Just installed these kexts works perfectly with the 552. Thanks for your help. To anyone trying to do this, make sure you install both the io8011family.kext and the Atherosfix.kext one after the other and make sure to repair your disc's permissions in disk utility before you restart. I am running the Lifehacker setup
I have the same problem. I changed the plist flag to ach=i386 and now I'm stuck in an endless reboot. I don't know how to get back into 64 bit if I can't boot back up can someone please help.