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10.7.3 Breaks Network Connectivity iMac?

Hey guys,


My work computer updated to 10.7.3 in my 2010 iMac.


After restart, all network connectivity is down. It will not pick up an IP address via WiFi or Ethernet.


I cannot even connect to my Time Capsule to do a restore.


Any ideas?

Posted on Feb 1, 2012 5:17 PM

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Question marked as Best reply

Posted on Feb 1, 2012 11:24 PM

Hey all,


For anyone who is interested, turns out my Firewall was off.


I am not sure why is was off, further more I am not sure why my Ethernet / WiFi would not pick up an IP address with the Firewall turned off.


Anyway, turning the Firewall back on seemed to fix things.


System Settings > Security & Privacy > Firewall


Might help anyone who has a similar issue!

41 replies
Question marked as Best reply

Feb 1, 2012 11:24 PM in response to mattmate

Hey all,


For anyone who is interested, turns out my Firewall was off.


I am not sure why is was off, further more I am not sure why my Ethernet / WiFi would not pick up an IP address with the Firewall turned off.


Anyway, turning the Firewall back on seemed to fix things.


System Settings > Security & Privacy > Firewall


Might help anyone who has a similar issue!

Feb 2, 2012 10:45 AM in response to Jaysun

This does not sound like a wireless issue, rather something higher up the stack.


Please turn on DHCP logging by opening a terminal and doing:


sudo ipconfig setverbose 1


Please reproduce the issue where the firewall is on (after reboot) and you cannot get an IP address.


Then in a terminal please run the following commands (one at a time):


sudo ipfw -a l


sudo sysctl -a | grep ip.fw.


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getblockall


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --listapps


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getallowsigned


Now fix the problem with your workaround of turning the firewall off and then on and repeat the above commands. Please post the output of the commands to this thread along with the log /var/log/com.appleIPConfiguration.bootp

Feb 2, 2012 11:26 AM in response to Jaysun

Also, you can try removing the firewall plist and rebooting to see if that corrects the issue?


Open a terminal and do:



sudo mv /Library/Preferences/com.apple.alf.plist com.apple.alf.plist.orig


This will preserve your original alf plist for the firewall.


Now reboot your Mac and the plist will get created from scratch. See if that corrects the issue.

Feb 2, 2012 1:07 PM in response to mattmate

I deleted the firewall plist and I'm still having the same issue.


Firewall on, no internet connectivity:


sudo ipfw -a l


65535 0 0 allow ip from any to any


sudo sysctl -a | grep ip.fw.


net.inet.ip.fw.enable: 1

net.inet.ip.fw.autoinc_step: 100

net.inet.ip.fw.one_pass: 0

net.inet.ip.fw.debug: 0

net.inet.ip.fw.verbose: 0

net.inet.ip.fw.verbose_limit: 0

net.inet.ip.fw.dyn_buckets: 256

net.inet.ip.fw.curr_dyn_buckets: 256

net.inet.ip.fw.dyn_count: 0

net.inet.ip.fw.dyn_max: 4096

net.inet.ip.fw.static_count: 1

net.inet.ip.fw.dyn_ack_lifetime: 300

net.inet.ip.fw.dyn_syn_lifetime: 20

net.inet.ip.fw.dyn_fin_lifetime: 1

net.inet.ip.fw.dyn_rst_lifetime: 1

net.inet.ip.fw.dyn_udp_lifetime: 10

net.inet.ip.fw.dyn_short_lifetime: 5

net.inet.ip.fw.dyn_keepalive: 1


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, ALF kGlobalStateKey does not return a CFNumber

Firewall is enabled. (State = 1)


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getblockall


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, ALF kGlobalStateKey does not return a CFNumber

Block all DISABLED!


