OSX 10.9 UBS would not recognize devices removed or ejected when re-connected without a reboot.

OSX 10.9 UBS would not recognize devices removed or ejected when re-connected without a reboot. First saw this with my Time Machine backup drive.  Ejected it to put it into a different USB port and Finder never saw it unless I rebooted.  Next it happened with my Logitech HD Pro Webcam C920. Skype recognized the device, but no video feed (audio microphone did work).  Unplugging and replugging the Webcam (and closing and restarting Skype) had the same result; had to reboot the computer (MacBook Pro Retina 15.4, 16 GB RAM) to get it to recognize the device. 
Next had a meeting on another new MacBook Pro Retina 15.4 in our conference room hooked up to a 36 inch monitor and the same Logitec Webcam model (not the same device) connected directly into the MB Pro USB port; same exact problem as above. 
Any thoughts?

I have a powered USB 2 hub connected.  The problem remained whether or not the devices were plugged in directly or through the hub.  Beyond that, the camera is a USB 3 device...  Thanks, but any other thoughts?
Peter M

Similar Messages

  • Been trying to use an external memory card reader with my macbook air- connecting via usb port, air does not recognize device nor the microSD card from my gopro - help

    Been trying to use an external memory card reader with my macbook air… connecting via usb port, air does not recognize device nor the microSD card from my gopro … help

    Some external ones do not work with the Mac's although most do. There are some driver compadibility issues with Mavericks, so I would wait for an update.

  • I have an ipod touch  and Itunes does not recognize device.  What can I do?

    I have an ipod touch  and Itunes does not recognize device.  What can I do?

    See:
    iOS: Device not recognized in iTunes for Windows

  • After attempting to update to latest software, iphone 4 stuck showing connect to itunes picture screen, computer will not recognize device, have tried restarting/restoring/hard reset/every suggestion listed on apple troubleshooting website. thoughts?

    after attempting to update to latest software, my iphone 4 is stuck showing "connect to itunes" picture screen. My computer will not recognize device. I have tried restarting/restoring/hard reset/reinstalling itunes and every other suggestion listed on apple troubleshooting website. thoughts?

    The next step is to try recovery mode as described here:
    iOS: Unable to update or restore

  • I bought Studio MX in 2006. I have the CD and the serial Num. but when I tried to reinstall it, it would not recognize the serial number. I registered the product in 06. Back then it was called macromedia.

    I bought Studio MX in 2006. I have the CD and the serial Num. but when I tried to reinstall it, it would not recognize the serial number. I registered the product in 06. Back then it was called macromedia. 

    MX 2006 is so old it's no longer supported.  See if this helps you.
    Error: Unable to Activate | Macromedia products
    Nancy O.

  • TS1410 my itunes 9.2 (mac osx 10.4.11) does not recognize iphone 4s

    my itunes 9.2 (mac osx 10.4.11) does not recognize iphone 4s

    Since you're running iTunes 9.2, your Mac has a G4 or better CPU. You need to purchase and install Mac OS X 10.5(G4 or G5) or Mac OS X 10.6(Intel) from a DVD. Mac OS X 10.6 DVDs are free for paid MobileMe members.
    (66714)

  • HT4623 e while updating iOS. When connected to PC & iTunes get the message in recovery mode, must restore.   I have followed the steps to restore and still have the iTunes screen showing and iTunes still does not recognize device.

    iPad 2 froze while updating iOS 7.0.4.  When connected to PC & iTunes get the message in recovery mode, must restore.   I have followed the steps to restore and still have the iTunes screen showing and iTunes still does not recognize device.

