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Apple Broadband Tuner 1.0 (#4): Kernel panics on subsequent startup, fix; Alternative connection optimization tools
Kernel panics on subsequent startup, fix A few users have reported serious startup problems after applying the Broadband Tuner patch -- likely not directly resultant from the changes made by the update, but by other latent problems
As previously noted, if you have a kernel panic during the first boot after applying Broadband Tuner 1.0, you can restart in Safe Mode to sidestep its effects. Restart while holding down the Shift key to startup in Safe Mode, then either re-run the Broadband Tuner installer and choose the proceed to the "Installation Type" section. You should see that the "Broadband Tools Uninstaller" option is selected.
Alternatively, you can delete your sysctl.conf file, which is modified by Broadband Tuner, via the following Terminal command:
- rm /private/etc/sysctl.conf
The default sysctl settings will be restored in a new file.
Alternative connection optimization tools As noted by a number of readers, there are several alternative tools for changing TCP packet and buffer settings, in many cases providing better optimization than offered by the one-setting Broadband Tuner.
These include:
Feedback? Late-breakers@macfixit.com.
Previous coverage:
- Apple Broadband Tuner 1.0 (#3): What type of connections the update will optimize best; More reader results
- Apple Broadband Tuner 1.0 (#2): Most report increased throughput; Reduced throughput speed for some; Uninstall instructions
- Apple releases Broadband Tuner 1.0
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