External drive not recognized by new mac, old still recognizes it

I have a portable external 1tb hdd. I just bought a new macbook pro and the old macbook pro currently recognizes the drive where the new one does not. Disk Utility shows no external drive connected. thoughts on why the new one won't connect with it?

I contacted Apple technical support. They had me run the Disk Utility to repair the external hard disk (no problems found) and then zap the PRAM, which is supposed to clear the power path to the firewire port (or something like that). After that I tried doing a backup, and it went to completion without losing contact with the external disk. I don’t know if the problem is permanently fixed, but progress is being made.

Similar Messages

  • AirPort Extreme External Drive Not Recognized

    I have an AirPort Extreme 802.11ac and am hooking up a Seagate 1.5TB external hard drive (USB 3.0 with backward compatability) to the USB port but it is not being recognized by Airport Utility. Does this need a power source? What am I doing wrong?
    I did reformat the external drive from NTFS to be Mac compatible (Mac OS Extended - Journaled) and when I plug the external drive into my MacAir, it shows up and is completely usable. Once I plug into the AirPort Extreme though, it goes into the netherland and I can't find it at all.
    Help?

    I have the HGST Touro USB3 drive that works fine with apple airport routers.
    I did try and establish a sort of database.
    https://discussions.apple.com/thread/5912861?tstart=0
    Contributions are sadly lacking but it already shows.. some work some don't.. some work with hubs some don't.
    To OP..
    As per Bob's comment.. you are now in Limbo.. since you don't know if the problem is the hard disk or the usb hub. And it is possible either or both are at fault.
    Look at OWC as they seem to specialise in external drives for Mac/Apple world. They sell hundreds of different USB drives.. I recommend you ring and ask their sales staff .. explain the problem and what you want.. a disk that works with model xyz airport.. like the Apple document show.
    Even from Australia we buy stuff from OWC as they have first class knowledge of apple systems. And if you look for specials they are excellent.. !!

  • External backup drive will not mount on new mac mini. still works fine on the old one. new one is running mavericks

    I just bought new-to-me mac mini running OSX mavericks.
    Trying to migrate from old mac mini using simpletech external hard drive.
    It still mounts on my old mac mini (system 10.5) but will not mount or show up when I plug it in to the new mac mini running mavericks.
    Any ideas?

    BDAqua wrote:
    What exactly shows in System Profiler>Hardware>USB for those drives?
    Boot from the Install Disc & see if they show up, not grayed out in Disk Utility.
    1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
    2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
    *Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
    We were thinking along the same lines. While at home I dug up a firewire enclosure and put a bootable GUID formatted drive in it (that I had in one of the usb enclosures) and started her computer holding down the option key and then chose to boot from the external firewire. All usb drives are now mounting upon connection. I asume that her drive has bad sectors on it (even though the SMART status says it's OK) and is not loading all the drivers properly for USB to mount. I was suspicious from the beginning that the OS was corrupt when she first had me look at it. It was at that point that I booted it in target mode, connected to my Macbook Pro, and then CCC'd to a usb drive that I had. I then had a couple of difficulties installing the new OS. Should have known......
    I am now going to put a new drive in it for her and she'll be up and running.
    Thanks so much for your help and thoughts that got me thinking as well.
    pax

  • New Toshiba 3tb external drive not recognized at startup WIn 7

    My new toshiba 3tb external drive (with wall wart power) is not recognized at start up (Win7). The message I get is that it is a USB storage device but can not be used until it is formatted (I already moved files to it). If I plug it in after start up it's fine and shows up as a toshiba storage device. I've used the 2.0 and 3.0 ports and it is the same problem (it has wall wart power). I have never encountered this problem with any other usb storage device  (an iomega 1tb and a WD 500gb) always plugged in and recognized at start up.
    Thoughts?