    Sorry if we didn't get to your question fast enough; we are all volunteers doing this in our spare time. Try the steps in this article. If you're unsuccessful, you'll need to take your device to the Genius Bar for an evaluation.
    http://osxdaily.com/2010/12/04/ipad-dfu-mode/

  • Macbook does not recognize external USB drive - except when booting with CD

    Hi all,
    I recently swapped my Macbook's internal HD (Toshiba 100gb 5400 rpm) into an external USB enclosure (Eagle Consus). The computer does not recognize the external HD, even when using two USB cables for extra power. No luck with safe mode or resetting PRAM. Disk utility just hangs with spinning wheel if I start it. Switching the USB ports does not help.
    I thought it might be a power problem until I noted the following:
    1)The external drive works fine if I boot the Macbook from the Mac OS install CD... with this I can run disk utility and scan the drive with no problem
    2)It works fine on an old Mac Mini with only ONE of the USB connectors plugged in
    3)The enclosure worked fine on the Macbook when I had the new drive in it (320 GB 7200 RPM) while copying the files over
    Any thoughts?
    Many thanks,
    --T

    It is actually using a power supply, yet it will not actually power on unless it is connected to a computer's USB port. At least this is how it works on my old desktop running Windows 2000. When you disconnect the drive from Windows, or put the machine in hibernate mode, the device actually shuts down. It powers back up once the machine wakes up from hibernate mode.
    It's a somewhat older device which predates the Macbook Pro, but it claims to support older Mac, such as the G3, G4, G5, iMac, iBook. OSX 10.0.4. So perhaps it's just too old?
    It's a Buffalo HD-HB250U2 (250 GB).
    So you're in Japan too?

  • Ipod touch is not syncronizing is not even on the list of devices on itunes even when I connect it, is not syncronizing wireless either HELP

    ipod touch is not syncronizing is not even on the list of devices on itunes even when I connect it, is not syncronizing wireless either HELP
    I have some updates in regards my music that I want to upload to mi ipod touch 4th generation 64gb and my computer recognizes the IPOD connected via usb but my computer on  itunes doesnt have any info about it, I don't want to reset all the settings becuase I spent a lot of money on you guys and simply mi ipod is not syncronizing I DEMAND help please also my ipod is not syncronizing wifi it says: "syncronization will be done when VAIO (my laptop) is available" but my computer  IS AVAILABLE WHAT IS WRONG WITH THIS DEVICE someone better get me a resolution this is a huge inconvenience. I am going to stop puchasing apps and music if this is not resolved I DON'T want this tutorial http://www.apple.com/la/support/ipodtouch/assistant/itunes/ or this http://support.apple.com/kb/HT1808 those are not even close to the new update Apple did to ITunes

    This will help: http://support.apple.com/kb/HT1212 : iPhone, iPad, iPod touch: Wrong passcode results in red disabled screen

  • TS1363 My ipod will not turn on at all.  When I connect it to the laptop by the USB, it does not recognize it at all.  What could possibly be the problem?  The Nano was working like 30 minutes ago.

    About 30 minutes ago, I was adding some music to the ipod Nano.  Everything was working fine.  Now, the ipod will not turn on at all.  When I connect it to the laptop with the USB, the computer does not even recognize it.  The screen has a fant image of the plug on it and it says connected.  I followed the procedures for disconnecting it when I was finished with it earlier.  Any idea what is going on here???
    Thanks

    It probably needs to be reset. The procedure is different for different Nano models: http://www.apple.com/support/ipodnano/assistant/itunes/

  • Do not recognize the exact Serial Number when Setup.

    Do not recognize the exact Serial Number when Setup.
    Invalid Serial Number. This is not a valid serial number.
    Prease go Back and re-enter your serial number.
    I am a old Korean.
    I can not speak and write English well.
    So I write this letter, as translated by Google Translator.
    I ordered the PremiereElements 11 July 2, 2013.
    I received an email from Adobe after I paid the price.
    Serial number is
    [personal information removed... Mod - https://forums.adobe.com/docs/DOC-3731]
    [This is an open forum, not Adobe support, please do not post personal information]
    I have downloaded the "PremiereElements_11_WWEFDJ_win64.exe".
    And I installed the program and I made some movie clips.
    I used the PremiereElement11 well until this morning.
    When I click a button for importing a clip, PremiereElement11 show me a error message.
    "Cannot find a file", "Reinstall".
    So I reinstalled.
    In the "AdobePremiereElements11-Setup popup window" I wrote my name and select my Country and wrote serial Number exactly.
    And clicked next button.
    But "AdobePremiereElements11-Setup popup window" said
    "Invalid Serial Number".
    and
    "Invalid Serial Number. This is not a valid serial number.
    Prease go Back and re-enter your serial number."
    I have tried many times.
    As a result, I did not install.
    How can I fix this?

