MacBook Pro :: Error - System Extension Cannot Be Used
Apr 6, 2012
I have a problem with Norton AntiVirus and have spent hours on-line with three levels of Norton Engineeers. Norton will not perform an idle-scan and loses its license on restart, requiring re-entry of the product key.
When removing Norton files for a re-install an alert pops up System extension cannot be used The system extension "/System/Library/Extensions/SymInternetSecurity.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update. As noted, I have spent many hours on the phone and LiveChat with Norton engineers. The last one has suggested I contact Apple Support for assistance. They will call back on Monday. I am running a 15" MacBook Pro (Early-2011), 2.3 GHz Intel i7, 8 GB 1333 MHz DDR3, OS X Lion 10.7.3, 512 GB Solid State SATA (Crucial)
Info:
MacBook Pro (15-inch Early 2011), Mac OS X (10.7.3), 2.3 GHz Intel i7, 8GB 1333 MHz DDR3
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Nov 24, 2009
I have updated HP drivers twice through Apple's Software Update and each time I get the following error: After dismissing the message I get a confirmation that the update was successful.
MacBook Pro
Snowleopard 10.6.2
2.16 Ghz Intel Core 2 Duo
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Jun 13, 2012
every time i have an update this will promt out, but the update still cary one sucesslly. do i need to do some thing with it our still ignore it? or do what it says? How to? The system extension “/System/Library/Extensions/WkClassicNotSeizeDriver.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update.
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Aug 31, 2009
I get this every time I boot.
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Jun 13, 2012
I just installed a number of software updates - iTunes, iPhoto, iMovie, etc. - and this message came up: System extension cannot be used The system extension "/System/Library/Extensions/Iomega/SAM.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.
Info:
iMac, Mac OS X (10.7.2)
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Sep 9, 2014
I responded to the upgrade of iTunes today - to version 11.4. I did this in short succession on a Macbook Pro and iMac, both running Mavericks. On both machines I got an error message immediately after the upgrade as per the attached image...
Info:
MacBook Pro, OS X Mavericks (10.9.4), iTunes upgrade - 11.4
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Sep 10, 2014
Installing latest version of iTunes (11.4) today led to the following error message: System extension cannot be usedThe 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.
I'm able to use my USB drive for Time Machine, and that appears to be functioning ok. And what does it mean for the continued safe operation of my MacBook?(Other than the distraction of getting a worrying error message that I take time out to report?)
Info:
MacBook Pro, OS X Mavericks (10.9.4)
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Sep 11, 2009
That's the message I got when adding a new printer driver. The reference was system/library/extension/cnqe202-classicnotseize.kext. Or close to that. I think I got that message also when upgrading to 10.6.1. As I recall there was also a note about updating this extension but no info on how to do it. Searching for .kext brought up a long list from last August having to do with crash reports with skype, real player, fire fox and a couple more; but nothing permanent and everything is working fine. Anyone have any thoughts about this? I'm using an iMac, 20".
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Jan 1, 2011
Keep getting "System extension was not installed properly" message at start up after attempting to instal upgrade osx (snow leopard 10.6) right now I have osx 10.5. How do I repair it. Can I use SL 10.6 on a 2006 IMac?
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Sep 25, 2010
As I understand it the MDP from the 5770/5870's have audio support. So does the cable from the new 27" LED display. Do MDP extension cables that can also carry the audio exist (e.g., is Atlona AT13032-2 such a cable)?
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Apr 11, 2010
I just downloaded Magnifique 2.1 for my Mac (Macbook, 13-inch, 2 gigs of RAM, Mac OS X 10.5). As soon as I open the application, I get an error message saying this:
Applescript Error
System Events got an error: Some data was the wrong type. (-1703)
The downloadable theme gallery won't show as well. This same message appears if I try to search for any themes and appears every time I type a letter or two into the search bar in the application. Is there any way to fix this? I have tried re-installation but it doesn't work.
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Feb 7, 2012
I recently tried to use bootcamp to install Windows 7 everything went good till I tried to reboot the Mac portion....I was greeted to a black screen that says missing operating system?
Info:
MacBook Pro, Mac OS X (10.7.3)
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Apr 11, 2012
The system extension /System/Library/Extensions/SyncRAIDExpander.kext was installed improperly and cannot be used. try reinstalling it, or contact the products vendor for an update. what does this mean?