    Please provide your complete model number of your system.
    By doing so, we will be in a better position to provide you assistance.
    Thank you,
    -Kenna
    "Knowledge should be unrestricted and the most important commodity we can offer to help one another."

  • External hard drive not recognized on new macbook

    we have an external harddrive that we used as the time machine for our previous imac. we just bought a macbook pro, and the harddrive is not recognized and does not show up on the sidebar. it is however shows up on disk utility but i dont know what to do with it/how to get files from my old time machine. please help! thanks

    The hard drive will not show up on the sidebar or desktop unless Finder preferences are set to do that:
    In Finder's General preference section, make sure "External disks" is checked in the list of things to show on the desktop if you want to see them there.
    Likewise, in Finder's Sidebar preference section, make sure "External disks" is checked in the "DEVICES" section to see them automatically appear on the sidebar.
    But you don't need to do either for the MBP to recognize the drive, or to get files from its Time Machine backup set. To do that, you should use the Time Machine "Star Wars" interface. Pondini's FAQ's (already mentioned) tell you how to do that. Tip 17 is particularly relevant.

  • WD Essential 500GB USB External Drive Not Recognized

    I have a WD USB External Drive which was formatted for use with my old windows based PC. Bought iMac G5 and at first recognized but now does not and when i run disk verify in dissk utility get following error message:
    Verifying volume “My Book”
    ** /dev/disk1s1
    ** Phase 1 - Read FAT
    ** Phase 2 - Check Cluster Chains
    ** Phase 3 - Checking Directories
    Unable to read directory (Input/output error)
    Error: The underlying task reported failure on exit
    1 non HFS volume checked
    Volume needs repair
    Get same message when I try to repair, any help will be greatly appreciated

    Hello! I would try hooking it back up to a pc and run the repair function from there or erase the drive as Mac format and start all over. Tom

  • My Passport External Drive Not Recognized

    I bought a MacBook last week. I also bought a MyPassport for Mac external drive. I connected it to the USB port and installed the software. The icon for the drive displayed in the upper right hand corner. I received a message that there was a firmware update for the drive. After obtaining the download and installing it, the drive icon no longer displays. Time Machine used to display the drive, but does not anymore. Finder does not show it as a device. The software for the drive does not show the device either. Other USB devices work great. I plugged the drive to the old Windows PC and it recognized it. I must have changed a setting or something during the firmware update. Suggestions?

    Shteeg wrote:
    I connected it to the USB port and installed the software.
    Installed the software? Please explain.
    At this point, I think you need to format the Passport for Mac with disk utility. Your post sounds like you took a product that was Mac ready and windowed it.

  • External drive not readable on new iMac

    Hi, I recently bought a NEW iMac with USB 3 and Thunderbolt. I am upgrading from an OLDER iMac with firewire 800 and 400. The OLD iMac was operating on OSX 10.58. The NEW iMac is operating on Mountain Lion OSX 10.82. I have been using 4TB G-Drive for about 6 months on the OLD iMac. I connected the G-Drive to the NEW iMac via and I get the message: "the disk you inserted is not readable by this computer."
    I go back to my OLD iMac and the drive mounts fine. So I backed up the G-Drive to another external, connected it to my NEW iMac (via USB 3) and re-formatted it. Now it mounts on the desktop and is acting normal on the NEW iMac. However, when I connect it via firewire to the OLD iMac it no longer mounts on that computer and I get the message "the disk you inserted is not readable by this computer."
    What is going on?
    Whichever computer I format the drive with, it wont mount on the other. I've never encountered something like this! It is important that I am able to use this drive on multiple MAC computers as I am regularly moving between editing systems and collaborating with other people on various Mac computers. I don't think it is a firewire / USB 3 issue as it works with both cabels (once it has been formatted by either the old or new iMac). I am thinking it has something to do with Mountain Lion?
    Any ideas and expertese appreciated.

