HT1379 why do i need to resetting  PRAM and NVRAM

why do i need to resetting  PRAM and NVRAM

why do i need to resetting  PRAM and NVRAM
If you computer is working fine you do not need to reset this. It is not a maintenance procedure.
Mac OS X: What's stored in PRAM

Similar Messages

  • Resetting PRAM and NVRAM bring Bluetooth back

    My MBP Bluetooth menu lost somehow and could not connect to
    "Apple Wireless Keyboard" and "Microsoft Bluetooth mouse",
    the following steps seemed working:
    1. Resetting PRAM and NVRAM:
    http://support.apple.com/kb/HT1379
    note you have to "Hold the keys down until the computer restarts and you hear the startup sound twice".
    2. Connecting to "Apple Wireless Keyboard":
    http://support.apple.com/kb/ht1809
    ** "First unpair the keyboard If the unpaired Mac is within 33 feet
    (10 meters) of the computer your keyboard is currently paired with"**
    3. Connecting to "Microsoft Bluetooth mouse"
    http://www.microsoft.com/hardware/mouseandkeyboard/features/bluetoothhow_toconnect.mspx
    note you have to hold the connect button on the bottom of the mouse:)

    Most likely an issue with the system management controller interacting with the bluetooth host controller, it can be reset by doing 1 of these three depending on your situation:
    If you have a desktop computer: Unplug it from the outlet and anything plugged into the firewire/usb ports, leave it that way for 45 seconds minimum check it again and see if it mounts in disk utility
    If you have a laptop do one of these two steps and post back if it mounts:
    Removable battery: Remove battery, disconnect charger(power adapter), hold down power button for 5 seconds, put back in battery should resolve
    Embedded (non removable) battery: plug in the power adapter/charger, turn off computer, hold down on the LEFT side of the keyboard Shift-Control-Option. While your holding all of these press the power button once, let go of just the power button. Two seconds or so later let go of the rest of the buttons, you'll know this step was successful if it didn't turn on.

  • IMac screen is black, Resetting PRAM and NVRAM did not solve

    Hi
    My iMac screen just went black. I tried
    Resetting PRAM and NVRAM and the SMC but it didn't help.
    The computer starts up and shows the gray screen, but within a second it just turns black.
    I need help please!
    Thanks

    You can try to reset the SMC by unplugging the power cord from the back of the iMac for 1 minute. You can also try to start up to the install DVD by holding command+C on startup with the disc in the iMac. If it does the same thing after the SMC reset and when you try to start up to the install DVD I would take it to an Apple Store or Apple Authorized Service Provider for hardware tests.

  • I reset PRAM and NVRAM and PMU screen on ibook dark can't see

    Hello. My g3 ibook screen was changing from darker to okay. I read the forums about reseting pram and nvram and pmu. So, I reset the PRAM and NVRAM, scren went completely dark. It still would chime and boot up. Witha flashlight you could see desktop. So, I reset PMU, now no chime and still desktop is dark. What happened? I don't have a cable yet to hook it up to an external monitor. I ordered one on eBay, should have this week. What did I do to the ibook? More importantly what can I do to make it work again.

    Does adjusting the angle of the display make a difference? (A little forward or a little back?)
    Here is the link to Apple's Knowledge Base article on troubleshooting portables that won't turn on or start up:
    http://docs.info.apple.com/article.html?artnum=50959
    Maybe something there will help.

  • Will resetting pram and nvram on Mac osx help download problemss?

    I have a new imac which I play Sims 3 on.  The game plays really well but I am unable to download content from the official EA exchange website.  When I try to do this by clicking on the link everything freezes and I get the spinning rainbow curser.
    To troubleshoot this I have uninstalled, reinstalled and added latest patch.  I have tried safari and firefox browsers.
    A person from EA help said to reset the PRAM and NVRAM.  I have been told how to do this, but am a bit worried as it sounds a bit extreme?  The imac is only 3 days old and I don't want to break anything

    Phew problem solved!  Instead of using Safari I had to use Firefox.  But then I had to select some boxes...I did not do that the other times!
    If anyone else has that problem the answer is
    Open firefox
    -firefox
    -preferences
    -Applications
    Then scroll down to Sims3 and select Use The Sims3 (default)
    I have no idea what it all means but it works.

  • Resetting PRAM and NVRAM

    Is it ok to have a PRAM and NVRAM reset two times a week?

    No, it doesn't do any good unless you're having a problem that those procedures fix.
    Edit: I've never reset PRAM or SMC/NVRAM on 4 out of 5 macs. 

  • Cant reset PRAM and NVRAM!!!

    hi i having trouble with my macbook, and i need to reset the Pram but i cant i have been trying for more than 10 times and i cant reset the pram with cmd+alt+p+r. is there any other way to reset the pram,, maybe its cause i put a password on openfirmware?, i want to the rid of the password too!!! is the anyway to get rid of the password?
    i dont have any Os installed on my MAc so icant download any app

    Greetings,
    Read this article on the Open Firmware password: http://support.apple.com/kb/HT1352
    Enabling the password disables a variety of startup keys including the PRAM.
    Follow the section of the article for activating the Firmware password and in step 5 remove the check mark for "Require password...".  This will disable the firmware password allowing you access to the startup key combinations listed in the article.
    Cheers!

