Apple kext rejected due to invalid signature

Question

Created Apr ’20

Replies 4

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Participants 3

Hi there,

I had problems with high CPU load of kernel_task for weeks now and decided to clean up my kexts. I deleted the Silabs Usb Driver kext and invalidated the cache via

sudo kextcache -invalidate /

This gave the following strange output

Untrusted kexts are not allowed
Kext rejected due to invalid signature: <OSKext 0x7ffc9675a160 [0x7fff89e2c8c0]> { URL = "file:///Library/Apple/System/Library/Extensions/AppleUSBEthernetHost.kext/", ID = "com.apple.macos.driver.AppleUSBEthernetHost" }

How can this be? Is this kext from Apple corrupt or something?

I'm on macOS 10.15.4.

Best regards

Boost

Answer 1

joconnor OP

Apr ’20

codesign -vvvvvv /Library/Apple/System/Library/Extensions/AppleMobileDevice.kext

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Answer 2

cunum OP

Apr ’20

/Library/Apple/System/Library/Extensions/AppleUSBEthernetHost.kext: a sealed resource is missing or invalid

file added: /Library/Apple/System/Library/Extensions/AppleUSBEthernetHost.kext/Contents/version.plist

How can I fix this? I can't even remove the file because the extensions are read only in Catalina.

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Answer 3

jvesterheden OP

May ’20

Accepted Answer

This doesn't really answer your question, but here's some information about potential causes for kernel_task causing high load: https://mjtsai.com/blog/2020/04/23/throttling-due-to-thunderbolt-left-proximity-sensor/

To delete the KEXT, you can disable SIP temporarily.

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Answer 4

cunum OP

May ’20

SIP disabling worked but I think I have to reinstall Catalina, you never know how much corrupt stuff is still running in the background.

Regarding the kernel_task, I'll check if I also have dust in my fans, also regarding the Usb-C power connector issue, I also observed the kernel_taks popping up more often when it is connected. The new Macbook Pro's are a thermal disaster of epic proportions, everyone who really needs the CPU power they paid for has these throttling issues, already thinking about buying a ******* cooling pad for this stupid machine.

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