    Yes. The G-Drive required a firmware update which was provided to me by G-Drive Tech Staff.
    I downloaded the update and then after re-formatting the drive it now works with all computers (Firewire, USB 3, etc). The problem was connected to Firewire and USB 3.
    The file they provided was called: G-Drive USB 3.0 Firmware Update Utility.
    -Ben

  • Reinstall of OS: iTunes Library on external drive not recognized

    I've always had my iTunes library on my external drive. Now that I reinstalled my OS iTunes will not open the library. I've navigated to the correct library using the advanced preferences but that's not doing it. I've tried discarding the existing library in the music folder. Can't seem to find the answer.
    Thanks

    JS,
    I had some trouble following macmenno's instructions, but have had almost complete success. If you DO have your original itunes library file, this should work for you too.
    Background, my situation:
    My harddisk was failing but warned me, so i copied the ENTIRE itunes folder to an external drive. The iTunes folder includes the "itunes library" file, the music folder, and the xml file. This was suggested in a book i have on iLife as the best way to backup itunes to an external HD to preserve playlists, et al. But the book failed to say how to copy the folder back if needed.
    So the first time i naively just copied the entire folder back to the imac (new HD) but itunes failed to "find" it, even though it was exactly where i had deleted the equivalent default (empty) files/folder. Playing around i managed to get itunes to find the music but not the playlists and ratings...i.e., it was not finding the library file.
    Macmenno's instructions:
    I started all over: With Itunes closed, I deleted all three items from the itunes folder: the library file, music folder, xml file. to be safe, i also emptied the trash since itunes seemed to be following the files. But i left the itunes folder in place, albiet empty. Per macmenno's instructions, i then copied ONLY the itunes library file and the xml file from my external HD to the imac itunes folder. I then opened itunes, checked the preferences to be sure it was pointing in the right direction. I then dragged the Music Folder from the ext-HD and dropped it on the library icon in the itunes program window.
    That worked. i have my playlists, ratings, comments, et all.
    Only problem is i now have duplicate listings of all music songs -- one with an exclamation point that doesn't play (apparently came from my itunes library file before i dropped in the songs), one that does play.
    So macmenna, if you are still with us, how can i delete the 3,000 song titles with exclamation points? I tried to click on the column head to sort them all together, then block-mark and delete... but apparently we can not sort on that column head.
    Or did i miss something in your instructions?
    Thanks. and good luck to you JS.
    SB
    imac G5   Mac OS X (10.4.7)   itunes 6.0.5

  • WD external drive not recognized with 10.7.5 update

    I've got a Western Digital external drive that was working just fine an hour ago, then I installed the 10.7.5 update and now my Mac Pro is saying that it's not recognized by the computer and asking if I want to initialize it. I went to Disk Utility and the drive itself shows up but no disc image. It's connected via a RocketU USB 3.0 dual hub, which has also worked fine and aparently still is (it's recognized in my system report). I updated my drivers for the USB 3.0 hub anyways but still no disc being recognized.
    It's not a complete disaster because this is a backup disc, but I'd love to avoid having to back up all that data again (about a terabyte, which happens to be all my work files and iTunes files - it's a LOT of stuff). I also wanted to post in case this is some kind of issue with this current update, but I digress.
    This is what my disc utility currently looks like:
    The destination and source can't be the same (as is pictured) when doing a Restore, right? That accomplishes nothing but a blank drive, I'm guessing.
    I also have Drive Genius 3 and tried to "scan" the drive several times, all of them producing failure to scan results. I could try a bench test on the drive, but as I've already stated, it was working fine an hour ago. I'm pretty sure it's the update, not the drive.
    So is there any way for me to save the information that's currently on there or do I have to bite the bullet and re-backup all that data?
    Thanks for any help here. Every time I think I know what I'm doing on the mac I get something stupid like this that I should know but don't.  :-)

    Wow, no help at all. Thanks, Apple!! Another stellar performance. That's the last time I ever install an update as it comes up.