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --listapps


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, kApplicationKey does not return a CFArray


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getallowsigned


Automatically allow signed software ENABLED


After the problem has been fixed by turning the Firewall off and on:


sudo ipfw -a l


65535 0 0 allow ip from any to any


sudo sysctl -a | grep ip.fw.


net.inet.ip.fw.enable: 1

net.inet.ip.fw.autoinc_step: 100

net.inet.ip.fw.one_pass: 0

net.inet.ip.fw.debug: 0

net.inet.ip.fw.verbose: 2

net.inet.ip.fw.verbose_limit: 0

net.inet.ip.fw.dyn_buckets: 256

net.inet.ip.fw.curr_dyn_buckets: 256

net.inet.ip.fw.dyn_count: 0

net.inet.ip.fw.dyn_max: 4096

net.inet.ip.fw.static_count: 1

net.inet.ip.fw.dyn_ack_lifetime: 300

net.inet.ip.fw.dyn_syn_lifetime: 20

net.inet.ip.fw.dyn_fin_lifetime: 1

net.inet.ip.fw.dyn_rst_lifetime: 1

net.inet.ip.fw.dyn_udp_lifetime: 10

net.inet.ip.fw.dyn_short_lifetime: 5

net.inet.ip.fw.dyn_keepalive: 1


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, ALF kGlobalStateKey does not return a CFNumber

Firewall is enabled. (State = 1)


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getblockall


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, ALF kGlobalStateKey does not return a CFNumber

Block all DISABLED!


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --listapps


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, kApplicationKey does not return a CFArray


sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getallowsigned


Automatically allow signed software ENABLED

Feb 2, 2012 1:13 PM in response to Jaysun

Ick. This does not look good:


ALF: Error, IsExpectedCFType(variableInQuestion) variable == NULL!

ALF: Error, ALF kGlobalStateKey does not return a CFNumber



See, I can run the same commands and I am not seeing that evil error:


wow:SystemConfiguration hello$ sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate

Password:

Firewall is enabled. (State = 1)

wow:SystemConfiguration hello$ sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getblockall

Block all DISABLED!

wow:SystemConfiguration hello$ sudo /usr/libexec/ApplicationFirewall/socketfilterfw --listapps

wow:SystemConfiguration hello$


Let me poke around a bit and see what I can find out from my Apple contact.

Feb 3, 2012 11:10 AM in response to mattmate

I'm having the exact same problem. Manually turning the Firewall on fixes it, but it's a manual and temporary solution, at best. As someone who uses her MacBook in several locations throughout the day, this is a big fail., I


FYI, I went to the Apple Store earlier this week to try to get a fix for these ongoing Wi-Fi problems. The Genius told me that I'm the only person who's having this trouble. When I said there are hundreds of pages of complaints in the Apple Support Forums, he snarkily told me that there are hundreds of people who post messages about Big Foot on the internet, too. It was all I could do not to shove my "big foot" in his big mouth. And no, after deleting my system configuration folder with much fanfare, he couldn't fix the problem, either.


It would be swell if Apple would take this problem seriously!

Feb 3, 2012 1:47 PM in response to DrVenture

Thanks for your help with this!


total 0

drwxr-xr-x 17 root wheel 578 Aug 19 18:57 .

drwxr-xr-x 73 root wheel 2482 Aug 19 18:56 ..

drwxr-xr-x 3 root wheel 102 Jun 23 2011 Apple80211Monitor.bundle

drwxr-xr-x 3 root wheel 102 Aug 9 22:18 ApplicationFirewall.bundle

drwxr-xr-x 3 root wheel 102 Jun 19 2011 Bluetooth.bundle

drwxr-xr-x 3 root wheel 102 Jun 24 2011 EAPOLController.bundle

drwxr-xr-x 3 root wheel 102 Jun 23 2011 IPConfiguration.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 IPMonitor.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 InterfaceNamer.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 KernelEventMonitor.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 LinkConfiguration.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 Logger.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 NetworkIdentification.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 PPPController.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 PreferencesMonitor.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 PrinterNotifications.bundle

drwxr-xr-x 3 root wheel 102 Jun 18 2011 wwanConfig.bundle

Feb 3, 2012 2:47 PM in response to mattmate

I'm having the same issue on two Macs. Restarting firewall appears to fix it, but has to be done each time my Mac is restarted.


Out of interest, did everyone else suffering this problem have 'Litte Snitch' installed? This firewall app seems to be removed by this update, and I think the problem may be caused by the method Little Snitch used replace the standard firewall.

10.7.3 Breaks Network Connectivity iMac?

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