The system extension "/Library/Frameworks/PrivateTunnel.framework/Versions/Current/Extensions/tap.ke xt" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

My MacBookPro freezes and i have to force shut it down and restart.
It then gives me these errors...
The system extension “/Library/Frameworks/PrivateTunnel.framework/Versions/Current/Extensions/tun.ke xt” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
The system extension “/Library/Frameworks/PrivateTunnel.framework/Versions/Current/Extensions/tap.ke xt” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
What does this mean? How can I fix it so it doesn't freeze again.
(All software up to date)

hello,
I have the same problem. does anyone have any ideas on what's going on and or how to fix it.
Thanks!!
Luis

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The system extension "/system/library/Extensions/appleusbethernethost.kext was installed improperly and cannot be used. please try reinstalling it or contact the product vendor for an update.

What does this message mean ? It has popped up a couple of times and I want to fix whatever it is. Thanks for your help.

Seems pretty clear to me. Here's what you can try:
Open Terminal in your Utilities folder. Paste the following at the prompt:
sudo chown -R root:wheel /System/Library/Extensions/AppleUSBEthernetHost.kext
Press RETURN. Enter admin password when prompted. It will not be echoed so type carefully. Press RETURN again.
Restart the computer.

What is this error message about, "The system extension "/Library/Frameworks/PrivateTunnel.framework/Versions/Current/Extensions/tap.ke xt" was installed improperly and cannot be used"?

It appears as a window with the following text, "System extension cannot be used. The system extension “/Library/Frameworks/PrivateTunnel.framework/Versions/Current/Extensions/tap.ke xt” was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update."
I close it by clicking "Ok", and it doesn't seem to affect the system performance in any way, but it's annoying knowing that it's there. The problem is quite old, and has persisted through several OSX updates.

hello,
I have the same problem. does anyone have any ideas on what's going on and or how to fix it.
Thanks!!
Luis

Getting message - The system extension "/System/Library/Extensions/On/USBMassStorageClass.kext was installed improperly and cannot be used. How do I fix this?

Getting message - The system extension "/System/Library/Extensions/On/USBMassStorageClass.kext was installed improperly and cannot be used. How do I fix this?

That's not a valid path. You must have tampered with the system, or used some kind of "utility" that did. You should do a clean reinstallation of the OS after backing up your data and erasing the boot volume. Be sure not to restore whatever that is.

I get the error message:System extension cannot be used The system extension "/System/Library/Extensions/AppleUSBthernetHost.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

I get the error message after updating itunes:
System extension cannot be used
The system extension “/System/Library/Extensions/AppleUSBthernetHost.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
What or how do I fix this?

"I get the error message after updating itunes:
System extension cannot be used
The system extension “/System/Library/Extensions/AppleUSBthernetHost.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
What or how do I fix this?"
I have a MacBook Pro running Mas OS X Version 10.7.5
Is this a problem I need to fix? Is there a fix or update?

System extension cannot be used The system extension "/System/Library/Extensions/AppleUSBEthernetHost.kext" was installed improperly and cannot be used.

I need to install update on Quicktime. I have version 7.6.6. Updates are supposed to be installed automatically. Macbook Pro 10.6.8 can't update to current version? I am told:
System extension cannot be used
The system extension "/System/Library/Extensions/AppleUSBEthernetHost.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update

You can use Pacifist to just install that kext if you want from that update file...
Pacifist...
http://www.charlessoft.com/

The system extension\"/System/Library/Extensions/PACESupport.Kext\" was installed improperly and cannot be used.

The system extension\"/System/Library/Extensions/PACESupport.Kext\" was installed improperly and cannot be used.

PACE is a copy protection scheme for a piece of software you have installed, it's a kernel extension that loads when the computer first boots.
There was problems with PACE with the 10.6.8 update, it looks like Apple has recognized it and removed it when a update to 10.6.8 occurs.
Consult with your third party programs that use this kernel extension and mention your OS X version and request a update.

How do you fix the error - "The system extension "/System/Library/Extensions/IOBDStorageFamily.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update."

I have started getting this error every time I download anything to my computer. I want to know how to fix the issue so it dosen't happen anymore. The error is as follows:
The system extension “/System/Library/Extensions/IOBDStorageFamily.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
Please help me.

Darned drivers. Did you try using it without the drivers? They may already be in Mountain Lion. I'm super wary of vendor drivers for OS X; they're terrible and often an OS version out of date.
To re-install OS X, log into the Mac App Store, go to "purchased," re-download Mountain Lion, and double click "Install Mountain Lion" as you did the first time. You won't lose data (have a backup!) and an hour later you should be good to go.
After that, try using the printer WITHOUT installing the darned Lexmark drivers.

Help with this error message: System extenstion cannot be used:The system extension "/System/Library/Extensions/AppleACPIPlatform.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

I have this error message:
System extension cannot be used
The system extension “/System/Library/Extensions/AppleACPIPlatform.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
Please help. Is there a update or how do I reinstall?
Thanks,
John

I submitted the above question, later finding that it has been answered by Buller already. No one need reply as Buller's answer seems to solve the problem for others, and I'll try that.
Jim

What does this mean? What should I do? The system extension "//System/Library/Extensions/AppleUSBEthernetHost.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

What does this mean? What should I do?
The system extension “//System/Library/Extensions/AppleUSBEthernetHost.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.