  • Resetting PRAM and NVRAM Revert System to 9400m?

    I just noticed this and was wondering if it was a common occurrence. If I have my MBP set to use the 9600m GT and I decide to reset the PRAM/NVRAM, will the computer automatically revert to the 9400m after such reset. I just noticed that my graphics settings changed by itself and could only draw up the PRAM/NVRAM reset as the cause. Is this the case? Thanks!

    Yes it is

  • Can I reset PRAM or NVRAM in a MacPro?

    Hi all,
    I'm on my second MacPro - Apple changed out the last one because of fan & bluetooth issues - and since the latest 10.4.8 update my fan is a bit louder than before so I thought I'd try the above as it worked on G5 machines. I know this has EFI or something wich is different to the G5s so any ideas?
    Also, where is the SMU reset button; is it the one in the RAM bay above the higher board or is there another?
    I'd like to add, this machine is giving a constant Airport connection of 3mb - 4mb + [on a 4.5mb link] whereas my previous one was lucky to give me 500k so it looks like the wires are being connected properly now?
    Thanks in advance to all :0)
    B

    Yes you can reset PRAM and NVRAM…
    http://docs.info.apple.com/article.html?artnum=2238
    … in a Mac Pro just like any other Mac.
    As for the SMC reset button. Apparently it's placed…
    "Press the SMC_RST switch that is located slightly below and to the right of the row of diagnostic LEDs. Use a non-metallic, non-conductive object, such as a wooden pencil."

  • Why am i needing to reset airport extreme almost daily?

    why am i needing to reset airport extreme almost daily? Is it just too old?

    Teresa,
    You haven't provided any useful information so it's almost impossible to help you. If you are really running OS X 10.2.x as your profile states then you are posting in the wrong forum, this forum is for Intel based iMacs that began shipping with Tiger 10.4.x. Also you haven't stated what Airport Extreme you have, there have been many models over the years. Once you locate which AE you have I'd recommend posting in the appropriate AE forum and try to paint a clear picture of what is happening and also provide the verison of OS X you're using, the Mac model and ever the firmware version of the AE you have.  You can find the firmware version by running Airport Utility.

  • Macbook Pros display blinks to blue, icons change size, resolution changes and cant reset. Anyone else have this and have a definitive idea of the cause? End up running diagnostics and resetting PRAM and SMC to resolve but why? Thanks.

    We have had several (7-10 recently) macbook Pros start this issue. The screen will jump from regular to blue, the background image will go away and it will be replaced with a blue screen, the icons change size and the screen resolution changes. Someimtes the users name field on the login screen will fly in from off screen... run diagnostics (AppleJack, Disk Util) and reset PRAM and SMC and sometimes this helps but wanted to know if there was a definite reason for this or a better resolution to the problem?
    Thanks all
    Macbook Pros are all newer (some only a month old) Unibody models running Snow Leopard and Lion

    AppleJack has been discontinued, so you should uninstall that.
    I'm suspecting something in software across all machine or a security breach as the primary cause of your problems.
    Wipe and install everything fresh, firmware update the router, change passwords, new software form original sources, etc.
    This might assist.
    Step by Step to fix your Mac
    WiFi security issues, at home and WiFi hotspots
    Harden your Mac against malware attacks
    How do I securely delete data from the machine?

  • HT1379 Guys please help? My MacBook Pro won't start up. I have tried the resetting Mac's PRAM and NVRAM procedure with no success. All I see is just the black or grey screen although I hear the drive running.

    Guys please help? My MacBook Pro won't start up. I have tried the resetting Mac's PRAM and NVRAM procedure with no success. All I see is just the black or grey screen although I hear the drive running.

    Hold shift key down while booting should get you in
    go through this list and get back with me
    Step by Step to fix your Mac

  • Why do I need Quick time 7 and Quicktime 10 ?

    I have just migrated from iMac5 (2.16 GHz) Mac OS 10.4.11 Quicktime 7.6.4 to a new imac 3.06 Mac OS 10.6.2 Quicktime 10.0.
    Some of my quicktime files play ok but others prompt me to download quicktime version 7. Why do I need to do this ? (There seem to be a lot of problems with this looking at the forums). All the files play on the old mac. Why isn't Quicktime forward compatible or why is there no import facility so that you can make your old files compatible ?
    Or am I missing something ?

