Wifi Constantly Dropping in Lion

I'm also getting WiFi drops on my new iMac running 10.7.1 - especially after waking from sleep. My situation appears to be the same os that of Shaunmull (above) in that the Mac is staying connected to the router, but the connection appears as if the ISP has failed, so no apps can access the net. The problem resolves itself after experimental proddings such as mentioned above.

However an interesting point is that I have a MacBook Pro also running Lion 10.7.1 which has never had this problem; it's only apparent on the new iMac.

Gregory,

Who's USB WiFi adapter are you using and which driver is installed?

I am wondering if this is a driver issue or an Apple WiFi hardware implementation issue.

I have a Late 2011 mini and have not seen the issue at all with either 10.7 or 10.7.1.

It seems that we have verified that people with and without the issue are using the same WiFi chip so a chip design flaw seems unlikely.

Doc

Just remembered - the MBP which doesn't have the problem was given a clean install of Lion (erase, repartition), whereas the iMac with the problem in all probability had Lion installed over Snow Leopard before I bought it.

Doc,

I'm using an EnGenius EUB9603H adapter, which has its own driver of course.

I don't believe we're looking at a hardware problem at all. Many computers (mine included) worked fine with SL. The 10.7 update is what broke WiFi.

Greg

actually lion works fine for except some crash issues which doesn't happen often etc. just saying and mine is a mid-late 2010 imac intel machine

I was "drop free" for about a week with 10.7.1, now the drops are back just like before. Wifi "radar" shows connected, but ping doesn't work. Crazy.

I have a Mid-2007 Macbook w/ 10.7.1 installed. Did a full clean install of snow leopard then upgraded to lion through the app store (not a clean install for lion) I have installed Lion twice and I am still having wifi drop outs. It is definiatly a software issue.

My WiFi Card -

en1:

Card Type: AirPort Extreme (0x168C, 0x87)

Firmware Version: Atheros 5416: 2.1.14.9

MAC Address: 00:1c:b3:b4:24:c7

Locale: FCC

Country Code: US

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, 149, 153, 157, 161, 165

Status: Connected

Current Network Information:

My Macbook information -

MacBook

13-inch Mid 2007

Processor 2 GHz Intel Core 2 Duo

Memory 2 GB 667 MHz DDR2 SDRAM

Graphics Intel GMA 950 64 MB

Software Mac OS X Lion 10.7.1 (11B26)

Just a me too... Brand new 27" iMac i7 with 10.7.1

One more thing... When trying to transfer stg via AirDrop to my 2009 MBP or viceversa, after a few megabytes the transfer freezes and i loose internet access on the imac at the same time... HAve to turn off and on wifi again....

On the macbook no wifi issues at all

HiHo,

having the same problem with a MacBook and an (older) iMac I did call Apple Support. I reconfigured the WLAN router and switched from 802.11 n+b+g to 802.11 b+g only... seems to work for the time being. I'll keep my fingers crossed that this will work until there is an update available :-)

Ciao

Michael

wow... a number of hours later... and it is still working.

Wifi issue here....

Let me say my temporary solutions:

• PRAM reset
• SystemConfig deleted
• duplicate keys in Keychain deleted
• Switched among wifi channels
• Ipv6 "only local link"
• and....A CLEAR INSTALATION OF LION!

In a day my connection go down 5-6 times (in a 4-5 hours).

Installed 10.7.1

NO SOLUTION FOR ME.... I really don't know.......

I have a new Mid 2011 iMac and the problem is endemic, even as I type this posting. *** are you doing MAC!!!???? Fix it!!! I need my Wi-Fi!

I may have fixed this by going into Network in System Preferences, under Wi-Fi, click Advanced, and remove all prefered networks and then reconnect to your desired Wi-Fi. I have not had it drop yet, I will keep you posted.

This was the first thing that worked for me. Wifi now comes up every time through Sleep, Restart, Shutdown.

I've had this problem as well, on my 27 iMac with lion preinstalled. Was on the phone yesterday with apple care (3 different calls) for about two hours, we did the whole gambit of trouble shooting solutions, PRAM reset, deleted System configs, changed DNS, cycle router and modem all with no effect. So, I think were going to have to wait for a software update. I've resorted to using the ethernet port hardline with no problems for the last 24 hours or so.

Also happening to my i3 27" iMac. Won't hold a connection for more than a few minutes. Cable is not an option. What a PAIN!