If there is a kext with the same name in Librar... |Apple Developer Forums

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Latest reply on Nov 6, 2019 12:51 AM by eskimo

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K.Hayashi Oct 27, 2019 7:13 PM

If there is a KEXT with the same name in System/Library/Extensions and Library/Extensions in Catalina, please tell me which is preferred.

My KEXT can no longer be installed in System/Library/Extensions, so I am trying to install it in Library/Extensions.

I want to know which one works if I already have it installed in System / Library / Extensions.

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Apple Staff (12,425 points)
eskimo Oct 28, 2019 1:11 AM (in response to K.Hayashi)

Can you explain why you’re using a KEXT that’s named the same as a system KEXT?
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- Re: If there is a kext with the same name in Library and System, which one takes precedence?
  
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  K.Hayashi Oct 29, 2019 12:20 AM (in response to eskimo)
  
  Thanks for getting back to me.
  
  My KEXT was installed in System/Library/Extensions.
  In 10.15, when installing to System/Library/Extensions, an error occurs and installation is not possible.
  Therefore, it was changed to Library/Extensions.
  As a result, a situation occurs in which KEXT with the same name exists in System/Library/Extensions and Library/Extensions.
  
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  - Re: If there is a kext with the same name in Library and System, which one takes precedence?
    
    Apple Staff (12,425 points)
    eskimo Oct 29, 2019 2:55 AM (in response to K.Hayashi)
    
    But only KEXTs built-in to macOS are installed in /System/Library/Extensions/. What built-in KEXT are you trying to override?
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    - Re: If there is a kext with the same name in Library and System, which one takes precedence?
      
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      K.Hayashi Oct 29, 2019 6:26 PM (in response to eskimo)
      
      Up to 10.14, I could install my own KEXT which is not built-in to macOS.
      I can't install my own KEXT with Catalina.
      Therefore, I changed the installation location to Library/Extensions.
      
      Regards,
      eskimo
      
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      - Re: If there is a kext with the same name in Library and System, which one takes precedence?
        
        Apple Staff (12,425 points)
        eskimo Oct 30, 2019 2:23 AM (in response to K.Hayashi)
        
        /Library/Extensions/ has been the correct place for third-party KEXTs for many releases. I’m surprised that /System/Library/Extensions/ worked for you up until 10.14. I would have expected SIP to deny your installation.
        Regardless, other than the enforcement of the new directory requirements, what’s the actual problem here?
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        Re: If there is a kext with the same name in Library and System, which one takes precedence?
        
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        K.Hayashi Nov 5, 2019 12:51 AM (in response to eskimo)
        
        I am concerned that the old KEXT in /System/Library/Extensions/ will work when the /Library/Extensions/ KEXT is new.
        
        Regards,
        eskimo
        
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        Re: If there is a kext with the same name in Library and System, which one takes precedence?
        
        Apple Staff (12,425 points)
        eskimo Nov 5, 2019 1:40 AM (in response to K.Hayashi)
        
        When you say “old KEXT”, do you mean “old KEXT placed there by Apple”, or “old version of my KEXT that’s somehow managed to find its way into /System/Library/Extensions/”?
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        Re: If there is a kext with the same name in Library and System, which one takes precedence?
        
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        K.Hayashi Nov 5, 2019 5:01 PM (in response to eskimo)
        
        “old KEXT” is “old version of my KEXT that’s somehow managed to find its way into /System/Library/Extensions/”.
        I want to know whether /System/Library/Extensions/ or /Library/Extensions/ KEXT works on the system.
        
        Regards,
        eskimo
        
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        Re: If there is a kext with the same name in Library and System, which one takes precedence?
        
        Apple Staff (12,425 points)
        eskimo Nov 6, 2019 12:51 AM (in response to K.Hayashi)
        
        The OS install process will generally remove any third-party KEXTs from /System/Library/Extensions/. Unless this is one of the KEXTs bundled with the OS itself. Is that what’s happening here?
        Share and Enjoy
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        Apple Developer Relations, Developer Technical Support, Core OS/Hardware
        let myEmail = "eskimo" + "1" + "@apple.com"
        
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Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

Re: If there is a kext with the same name in Library and System, which one takes precedence?

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