Q: Updated to 10.7.3. Wifi drops constantly.

If you ping the router ip address, do the pings stay up ?

eg: ping 192.168.1.1

where 192.168.1.1 is the router IP address.

Same problem here.  Since updating to 10.7.3, wifi on my mid 2010 iMac (11,3) is not reconnecting automatically after waking up from sleep.  I have to manually select the network.  I've had no wifi problems before this update. I have an Apple airport extreme router.

Same problem here.  Since updating to 10.7.3, wifi on my iMac12,1

is not reconnecting automatically after waking up from sleep.  I have to manually select the network. I have an Apple airport extreme router.

My iMac 21" 2011 has the same problem.

Same problem here with an iMac 21" .. after the update from 10.7.2 it now will not auto-reconnect to wifi, and I have to manually connect.  I use a linkys router.

I had wifi connection problems under Lion 10.7.2 with my new iMac and tried everything to fix it - there is a huge discussion about this under another thread. Having purchased a new router and fiddled with various settings I maintained a reasonable connection (only 2 or 3 drops a day). Having upgraded to 10.7.3 things are back to being a complete disaster with wifi not reconnecting from sleep and drops every few minutes. Laughably this was one of the issues that was supposed to be addressed in this new release. I have a macbook air, an iphone, two windows machines and an xbox all of which have no problems at all.

I purchased my iMac partly because I could not stand the smug, superior look on my mac-owning friends faces when they discussed how amazing and how infinitely better their machines were compared to any machine running any version of Microsoft Windows.

Obviously I should never have listened to them.

What signal strength is your iMac seeing the wireless network at ?  Hold down the Option button and click on the WiFi Menu Extra to see the RSSI value. Is it between -35 and - 70. What security are you using ? Are you on the 2.4 Ghz or 5 Ghz network ?

Sometimes there could be folks around you in the 2.4 Ghz network using wide channels and eating up all the bandwidth.

Run this command in Terminal and paste the output here:

/System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -s

Try to switch channels on your wireless network and see if it gets better.

RSSI : -70

WPA2 Personal

2.4GHz

                            SSID BSSID             RSSI CHANNEL HT CC SECURITY (auth/unicast/group)

                     CC_Wireless d8:5d:4c:b8:c7:c3 -82  2       Y  -- WPA(PSK/AES/AES)

                          B-7-3A 00:25:9c:1c:91:13 -86  6       Y  -- WEP

                            PAUL 00:1b:90:74:4a:d0 -78  11      N  -- WPA(PSK/TKIP/TKIP)

                        MKR_Home 00:25:4b:06:d5:41 -72  11      Y  MT WPA(PSK/TKIP/TKIP) WPA2(PSK/AES,TKIP/TKIP)

                           dlink 00:26:5a:bb:5b:71 -61  3       N  -- WPA(PSK/TKIP,AES/TKIP) WPA2(PSK/TKIP,AES/TKIP)

                       jss@unifi 00:26:75:3a:b7:5e -84  10      Y  SG WPA2(PSK/AES/AES)

                      adrianchan 5c:d9:98:dd:39:14 -84  11      Y  GB WPA(PSK/AES,TKIP/TKIP) WPA2(PSK/AES,TKIP/TKIP)

                Ritchie Wireless 00:24:36:a8:d5:2f -88  2       Y  US WPA2(PSK/AES/AES)

                        Don Dada 58:6d:8f:3d:6f:c4 -91  1       Y  -- WPA2(PSK/AES/AES)

                          0644EE 00:1f:fb:06:44:ee -86  11      N  TW WEP

I have tried channels 1 thru 13, always get the wifi drop.

After updating my imac (27-inch, Mid 2011) using the software update, I've been having problems with my wifi connection.

The wifi does connect to my access point, but the connection quality is quite bad.

With ping, on average, I get 60% loss to my access point.

The signal strength seems fine: RSSI -47

I've tried also installing the combo update. The wifi issue remains the same.

The wifi was working properly prior to the update.

I've tried connecting to my access point with open authentication and with WPA2/AES with the same results.

Please help!!

A solution besides a system restore would be preferable.

Wifi signal strength details:

...$ /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -s

...

                          crunch 00:18:84:89:3f:ec -47  10      Y  BE WPA2(PSK/AES/AES)

...

Ping details:

...$ ping 192.168.1.2

PING 192.168.1.2 (192.168.1.2): 56 data bytes

Request timeout for icmp_seq 0

Request timeout for icmp_seq 1

64 bytes from 192.168.1.2: icmp_seq=0 ttl=64 time=2905.727 ms

64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=2281.194 ms

64 bytes from 192.168.1.2: icmp_seq=2 ttl=64 time=1281.819 ms

Request timeout for icmp_seq 5

Request timeout for icmp_seq 6

64 bytes from 192.168.1.2: icmp_seq=4 ttl=64 time=3280.608 ms

Request timeout for icmp_seq 8

64 bytes from 192.168.1.2: icmp_seq=8 ttl=64 time=1544.818 ms

64 bytes from 192.168.1.2: icmp_seq=10 ttl=64 time=995.718 ms

Request timeout for icmp_seq 11

Request timeout for icmp_seq 12

Request timeout for icmp_seq 13

^C

--- 192.168.1.2 ping statistics ---

15 packets transmitted, 6 packets received, 60.0% packet loss

round-trip min/avg/max/stddev = 995.718/2048.314/3280.608/842.310 ms

Imac specs:

Processor  3,1 GHz Intel Core i5

Memory  12 GB 1333 MHz DDR3

Graphics  AMD Radeon HD 6970M 1024 MB

Serial Number  C02FGBQWDHJQ

Software  Mac OS X Lion 10.7.3 (11D50)

I also have a wifi problem with my macbook pro running Lion 10.7.3 (11D50), every few minutes the wifi disconnects and reconnects by itself. There should be an update for this wifi bug soon!

Suggest you delete "-" the Wifi service in Sytem Preferences/Network and then recreate "+" it. Then reconnect to Wifi network

My WIfi runs very fast and is relaible under 10.7.3 and I am two floors and 50 feet away from my router - 30 down and 20 up.

that did not help, I am 5 feet away from my router, all other wireless devices are working properly.