After installing Mountain Lion doesn't external hard drives mount or stay mounted. Anybody else with this major problem?

After installing Mountain Lion doesn't external hard drives mount or stay mounted.
I have tried resetting my Mac's PRAM but the problem still remains.
Even USB memory sticks are unmounted efter a few seconds.
Anybody else with this major problem?

I have the same problem, although mine has not been solved by ESET update, finder settings, PRAM & SMC resets or anything else.
Don't get it, my external hard drive still works on both my housemates computers - one macbook pro (with snow leopard) and one dell, just not on mine with mountain lion.
Any ideas for me guys?

Similar Messages

  • Installing Mountain Lion onto an external hard Drive

    Hi
    I am running snow Leoprd and what to keep this as my main OS on my internal HD due to work, I want to install Mountain Lion onto an external Hard Drive and boot and run from an external HD as opposed to my internal
    I will be likely to be using a thunderbolt connection for the external HD
    Has anyone had any experience with this and any tip or faults?
    I will be using Logic mainly]

    Works just like installing on an internal drive. Just be sure to choose the correct target before clicking on the Install button.
    If you have sufficient space on your internal hard drive you could also make a partition on it in which to install Mountain Lion. This will be faster and more convenient that an external drive.

  • Can I install Mountain Lion on a different hard drive when it's already installed on one hard drive?

    I have a Mac Pro with two 2TB hard drives installed, one I use for storage, and one as my startup disk (also store things on there as well). I just installed two new 2TB drives and have set up a RAID 0 with them. I want to use the RAID drive as my start up disk, but I'm not sure if I can install Mountain Lion on the new RAID drive while it is still on the original start up drive. I also don't want to lose or erase any information from my current start up drive. Can anyone offer me guidance??

    Firstly, you need to partition and format the SSD. You need to be able to boot the computer from another drive that has a bootable OS X system installed or a Snow Leopard DVD installer that works on the computer.
    Install Lion/Mountain Lion on a New HDD/SDD
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
    Boot to the Internet Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
    Partition and Format the hard drive:
    1. Select Disk Utility from the main menu and click on the Continue button.
    2. After DU loads select your external hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.
    Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Install button. Be sure to select the correct drive to use if you have more than one.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

  • I am trying to re-install mountain lion on a new hard drive on a mac pro but get a backward slash with a circle

    I am trying to reinstall mountain lion in a mac pro with a new ssd drive but will not let me. It gives me a back slash with a circle. I have 2 optical drives, first is a blu-ray and the second is a super drive. could that be the cause?

    Firstly, you need to partition and format the SSD. You need to be able to boot the computer from another drive that has a bootable OS X system installed or a Snow Leopard DVD installer that works on the computer.
    Install Lion/Mountain Lion on a New HDD/SDD
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
    Boot to the Internet Recovery HD:
    Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
    Partition and Format the hard drive:
    1. Select Disk Utility from the main menu and click on the Continue button.
    2. After DU loads select your external hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.
    Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Install button. Be sure to select the correct drive to use if you have more than one.
    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

  • Cant install mountain lion on a new hard drive 2011 mac pro 17"

    for some reason I bought the infamous 2011 mac pro, and the hard drive kept having IN/OUT problems and after it destroyed half day of work, I decided to get a new hard drive, *blue WD 500g" but i have tried EVERYTHING and i just cant install mountain lion on it.
    1.- i tried forcing the recovery mode so It would connect to the internet and download mountain lion but after 10 min or so i trows the -2002f error at me
    2.- I tried to use the old hard drive that i put on a external hard drive reader so I could get the recovery partition but i just keep restarting the installation no reason given
    3.- downloaded the mountain lion and tried to installing it on the system hard drive of the laptop trough a computer running snow leopard but dosn't let me.
    4.- tried the same thing on target mode without success
    5.- using the recovery partition I used disk utility to se of the partition was locked but it was not
    6.- created a different partition to see if it would install it  there didn't work.
    i just don't understand why
    any toughs?
    if you answer this you would be a personal hero of mine
    cheers