You don't even have to type more than 8 letters:

What does this mean? ... System extension cannot be used ... The system extension "/System/Library/Extensions/IOFireWireWDHID.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

I get this message often when updating things. I have told Small Dog Computer where I buy my stuff, and they didn't have an answer. Thanks in advance.
What does this mean? ... System extension cannot be used ... The system extension "/System/Library/Extensions/IOFireWireWDHID.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

Interesting ... thank you! Actually I had that external drive, Western Digital, a while back on my second last? or third last? laptop ... the external drive died with a slew of pictures I had carefully uploaded to it :-(
I won't worry about it anymore :-)
sorry you got only 5 points, can't figure how to give you 10 points.

Message displayed: System extension cannot be used The system extension "//System/Library/Extensions/AppleUSBEthernetHost.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

Received following message during installation of an iTunes update today (9/16/14): System extension cannot be used. The system extension “//System/Library/Extensions/AppleUSBEthernetHost.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update. What is to be done about it?

Thanks for the reply. I'm not experienced in the inner workings of the iMac system and its programs, so please follow my train of thought as I try to find and understand your reply.
You wrote that I should check out "Please see - AppleUSBEthernetHost.kext error on installing iTunes update" and I did so.
There I found your reply of 9/1014 7:06 PM to j'ski stating: "There is a larger thread here which you may want to follow - system extension cannot be used AppleUSBEthernetHost.kext ."
And an earlier Post by Greg Earle of 9/10/14 5:57 PM stating: " You would have been better off doing open /System/Library/Extensions and then finding the AppleUSBEthernetHost.kext kernel extension icon in the Finder window that came up and moving it to the Trash."
And a subsequent Post on 9/15/14 at 2:59 PM by Rob Maurer stating: "This method worked perfectly for me. I am on a Mac Pro running Mountain Lion. Dragged the kext file to trash (I use EasyFind. Found the file, Revealed in Finder, dragged to Trash, entered admin password when requested). Downloaded iTunes 11.4 from the website. Installed from that download. Checked for that kext file in EasyFind again and found it had a creation date of 7/29/14 (the trashed one had a creation date from 2009). No more error messages. ITunes opens fine. Everything good. Will not update on my MacBook Pro until they fix this issue.
All of which leave me wondering - what is your answer/recommendation? Do I drag the kext file to trash, download iTunes 11.4 from the website and install it from that download, check for that kext file again to see if it has a later date than the initial one? And, if so, seed if iTunes opens okay or not? And if so, do not update iTunes again until Apple fixes whatever is wrong?

I received this error message: The system extension "/System/Library?Extensions/ACard6280ATA.kext" was installed improperly and cannot be used. Please try reinstalling ... . What is this about? What is ACard6280ATA.kext?

I received this error message: The system extension "/System/Library/Extensions/ACard6280ATA.kext" was installed improperly and cannot be used. Please try reinstalling ... . What is this about? What is ACard6280ATA.kext?

I'm still with you, just having a hard time wrapping my mind around the fact that you reinstalled OS X, which is like shooting a mosquito with a cruise missile, yet the problem remains.
Here is the KB article for your review: Reinstalling Mac OS X
Admittedly there is not much to it, but it should have eradicated the problem.
I would guess that the 17 "hp_" messages have something to do with Hewlett-Packard and in fact I do use an HP printer with the computer. I uninstalled the printer software and reinstalled it. The printer seems to work fine, but the kernel extension error messages still keep appearing. I'm inclined just to delete these 17 kernel extensions and then, if the printer doesn't work correctly, unintall and reinstall the printer software again. Sound sensible?
It certainly does. The only thing I can think of is that the OS reinstallation did not recognize those kernel extensions and left them untouched, AND the HP uninstaller did not remove them, AND the HP installer did not perform correctly. Having suffered through several HP botched software attempts I tend to believe that remains a posssibility.
If you are so inclined, I would remove the troublesome .kext files as you say, then reboot. Be prepared for the printer to stop working, but once you remove them try the printer again anyway. The vast majority of printers do not require any specific downloads since their drivers are already built into OS X.
As a last resort try reinstalling OS X again (I know...) and run Software Update to bring everything up to date. Apple released some new printer drivers a few weeks ago.
Finally, if this doesn't work post the same question as a new topic since I am out of ideas. A new topic will get more attention than unresolved questions with responses.

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

Hopefully, i can get some help in resloving the issue below. i updated my harddrive at Techserve and have been getting this message evertime i try to install a new software. Help...
The system extension “/System/Library/Extensions/CDSDAudioCaptureSupport.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.

That is a third-party extension, so I would reinstall that software unless you wish to try repairing the permissions on the extension yourself using the Terminal.

When installing iPhoto update, I got this pop-up -The system extension "/System/Library/Extensions/IOFireWireWDHID.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update. What does it

When installing iPhoto 9.2.1 software update, I got this pop up.
"The system extension “/System/Library/Extensions/IOFireWireWDHID.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update."
Is this a minor matter that can be ignored? Any suggestions on what I should do?

The faster (and way more recommended) way to do this is to run a permissions repair from disk utility.
Open Applications -> Utilities -> Disk Utility -> Click on Macintosh HD -> then in the right pane there is a "Repair Disk Permissions" button click on this. It should repair all permissions to their proper settings.
Another option is to manually repair them on this kext only. This involves opening Terminal and running the following commands.
sudo chown -R 0:0 /System/Library/Extensions/IOFireWireWDHID.kext
sudo chmod -R 755 /System/Library/Extensions/IOFireWireWDHID.kext
Otherwise if you don't have any firewire devices it doesn't really matter.

The system extension "/Library/Frameworks/PrivateTunnel.framework/Versions/Current/Extensions/tap.ke xt" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

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