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kOSKextReturnNotLoadable on Mojave 10.14.6 #2373

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@Clifford-Yen

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@Clifford-Yen

Hi everyone,

I recently upgraded my MacBook Pro 13" 2014-mid from High Sierra to Mojave. I used Karabiner only for eliminating the caps lock delay, and I found Karabiner 12.10 and 11.6 both not work on Mojave 10.14.6. (I have updated to Security Update 2020-004)

There are lots of messages shown in Karabiner Log like:
[info] [kextd] KextManagerLoadKextWithURL: kOSKextReturnNotLoadable

This message shows every 3 seconds. I also found relevant logs in macOS console as follows:
Error making temporary directory: 1
Memory allocation failure.
Unable to stage kext (/Library/Application Support/org.pqrs/Karabiner-VirtualHIDDevice/Extensions/org.pqrs.driver.Karabiner.VirtualHIDDevice.v061000.kext) to secure location.
org.pqrs.driver.Karabiner.VirtualHIDDevice.v061000 was unable to stage properly; failing.

What I have tried:

  • Checked /var/db/SystemPolicyConfiguration/KextPolicy with sqlite3 command that Karabiner is allowed.
  • Boot into Recovery mode to grant permission to Karabiner with command spctl kext-consent add G43BCU2T37.
  • Restart macOS and reinstall Karabiner for countless times.
  • ls -laO /Library/StagedExtensions/ and checked the flag of /Library/StagedExtensions is "restricted"
  • Tried to reset the KextPolicy database (i.e. disable SIP, delete KextPolicy file, enable SIP, give permission to each kext extension again). I found that Karabiner did not ask for permission at all (other applications did ask). There is no "allow" button in Security&Privacy page for Karabiner, too.
  • Reinstall Security Update 2020-004 (Mojave)
  • sudo kextload and sudo kextutil org.pqrs.driver.Karabiner.VirtualHIDDevice.v061000.kext but both failed (sudo kextutil gave the exact messages shown in macOS console)

All measures failed. The only way I could make it work is to keep SIP off, which I really don't want to.

Does anyone have any idea? It's really frustrating. Any help is appreciated.

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