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Jul 3, 2012
I was having some weird problems with file sharing on my network recently, so I tried changing around some of the permissions on my drives to see if I could resolve it. For some reason I was getting messages saying I didn't have permission to copy files from one computer to another on my network. This seemed to come on randomly as we have been doing file transfers this way for quite some time now. I looked at our file sharing preferences in the System Preference's and added all 4 drives from my Mac Pro in there and made sure that my username had full read and write capabilities. I then tried logging into my Mac Pro from my iMac, just like I've done in the past, and I was still unable to copy the files. So I removed all the folders and turned off file sharing. I then clicked 'Get Info' for my main Macintosh HD and tried changing the permission settings there. I clicked the option to make my username the owner, and then I clicked 'Apply to enclosed items...' and this brought up a progress bar that I let go for about 10 minutes. Then I got a pop-up error message stating "System extension cannot be used" and had an extension path listed underneath, saying it was installed improperly and cannot be used. This happens an endless amount of times. It seems to be giving me this message for every single extension on the computer. If I hold down enter the pop-ups just keep coming with different extensions listed.
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Jun 2, 2009
I did not have enough memory and I had already deleted some games in the past to do updates. Well I downloaded Windows XP Home about half a year ago and decided I really did not use it all that much. When I downloaded It i cut the memory in half (1/2 OS X and 1/2 Windows XP) So I went back to my Bootcamp installation papers to see how to properly uninstall Windows. So I did and everything seemed fine the only thing I thought was odd is that it only took like 3 seconds to uninstall so i knew it did not actually uninstall. I did not think much of it cause I could now download the update.
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Apr 23, 2010
I've had my MBP since Oct of 2007. About 2 weeks ago it would not turn on so I had the logic board replaced. After I got it back it would randomly shut down, the only solution I could do is take out the battery and work at the lower clockspeed but it still shut down without warning, just less frequently. I thought it might be the power cord or the battery so I got those replaced but it is still happening. The first day I had the battery (yesterday) it worked fine, no random shutdowns, I calibrated the battery per apple instructions and today it worked great (during charge up and plugged in at full charge) for about 5 hours, then it shut down, I turned it back on and it shut down shortly after, I reset the SMC by taking out the battery and holding down the power button and putting it back in and it shut down again.
Then I tried to run the hardware test and it shut down again so now I am posting this out of frustration. I also reset the pram and it shut down again. Now it won't stay on for more than getting through the login screen. I don't have applecare but they replaced the logic board for no cost (which I don't fully understand), I'd rather not take it back but I will if you guys have no ideas. I looked up (with difficulty) the previous shutdown code: -2 (http://www.macwizard.com/errors.html) and it said it was a "General System Error (VBL Mgr, Queue) -2 vTypErr invalid queue element" but I have no idea what that means.
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Dec 11, 2010
Ater charging it the other day I noticed a "service battery" error which went away the next. I checked the power section in the System Utilities and I noticed that my battery has shifted from "Good" to "normal" and I'm now at 469 cycles which I do not understand I also notice a very quiet humming-- I'm not sure if I'm just being paranoid and searching for problems or if there's a correlation amongst the issues. I've let the battery wear it self down and shut down and sit for a few hours and fully charge which has helped, but now it only holds charge for about 3-4 hours or so, opposed to the 5 hours I got when I initially bought it.
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Sep 9, 2009
When I try to install iTunes 9 I get the following message: "System extension cannot be used. The system extention "/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". ITunes installs anyway - even if I leave the message there without clicking "OK". I have verified my disk and repaired the permissions - yet still pops up.
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Oct 11, 2008
I have a Macbook - 2GHz, 1 GB RAM - I have also installed Windows XP in a separate partition, which has been working fine for more than a year now.the system(OS X) hanged so I had to to use the power button to shut it down. When I restarted the system initially I got the light blue screen for a very long time and again after restarting with the power button I got the message - "Error loading operating system"
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Dec 3, 2014
My MacBook air keeps slowing down and giving me the error message "Your system has run out of application memory". I end up having to force quit all applications and reboot, which fixes the problem for 10 - 15 minutes and then it starts over again.
