Tried a few more things without any luck:
- Reset SMC, PRAM and NVRAM
- Deleted /Library/Preferences/com.apple.alf.plist and rebooted
- Changed my ipv6 settings to link local
I've found out that Lion updates the firmware of the Airport card and the Airport utility so i think it has to do with that. I have a Broadcom BCM43 Airport Extreme (0x14E4, 0x88D) card. I don't have AVAST software or a firewall running but even if i did, that won't cause this kind of issues.
Apple really needs to fix this, i can't work without wifi.
Wifi on Lion is DEAD. Won't turn on.
Had always had a weird issue with Airport/Wifi on this laptop, 2.93 duo. If I would turn off Airport, then turn it back on the machine would freeze. Often when starting up it would freeze (verbose logging startup seemed to point to an Airport issue). Then other times it would start up no problem and Airport would be on.
Today installed Lion. Airport was working fine, was doing emails, browsing. Updated Little Snitch and did a re-start. Since then I cannot get Wifi to turn on. Have disabled LS, thinking that might be the prob. I choose "Turn on Wifi" and nothing happens. In system prefs it won't turn on there either. Click the button and nothing happens.
Have deleted the Wifi out of the interface box and re-added it, thinking that might fix it. Nope.
Under 10.6.8 that interface was called Airport, now under 10.7 it's called Wifi...weird. Is that something Apple changed?
Someone please help. Airport/Wifi is dead on my MBP with Lion.
Just tried a few more things:
- Deleted all airport related files in /Library/Preferences/
- Deleted all airport related files in my user library
- Did a permissions scan and fix with disk utility
- Verified my disk with disk utility
Nothing has worked for me yet. I really think Apple messed up with the firmware versions. I'm sure that if i'm able to flash the firmware back to the SL firmware it works fine.
Yep. Can confirm that Bert. This is the firmware version on Snow Leopard, right? The firmware version on Lion should be 220.127.116.11.6. It seems that more people are having difficulties with Airport under Lion. Connections that are dropping, slow speeds etc... I think that alot of these problems have to do with this firmware fail.
Hi, the same problem here. I upgraded yesterday to Lion an Wi-fi is death. Only during several minutes i could turn on "Wi-fi" and have signal. I've tried the following but nothing happens:
- Restore permissions.
- Reset SMC, PRAM and NVRAM.
- I've created a new location with only the Airport card under System preferences - Network.
- I've made the airport card inactive and active again.
AirPort Extreme (0x14E4, 0x8D)
firmware: Broadcom BCM43xx 1.0 (18.104.22.168.6)
Macbook Unibody bought in summer 2009, LION upgraded from SL 10.6.8
I supose is a firmware problem... We'll have to wait!!
Mine is still dead, have tried everything in this thread. Here's my report on Network, Wi-Fi:
CoreWLAN: 2.0 (200.46)
CoreWLANKit: 1.0 (100.43)
Menu Extra: 7.0 (700.42)
configd plug-in: 7.0 (700.57)
System Profiler: 7.0 (700.3)
IO80211 Family: 4.0 (400.40)
WiFi Diagnostics: 1.0 (100.26)
AirPort Utility: 5.5.3 (553.20)
Card Type: AirPort Extreme (0x14E4, 0x8D)
Firmware Version: Broadcom BCM43xx 1.0 (22.214.171.124.6)
MAC Address: xx:xx:xx:xx:xx:xx
Country Code: X0
Supported PHY Modes: 802.11 a/b/g/n
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165
Wake On Wireless: Supported