje PRAM idea. I updated from 10.7.3 on 3 computers in the past couple of days. The first has the issue and I did a reinstall. My second was fine and my third had the same issue of no hardware found. Doing the PRAM reset fixed it!

PRAM reset sorted me out too

http://support.apple.com/kb/HT1379

I have had this same problem since installing the 10.7.4 update on my Late-2008 MacBook Pro. I have tried all of the solutions here: zapping the PRAM, restoring to 10.7.3 from backup, and reinstalling 10.7.4. Nothing has worked so far. File vault was not activated on my system, so that wasn't the issue.

Man, I've been going crazy on this problem for like two weeks since initially updating to 10.7.3.

I've tried everything shy of wiping my drive and performing a fresh install (I'm in the middle of the a project).

But, I've performed multiple archive and installs, applied combo updates and created new user accounts, not to mention a million restarts, PRAM / SMC resets and System Config file dumps.

Nothing works for long! I even found a thread that suggested replacing the kexts (which I did too) It always goes away after a while.

Apple couldn't figure it out either and my local Apple Store replaced first the wifi card and then the entire logic board several days later. Still no dice!

In over 15 years of owning Macs, this is the worst experience I've ever had with an Apple product.

---

10.7.4

Macbook Pro Quad Core i7 2.2 (Early 2011)

Apple Installed SSD

Wiped the drive and performed a fresh install of 10.7.3 with a brand new user account — no data restored from my back up. No dice. Updated to 10.7.4, latest EFI firmware and assorted updates via Ethernet. Still no dice.

To anyone still having this issue:

I just finished my fourth trip to the Apple Store re: no recognition of my airport card after two clean installs. It turns out that Lion does not talk well with older airport cards. The problem was not that I had a failing airport card or that my system or home folders were corrupt in any way. Lion simply does not talk well with older airport cards, and Apple does not believe this is a significant issue to address (none of the techs had heard any word that there was a fix in the pipeline). My original airport card came with my early 2008 Macbook Pro. For $70 (Apple Store didn't charge me labor because of the multiple appointments and hastle I'd gone through re: this issue) I upgraded from a version 1 aiport card to the most recent version 4. Now my wifi is back and working as good as new. No need for any workarounds or reinstalls.

I hope this helps some of you.

Pretty sure that´s the reason, after installing 10.7.4 my Macbook Aluminum 2009 can´t find any network, the Airport hardware seems active but it just can´t see any wifi SSID, i´ve done all what others have suggestes (turn off bluetooth, delete saved SSID, add manually the SSID, reset PRAM, etc...)