    Make Your Own Mavericks, Mountain/Lion Installer
    After downloading the installer you must first save the Install Mac OS X application. After the installer downloads DO NOT click on the Install button. Go to your Applications folder and make a copy of the installer. Move the copy into your Downloads folder. Now you can click on the Install button. You must do this because the installer deletes itself automatically when it finishes installing.
       2. Get a USB flash drive that is at least 8 GBs. Prep this flash drive as follows:
    Open Disk Utility in your Utilities folder.
    After DU loads select your flash drive (this is the entry with the mfgr.'s ID and size) from the leftside list. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.
    Select the volume you just created (this is the sub-entry under the drive entry) from the left side list.
    Click on the Erase tab in the DU main window.
    Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
    Click on the Erase button. The format process can take up to an hour depending upon the flash drive size.
    Use DiskMaker X to put your installer clone onto the USB flash drive.
    Make your own Mavericks flash drive installer using the Mavericks tool:
    You can also create a Mavericks flash drive installer via the Terminal. Mavericks has its own built-in installer maker you use via the Terminal:
    You will need a freshly partitioned and formatted USB flash drive with at least 8GBs. Leave the name of the flash drive at the system default, "Untitled." Do not change this name. Open the Terminal in the Utilities folder. Copy this entire command line after the prompt in the Terminal's window:
         sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume
         /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --nointeraction
    Press RETURN. Enter your admin password when prompted. It will not be echoed to the screen so be careful to enter it correctly. Press RETURN, again.
    Wait for the process to complete which will take quite some time.

  • How do I re-install Mountain Lion on a new hard drive (replacement)?

    I have an older iMac 24" (2007) that has been up-graded to Mountain lion.  I want to replace my hard drive with a bigger one (has 500Gb).  How can I re-install Mountain Lion on my new drive?  I have Time Machine on this machine.

    Install 10.6 and 10.8 onto the new drive exactly how you did it on the old drive, except that you won't need to pay to redownload 10.8. Alternatively, if you kept a copy of the 10.8 installer, you can just rerun it.
    (72891)

  • How do I install Mountain Lion AND format the hard drive?

    I want to do a completely clean install of Mountain Lion.
    I had Snow Leopard installed, upgraded to Mountain Lion (by buying it from the App Store) but how do I tell it to format the drive and then install Mountain Lion?

    pforkes wrote:
    I want to do a completely clean install of Mountain Lion.
    I had Snow Leopard installed, upgraded to Mountain Lion (by buying it from the App Store) but how do I tell it to format the drive and then install Mountain Lion?
    Snow Leopard would have needed to be installed on a properly formatted drive, so I don't understand why you would need to format it again to that same format.
    Cheers
    Pete

  • Mountain Lion destroys 3 external hard drives any reason why?

    New Mac Book Pro Retina, Mountain Lion OS a all updates.  Each external USB hardrive including the main back up 3TB external
    blows apart with a message  you can no longer read or write to this drive, the exteranl, back it up immediately.  Go to do that
    it rebooted and now that drive as well as 2 others are not accessible.
    I have put 2 of the externals on my older Mac Book and I can get them to mount, and had to buy a new 4TB exteranal for
    backing up the older externals. I don't dare put that new one on the Mountian Lion new Mac Book Pro
    as I already lost years of work on the 3TB drive that will not mount at all.  Something is terribly wrong
    with this box or the OS  Anyone have any guidance?  I dread having all my externals and I have many that hold scads of my
    work, etc.  The 3T may not be repairable as I can't get it to be seen by any other G5Duo or Mac Books 2 different ones
    all run on Snow lepoard
    Help?

    As far as the older drives go, all may not be lost.
    It is possible that the USB interface in the box may
    be somehow hosed and the drive itself may be fine.
    You could pull the old drive out of the case and use
    one of the many USB->SATA adapters and hook up to
    the another computer.  This would at least tell you if
    you have lost all your data.  Make sure you get one
    with external powering like this:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16812232002
    Or if somehow the drive is corrupted, at least try to use
    some recovery software to get te data back.  If the drive
    is good, you can put it in another case.  If you have that
    much at stake, you have nothing to lose but a few bucks
    (price of a good meal soewhere) by trying this.
    BTW, what brand are these HDDs?  Mountain Lion in and
    of itself should not be causing the drives to be unreadable.
    There may be a serious hardware issue with the MBP.

  • How do I install Mountain Lion on a new hard drive

    Bit of a novice here.
    13inch MacBook Pro mid 2009 unibody user. Upgraded to Mountain Lion via download. I need to upgrade my HD for more space. No longer have the install CDs that came with it.
    How do I go about installing the OS on the new HD?
    Many thanks.

    As an additional thought:
    You may want to consider contacting Apple for replacement install disks anyway for whatever OS it came with because:
    Your license for Mountain Lion purchased at MAS is not transferable - it is forever tied to your Apple ID (and the machine ID). If you sell/gift your Mac, you will need to erase the Mountain Lion and reinstall the original OS; otherwise the buyer will have an illegal copy and will not be able to reinstall (because the Apple ID is not the same as it was when purchased).

