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I am a web developer and I recently found out about Network Link Conditioner, but I can't get it to work.

It appears to be working, but when I load anything in a browser, the speed is not changed, regardless of whether or not I use 100% packet loss, etc.

Can anyone tell from this log what might be causing this?

OS 10.7.5, Xcode 4.4.1.

I have tried uninstalling and rebooting in various sequences but no improvement.

Also did the steps here: https://stackoverflow.com/questions/12414676/network-link-conditioner-seems-to-have-no-effect-on-network-behavior-on-lion-mo

When I switch it on or off, I get this in the Console:

1/19/13 3:28:19.142 PM [0x0-0x38038].com.apple.systempreferences: System Preferences(683,0x10e0b1000) malloc: *** auto malloc[683]: error: GC operation on unregistered thread. Thread registered implicitly. Break on auto_zone_thread_registration_error() to debug.
1/19/13 3:28:19.533 PM NLCd: API Version mismatch
1/19/13 3:28:19.534 PM com.apple.nlcd: Jan 19 15:28:19 Jason.local NLCd[698] <Notice>: API Version mismatch
1/19/13 3:28:19.534 PM [0x0-0x38038].com.apple.systempreferences: _nlc_stop_simulation: (os/kern) failure
1/19/13 3:28:19.534 PM System Preferences: process command (simulate) failed
1/19/13 3:28:19.536 PM System Preferences: Stopping Network Link Conditioner
1/19/13 3:28:19.537 PM NLCBackgroundApp: Received callback that simulator was stopped!
1/19/13 3:28:31.408 PM [0x0-0x38038].com.apple.systempreferences: _nlc_start_simulation: (os/kern) failure
1/19/13 3:28:31.409 PM System Preferences: process command (simulate) failed
1/19/13 3:28:31.441 PM System Preferences: Starting Network Link Conditioner
1/19/13 3:28:37.105 PM _securityagent: audit warning: allsoft
1/19/13 3:28:37.105 PM _securityagent: audit warning: soft /var/audit
1/19/13 3:28:37.106 PM _securityagent: audit warning: closefile /var/audit/20130119222807.20130119222837
1/19/13 3:29:07.100 PM _securityagent: audit warning: allsoft
1/19/13 3:29:07.100 PM _securityagent: audit warning: soft /var/audit
1/19/13 3:29:07.100 PM _securityagent: audit warning: closefile /var/audit/20130119222837.20130119222907
1/19/13 3:29:37.104 PM _securityagent: audit warning: allsoft
1/19/13 3:29:37.104 PM _securityagent: audit warning: soft /var/audit
1/19/13 3:29:37.105 PM _securityagent: audit warning: closefile /var/audit/20130119222907.20130119222937
1/19/13 3:30:07.103 PM _securityagent: audit warning: allsoft
1/19/13 3:30:07.103 PM _securityagent: audit warning: soft /var/audit
1/19/13 3:30:07.103 PM _securityagent: audit warning: closefile /var/audit/20130119222937.20130119223007
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  • Why is this getting voted down? This is a legit issue I am having.
    – Jason
    Jan 21, 2013 at 18:50
  • I get similar errors: OSX 1.7.5 *** 4/12/13 4:19:08.249 PM [0x0-0x1e01e].com.apple.systempreferences: _nlc_start_simulation: (os/kern) failure *** 4/12/13 4:19:08.351 PM [0x0-0x1e01e].com.apple.systempreferences: System Preferences(308,0x1114c5000) malloc: *** auto malloc[308]: error: GC operation on unregistered thread. Thread registered implicitly. Break on auto_zone_thread_registration_error() to debug.
    – alanning
    Apr 12, 2013 at 20:21
  • 1
    for those looking for an alternative, I found that Speed Limit works for me: mschrag.github.io
    – alanning
    Apr 12, 2013 at 20:28

2 Answers 2

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Network Link Conditioner must be run from an administrator account to work properly.

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These warning messages are generated by auditd...

The above indicates that the soft (disk space) limit for all filesystems has been exceeded. Your system is running low on disk space.

audit warning: soft /var/audit

The above indicates that the soft limit for this directory has been exceeded.

audit warning: closefile /var/audit/20091208225521.20091210084714

The above indicates that a trail file has been closed, so can now be post-processed. After the audit log gets larger than a certain size (see /etc/security/audit_control) auditd will close the trail file and open a new one.

For more information see auditd(8), audit_warn(5), and audit_control(5). You may want also see the documentation on trustedbsd.org: http://www.trustedbsd.org/docs.html

Source:

http://web.archiveorange.com/archive/v/8tBh4AyzX5tdrZYC5PaH

See also:

Common Criteria Configuration and Administration Guide

Oracle: How to Change Audit Flags

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