Splash screen says "System extension cannot be used The system extension "/System/Library/Extensions/PulseDriver.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update. How to fix?

Please help!
After installing iTunes 11.0.1 I got a splash screen that appears after all updates. The screen reads:
System extension cannot be used
"The system extension “/System/Library/Extensions/PulseDriver.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update."
Question: How do I re-install or replace this file?
Jim

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

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

Hi,
I started receiving the following error message (picture) about a week ago, and it has popped out every day. I have not noticed what triggers it yet.
Does anyone know what could it be and how to fix it?
Thank you!

Open the Script Editor in the /Applications/AppleScript/ folder, copy and paste the entire following line into it, and press the Run button:
do shell script "chown -R root:wheel /System/Library/Extensions/AppleUSBEthernetHost.kext" with administrator privileges
If it doesn’t work, choose Go to Folder from the Finder's Go menu, provide /System/Library/Extensions/ as the path, throw the AppleUSBEthernetHost.kext item away, and reinstall iTunes.
(123201)

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 I'm super wary of vendor drivers for OS X; they're terrible and often an OS version out of date.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.

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?

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?

Buller? Anybody? The system extension "/System/Library/Extensions/ZD1211Mac.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update. This has been going on for a while.

Anyone find a fix for this? Most programs installed invoke this error.
The system extension “/System/Library/Extensions/ZD1211Mac.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.

That driver appears to be for a Zydas wireless usb adapter. Zydas has been through a couple of different acquisitions and no updates appear to be available, so you'll probably need to delete that extension.
Regards.

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.

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

The system extension “/System/Library/Extensions/IOSCSIArchitectureModelFamily.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
i keep getting this when i connect my ipod nano 6th gen to my Mac Mini. I am running the latest OS and the Latest Itunes. Not sure what the problem is.

For everyone with this problem:
Repair Disk Permissions.
My USB drive is recognised again, few!

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. How do I do it, please?

I keep receiving this message, "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." How do I do it, please?

I couldn't find the extension to get rid of it.
In the Finder, follow the path given above: "System/Library/Extensions/AppleUSBEthernetHost.kext"

"System/Library/Extensions/CDSDAudioCaptureSupport.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact product's vendor for an update. Can anyone explain what it refers to.

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

Please take a look at Kappy's solution and the following comments about Toast.

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.

Splash screen says "System extension cannot be used The system extension "/System/Library/Extensions/PulseDriver.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update. How to fix?

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