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VerizonLover

macrumors member
Original poster
Apr 16, 2012
60
16
I've download Turbo Boost Switcher (OSS version) from here, but whenever I run it the enable/disable does not work.

When I try to manually load the kernel extension (DisableTurboBoost.64bits.kext) I get the infamous error:

Code:
/Volumes/RAM Disk/Turbo Boost Switcher.app/Contents/Resources/DisableTurboBoost.64bits.kext failed to load - (libkern/kext) authentication failure (file ownership/permissions); check the system/kernel logs for errors or try kextutil(8).

I've tried manually repairing permissions using:

Code:
sudo chmod -R 755 DisableTurboBoost.64bits.kext/
sudo chown -R root:wheel kDisableTurboBoost.64bits.kext

but the same error message appears, and the user and group are still of the mian user (user:staff).

Running 10.14.6.

Any help?
 
Last edited:
Does "/Volumes/RAM disk" have permissions enabled? Use Finder's Get Info on "RAM disk" and make sure the "Ignore ownership on this volume" checkbox is not checked.

Code:
sudo chown -R root:wheel DisableTurboBoost.64bits.kext
sudo find DisableTurboBoost.64bits.kext -type d -exec /bin/chmod 0755 {} \;
sudo find DisableTurboBoost.64bits.kext -type f -exec /bin/chmod 0644 {} \;
sudo kextload -v 6 DisableTurboBoost.64bits.kext
 
Have you tried kextutil then? It will likely tell you what’s wrong:
Bash:
kextutil -tn "/Volumes/RAM Disk/Turbo Boost Switcher.app/Contents/Resources/DisableTurboBoost.64bits.kext"

Where is the app located? Is it on an external drive perhaps? I suppose it ought to be installed in /Applications.
 
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