    marusot
    Google Translate from English to Korean
    당신이 프리미어 요소 (11)와 현 버전이 아닌 12을 가지고 있기 때문에 어도비 채팅 당신을 도울 경우, 나는 확실하지 않다. 그러나, 그것은 것입니다 있는지 확인하기 위해 어도비와 어도비 채팅에 도달하기 위해 시도하십시오.
    http://helpx.adobe.com/contact.html?step=PRE_adobe-ID 서명 - in_stillNeedHelp
    어도비 채팅이 도움이되지 않을 경우, 우리는 여기에 우리가 할 수있는 최선으로 도움을 시도 할 수 있습니다.
    당신은 1 사용중인 컴퓨터 운영 시스템?
    2 당신이 프로그램을 다시 설치하는 경우 비활성화 바이러스 백신 프로그램과 컴퓨터의 방화벽 (들)이 있습니까?
    우리는 당신의 결과를보고 할 것이다.
    감사합니다.
    ATR
    English Version of the Above
    Since you have Premiere Elements 11 and not the current version 12, I am not sure if Adobe Chat will help you. But, please try to reach Adobe and its Adobe Chat to find out if it will.
    http://helpx.adobe.com/contact.html?step=PRE_adobe-id-signing-in_stillNeedHelp
    If Adobe Chat does not help you, we can try to help here as best we can.
    1. What computer operating system are you using?
    2. Do you have the antivirus program and firewall(s) of the computer disabled when you are reinstalling the program?
    We will be watching for your results.
    Thank you.
    ATR

  • My iPhone 6 is disabled as I have forgotten my passcode. I have not synced it with any other device/icloud, etc. When I connected it my MacBook and opened iTunes, that is also asking for passcode. Pl help.

    My iPhone 6 is disabled as I have forgotten my passcode. I have not synced it with any other device/icloud, etc. When I connected it my MacBook and opened iTunes, that is also asking for passcode. Pl help.

    Hi ..
    Follow the instructions here >  iOS: Forgotten passcode or device disabled after entering wrong passcode

  • Firefox crashed how do I get it back..I tried to remove it and reload but it would not let me remove it. What can I do? thank you

    firefox crashed how do I get it back...I tried to remove it and reload but it would not let me remove it. What can I do to get it back? thank you!

    firefox crashed how do I get it back...I tried to remove it and reload but it would not let me remove it. What can I do to get it back? thank you!

  • I am having trouble trying to boot from my lion osx install disk on a 2007 macbook.  The disk ejects when I start up with the option key depressed.  Anyone have any ideas?

    I am having trouble trying to boot from my lion osx install disk on a 2007 macbook.  The disk ejects when I start up with the option key depressed.  Anyone have any ideas?
    Thank you.

    How did you get a Lion OSX install disc? They don't exist. Do you mean the gray disks that came with your 2007 MacBook?
    If you mean the gray disks, try starting up with the "c" key held down.
    What version of OSX is on your MacBook now? Have you tried booting from the Recovery partition?

  • Why does not ipad show on itunes? when i connected with my macbook using usb, just it is charging electricity.

    why does not ipad show on itunes? when i connected with my macbook using usb, just it is charging electricity.
    i don't know why...

    Sometimes it can be something very simple and easy to fix. Before you get into any involved troubleshooting, quit iTunes, restart your Mac, restart your iPad and then try to sync again.
    Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
    If this doesn't work, then try the more involved stuff.

Maybe you are looking for