Error OSSystemExtensionErrorDomain Code=4 "(null)"

When my macOS app try to deactivate CameraExtension, my app's didFailWithError is called with this error.

Error Domain=OSSystemExtensionErrorDomain Code=4 "(null)"

I cannot search for error code=4 with that domain.

MyApp calls OSSystemExtensionManager.shared.submitRequest with OSSystemExtensionRequest.deactivationRequest

I did implement these tasks.

  • BundleID, MyApp: com.myapp,
  • BundleID, CameraExtension: com.myapp.camera
  • Added entitlement and App Groups for app and extension
  • MyApp has SystemExtension capability on Xcode and provision
  • MyApp is installed on /Applications/MyAppGroup/MyApp.app
  • MyApp is executed by Finder

macOS is Sonoma 14.2.1 (23C71) on M1 MacBook

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Himadeus
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I think this error is OSSystemExtensionErrorExtensionNotFound, from <SystemExtensions/SystemExtensions.h>.

I see this error also when I try to deactivate my camera extension (after approving its removal with the OS' dialog), but I'm running on a laptop with a built-in, non-removable camera. Maybe the error doesn't happen if there are no cameras in the system, so my extension can be unloaded.

I don't know and don't particularly care, because in our shipping apps we never make a deactivationRequest. It isn't clear to me what that API is for - as far as the user is concerned, the driver is installed because they installed its host app and approved it.

Posted by
ssmith_c
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I made sure my camera extension is installed and activated

With command "systemextensionsctl list" and my camera extension is listed with "[activated enabled]"

Host app calls API OSSystemExtensionManager.shared.submitRequest with OSSystemExtensionRequest.propertiesRequest. OSSystemExtensionRequestDelegate.foundProperties is called with my extension's bundle ID.

Posted by
Himadeus
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In some condition, like kill app pocess during OSSystemExtensionManager.shared.submitRequest(), CameraExtension go into unstable condition. Normal uninstall is not possible.

I need to do

  • Reboot MacBook with recovery mode
  • run "csrutil disatble"
  • Reboot
  • run "systemextensionsctl uninstall [teamID] [BundleID]"
  • Reboot with recovery mode
  • run "csrutil enable"
  • Reboot
Posted by
Himadeus
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If you have a reproducible process for getting your Mac into this state, please do file a bug about it. This sort of hoop jumping shouldn’t be necessary.

I’d appreciate you postingf your bug number, just for the record.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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eskimo
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