I am on the road for work and won't be able to get to an Apple store until next week, but this is creating a gigantic headache for me. I found a bunch of threads on this same topic for Snow Leapord, but nothing pertaining to Yosemite.
Info:
MacBook Air, iOS 8.1.1
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May 10, 2012
i downloaded a hash app but it came with a .dmg.cc extension. what is the cc suffix?
Info:
MacBook Pro (13-inch Late 2011), Mac OS X (10.7.3)
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Nov 16, 2008
Something has happened in my Network preferences and I believe it happened while doing a Spotlight search. When I open the Network preference window, I get an almost instant error dialogue stating "Your Network settings have been changed by another application". As soon as I hit "OK" to dismiss the dialogue box, it comes right back. If I'm really quick, I can get back to the main preferences screen before the warning reappears. I've tried logging out, rebooting, trashing the Library --> Preferences --> apple.networkConfig.plist file (followed by a log-out) and nothing has made a difference.
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Oct 9, 2009
I have an iMac OS X 10.5 or 6? that was not getting past the apple logo and spinning gear, so I started from install disks, selected Disk Utility, and got the following messages. The lines in Caps were red
Checking Journaled HFS Plus volume
Checking Extents Overflow file
INVALID LEAF RECORD COUNT
(It should be 1454 instead of 1444)
Checking Catalog file
Missing thread record (id = 20796)
INVALID SIBLING LINK
VOLUME CHECK FAILED
ERROR: FILESYSTEM VERIFY OR REPAIR FAILED
I don't know where to go from here! Please help, I'm not Mac savy, so any suggestions need to be specific.
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Oct 31, 2009
I am getting an error on my iMac (running SL) that says: "You entered an invalid MobileMe member name or password. Verify your MobileMe member name and password in MobileMe System Preferences." Now, the thing is, I don't not have (nor have I ever) had a MobileMe account. This error only starting popping up after upgrading to Snow Leopard. It only gives me the option of clicking OK and pops up about every half hour or so.
I've check the MobileMe preferences and there is nothing entered in the username or password slot. I called AppleCare and they were not really familiar with the error either but gave me two options. They asked me to
(1) Reset my keychain to defaults and if that didn't work then
(2) Delete the SystemPreferences.plist file. I have done both and the error message continues to pop up.
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Feb 18, 2010
a few weeks back i tried to change my wallpaper and System preferences just hangs and Crashes and i get this error report:
Process: System Preferences [322]
Path: /Applications/System Preferences.app/Contents/MacOS/System Preferences
Identifier: com.apple.systempreferences
Version: 7.0 (7.0)
Build Info: SystemPrefsApp-1750100~6
Code Type: X86-64 (Native)
Parent Process: launchd [205]
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Mar 3, 2010
It won't go away and restarting doesn't.
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Aug 8, 2008
I'm trying cut out a few clips from this video and I keep getting an error message when I try to import the video into IMovieHD.The movie is saved as a .vob file on a cd. I have permission to use everything from the video but only need a few clips. When ever I try to import the video into IMovie i get the message
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Mar 12, 2009
I'm sick of the short power cord on my MBA, what are my alternatives. I need a longer cord to reach the power port at school. Sure i can carry a regular extension cord that I can get from walmart, but i want something more aesthetical, Mac looking.
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Sep 6, 2008
I'm having problems with a Boot Camp partition and XP Professional SP2.
I setup a 20GB partition on my drive (I'm using a MacBook Pro, 3GB, 120GB hard drive). It's the only partition other than the one I use for OS X.
I didn't have full-install SP2 discs, only an upgrade. So I went to Fry's and bought a legal, new OEM disc and license for XP Professional SP2, full-install. I ran the installer and all went well...until I rebooted. At that point, Windows wouldn't load giving me a non-system disc error.
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Apr 26, 2010
I'm trying to format a new external hard drive and it is not working. It is a Seagate 1TB Expansion drive. The box only says PC and Windows, but the guy said 'it should work on a mac too, as long as you format it on a mac', and other people on the internets say it should be fine also e.g. here.
So, when I go into Disk Utilities > Erase tab > change Volume Format to Mac OSX Extended > click erase, it gets about 2% in and then an error window pops up which says "Disk Erase failed. Disk Erase failed with the error: File system formatter failed."
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