  • My wifi is very slow after installing mountain lion on my Mac book pro

    My wifi is very very slow after installing mountain lion on my MacBook pro.
    What can I do?

    Ha  ha, I misread that as "My wife is very slow after installing mountain lion on my Mac book pro"
    BTW on my MBPro (late 2009 with max RAM) Mountain Lion runs very well with no slowing down.

  • Can't activate FaceTime after installing Mountain Lion

    After installing Mountain Lion, I opened Facetime and attempted to activate it using my Apple ID, this was what I got:
    "The server encountered an error processing registration. Please try again later."
    I created a new Apple ID and tried again; same thing. I contacted Apple Support for help. After hours of instructions, reboots of my MacBook, reinstalling Mountain Lion, and a lot of patience later., the outcome was the same. It just couldn't be activated.
    Today, I tried to activate Game Center, know what? Similar problem. This was the error message I've got:
    "The requested operation couldn't be completed due to an error communicating with the server."
    Any idea?

    Facetime for Mac community

  • How do i intall mountain lion on a new hard drive

    How do i do it?
    I bought a new 13" MBP a few weeks back and have now got my SSD. I realise that Apple no longer give out OS install discs and i don't have mountain lion purchased on my app store as it came with my laptop. So how do i install mountain lion on my new hard drive without having to buy mountain lion.

    Option 1  - Newer Mac's like your come with internet recovery. Which means if your drive fails or is corrupted or in your case your install a brand new drive, internet recovery will let you reinstall the OS you are eligible for. So replace your drive and boot your system with cmd + R keys pressed down for 15 secs or so and your machine hooked to the internet. This will install ML from apple in your case.
    Option 2 - Clone or backup (your entire system using time machine) your hard drive to a external USB disk. Replace your drive and then restore the new drive from the clone or backup.
    Check this site for related articles .... http://nyacomputing.com/category/os/mac-os-x/

  • IWeb doesn't sit in the dock after installing Mountain Lion? Why is that?

    iWeb doesn't sit in the dock after installing Mountain Lion? Why is that?

    Assuming you updated the OS on a Mac that has iWeb installed you will find iWeb in the applications folder. See this page for how to open your website when using Mountain Lion...
    http://www.iwebformusicians.com/iWeb/mountain-lion.html

  • After installing Mountain Lion on my Mac I have no Internet. Safari doesn't work.

    After install Mountain Lion on my Mac I don't have Internet. Do not know what has happened.

    Try a PRAM reset and an SMC reset.

  • Microsoft Word Intermittently Crashing After Installing Mountain Lion

    After installing Mountain Lion (10.8), Microsoft Word 2011 (v 14.2.3, currently the latest update) is intermittently crashing.  This is not the error I have seen reported elsewhere where Word crashses on start up.  Rather, it starts fine, runs for a while, then suddently freezes and gives an error message.  Unfortunately I do not remember the full error message, but it stated something like "Microsoft Office  cannot write to the hard drive..."  I was prevously running Microsoft Office 2011 and had no problems until upgrading to Mountain Lion.
    So far I tried repaired disk permissions, both via the disk utility application and by restarting while holding down the option key to boot into disk utility directly.  This did not solve the problem.
    I also checked the activity monitor, because after crashing the computer starts running very hot.  The activity monitor shows a process called "mtmd", which is using 50-80% of the CPU.  This activity seems to persist until the computer is restarted again. 
    I also checked fonts in Font Book, but there appear to be no duplicate fonts, which I thought might cause a problem in Word. 
    Any suggestions would be greatly appreciated.

    Hi there,
    I've been getting the same error message for teh last few days. Word and Mountain Lion seemed to be playing well together until the last MS update (now running Word 2011 14.2.3). Fans go into overdrive and always a reboot required. Additionally, my DOCX is gone from where it was saved and in place only a word.tmp file remains. Sometimes I can open the temp file and recover all of the data but sometimes not. Luckily Time Machine has saved me on both occasions when the tmp file wouldn't open.
    Excel and Powerpoint are currently running very smoothly (in fact I dare say better than previously).
    I've tried running the DOCX from local drives and two external drives all with the identical results.  However, after this occurring for the nth time I noticed that it seems to occur when Time Machine kicks in. I'm presently testing it with Time Machine turned off and all seems ok. Though it does kind of defeat the purpose!

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