    Some of my quicktime files play ok but others prompt me to download quicktime version 7. Why do I need to do this ?
    Because your system thinks you are missing specific codecs required for the playback of certain compression formats. In some cases this may be an installation problem in which the codec was "lost" or "orphaned" during the update process. In others it may be a need to update the component to work properly under the dual QT X/7 framework installed under the Snow Leopard OS. You need to check the Inspector/Finder Info or similar window to determine what specific codec is causing the problem and then re-install or update that specific codec/component/package.
    (There seem to be a lot of problems with this looking at the forums).
    Most of the problems are "self-inflicted" by individuals who, rather than studying the problem symptoms, analyzing them to determine their cause, and then fixing the problems, elect to immediately delete and re-install software -- often attempting to mix components from different operating systems and/or update versions of the software in their haste.
    All the files play on the old mac. Why isn't Quicktime forward compatible or why is there no import facility so that you can make your old files compatible?
    I am running both Leopard and Snow Leopard variations of QT v7.6.6 and all of my "old" files have remained compatible -- to include MPEG-2 video and a limited number of third-party supported compression formats. Since my configurations continue to work properly, my first guess is that you have an unresolved configuration problem or inability for your QT X 64-bit routines to communicate/switch properly with the 32-bit routines as required for your content.
    Why do I need Quick time 7 and Quicktime 10?
    Technically, you probably don't. However, as an old QT 7 Pro user who likes many of the QT 7 Player controls/options/features better than QT X's new but more basic features, I maintain both in active service and tend to use QT 7 as the default player of most of my work flows. Still, this is up to the individual. I am in no hurry to rush the changeover from an older but still more reliable QT technology to a more modern, but as yet, less mature and well tested "new" QT technology. In short, I feel it best to make the most of both dispensations during the development of this "new" version of QT.

  • TS3048 No bluetooth whatsoever on Macbook Pro 10.6.8, resetting PRAM and SMC does nothing. Help?

    Bought a wireless Magic Mouse today, was real pumped to go home and use it. When I turned my computer on, there was no bluetooth whatsoever to connect to. I read the forums for solutions, tried resetting PRAM and SMC. Neither worked. Let me know what I can do. 

    If the HDD will boot your MBP externally but not when installed in the MBP, that usually indicates a bad connection.. Either the connecting plug is not seated properly, ot the connecting cable is loose or faulty.  Open the MBP and check very carefully for those conditions. To repair or replace connecting cable is not an expensive repair, even at an Apple store.
    Ciao.

  • Service Registry: why do i need two bindings (wsdlDeployment and endPoint)

    based on the technical note of Clemens Utschig "Enabling a Dynamic, Reusable SOA with Oracle BPEL Process Manager and Oracle Service Registry" i have one question:
    why do i need two bindings (wsdlDeployment and endPoint) in my service in the service registry. if i only define the wsdlDeployment if get this messages:
    <2006-12-07 09:39:02,559> <FATAL> <default.collaxa.cube.ws> no endpoint found - nothing to adjust
    <2006-12-07 09:39:02,559> <WARN> <default.collaxa.cube.ws> Could not lookup base endpoint!
    the problem of defining two bindings is that the url to my partner is redundant.

    Hi Clemens,
    The UDDI Version 3.0.2 Specification (http://www.uddi.org/pubs/uddi_v3.htm) say this:
    B.1.2 Using the "wsdlDeployment" value
    Instead of directly providing the network address in the accessPoint, it is occasionally useful or necessary to provide this information through indirect means. One common scenario for such a behavior is when the accessPoint is embedded within a WSDL file. In such a scenario, the UDDI accessPoint contains the address of the WSDL file, and the client then must retrieve the WSDL file and extract the end point address from the WSDL file itself.
    In this case, decorating the UDDI accessPoint with a useType="wsdlDeployment" is appropriate. A sample of such behavior is as follows:
    <bindingTemplate bindingKey="uddi:example.org:catalog">
       <description xml:lang="en">
           Browse catalog Web service
       </description>
       <accessPoint useType="wsdlDeployment">
           http://www.example.org/CatalogWebService/catalog.wsdl
       </accessPoint>
       <categoryBag>
           <keyedReference keyName="uddi-org:types:wsdl"
           keyValue="wsdlDeployment"
           tModelKey="uddi:uddi.org:categorization:types"/>
       </categoryBag>
    </bindingTemplate>In the example above, a client would be able to parse the result of the bindingTemplate and determine the end point of the Web service within the WSDL file discovered in the accessPoint element. Note that the bindingTemplate has also been categorized with the "wsdlDeployment" value from the uddi.org:categorization:types scheme so that it can be discovered through a find_binding API call.
    1) This means for me that providing one binding with useType=wsdlDeployment should be enough.
    2) Sadly the "Business Service Control" of the Service Registry (Publish new WSDL service) does not create the correct structure needed by the bpel-engine. The "Publish new WSDL service" wizard just creates one service with one binding with useType=other (http). So if i want to reuse this published service from bpel (as a service consumer) i have to switch to the "Service Registry Admin Control" and create a second binding with useType=wsdlDeployment. But i don't want the developers to get inside the "Service Registry Admin Control"! They should only work with the "Business Service Control".
    All this makes the usage of the service-registry very unhandy and reduce the acceptance for developers because of unnecessary manual steps and broken security principles.
    My wish for this issue is that the "Publish new WSDL service" inside the "Business Service Control" of the Service Registry would additionlly create this needed binding with useType=wsdlDeployment.
    Best Regards,
    Harald Reinmueller

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