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I recently bought a MacBook Air and transferred my system information and user data via Migration Assistant. I used to get error messages on my old computer like this:

The system extension “/System/Library/Extensions/hpPlugInInit.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update

I hoped that this would go away with the new computer. (No, that's not why I bought it but it was supposed to be a good side-effect!)

But now I'm still getting this error message when installers are running. I don't have any HP printers, but I did at one time. How can I get this error message to stop? According to the HP support website there is an uninstaller I can run, but I don't have any such uninstaller.

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  • sounds like HP crapware was installed - with OS X there really is no need for their software as the printers can use Apple drivers. you should manually remove the kernel extension (carefully)
    – Woodstock
    Commented Aug 7, 2013 at 6:57
  • @JohnWoods: What's the best way to manually remove the kernel extension in a safe manner? Of course backup is the first option, but otherwise what's the procedure, and how to check to make sure it's not going to screw up my system?
    – Jason
    Commented Aug 7, 2013 at 14:43

1 Answer 1

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Manually deleting hpPlugInInit.kext under /System/Library/Extensions/ gave me a solution.

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