  • External Drive not recognized - lost ITunes library

    I installed the 7.1.x version of Itunes. When I rebooted, Windows would not start, I got a blue screen. So I did a restore in Windows from before the ITunes install. However, my computer now saw my external drive as blank and in need of formatting in order to be used. I housed all of my ITunes music on that drive.
    Is there any way to get the drive back, short of reformatting and starting over?

    The setting in Preferences only directs iTunes where to place new media when you import it. To locate a new library (or an old library in a new location), try launching iTunes while holding down the Option key and navigate to the library on the external when prompted.

  • WD Elements external drive-not recognized-can't reformat

    Hi- my son bought a WD Elements 1T external drive which he would like to use on his G4 (733mhz) Mac but when he plugs it in (it's a USB 2.0 drive-he has the older USB driver but it 'should' be backwards compatible I thought...) it doesn't come up in the Finder and when he uses Disk Utility it says there is an input/output error. It works just fine on the newer Macs we have in the house. is there any hope that this WD drive will work on his Tiger machine? We have googled and googled and no luch there. He called WD technical support which was a waste of time. Thought I'd post here to see if we get get some help, Judy

    Hi Judy,
    No reason it shouldn't work, but if the G4 only has USB1.1 it'll take forever to do anything at all on it.
    Did you try Formatting it on a newer Mac?
    It also won't be bootable on the G4... and even USB2 is much slower than Firewire/400.

  • ESata external drive not recognized on MacPro 2,1

    Hi. I installed Newertechnologys MacPro "Quad Xeon" eSATA extender cables from OWC into my MacPro 2,1. They connect directly to the logic board. I have tried connecting to OWC Mercury Elite-Al Pro Qx2 external drive bay and also tried an Eagle enclosure with a eSata port. No joy. Both drive bays are recognized on Firewire and usb, just not on eSata. The previous owner had used one of the logic board ports for an optic drive. Still had the cable attached to the port. I have tried multiple eSata cables from both ports. Am I missing something or are the ports bad? I see nothing in system profiler that would indicate that the ports even exist. Thanks.

    It makes sense that you cannot Hot Swap. You are not actually converting to eSATA (as you would with an added PCIe card) you are simply extending the cables (that Apple put there for INTERNAL drives) out the back of the machine.
    It also makes sense that these cables show up on the Serial-ATA, or SATA Bus.

  • Lacie External Drive not recognized

    I just unpacked and turned on my new iMac Desktop. Then I plugged in my Lacie Desktop external drive (with all my files, iTunes and iPhoto data) to move all of my files. But the Lacie Drive doesn't show up anywhere on the iMac when plugged in.
    I've tried turning both the drive and iMac off and on again
    Disk Utility does not see the drive
    i tried all USB ports just in case one was defective
    the drive does show on older laptops, incl. one with Lion installed
    I've contacted Lacie tech support but they aren't responding
    What can it be? what can I do??

    MeganEllen wrote:
    What can it be? what can I do??
    Why are you repeating yourself? That's unnecessary and disconcerting. As for your LaCie issue, return it and get one from a manufacturer that is responsive and makes things that work. FWIW, I never use USB HDs. They're slow when compared to FireWire ones. I roll my own and never have issues. These are the latest combos:
    Macally GS350SUA Hi-Speed eSATA/1394A/USB2.0 Storage Enclosure for 3.5inch SATA HDD w/Seagate ST3750640AS Barracuda 750 GB SATA 3.0GB/s Internal Hard Drive
    Macally GS350SUAB Hi-Speed eSATA/1394A/1394B/USB2.0 Storage Enclosure for 3.5inch SATA HDD w/Hitachi 1TB HD31000 IDK/7K Deskstar  SATA 7200 RPM 32 MB Cache Internal Hard Drive
    Macally GS350SUAB Hi-Speed eSATA/1394A/1394B/USB2.0 Storage Enclosure for 3.5inch SATA HDD w/Seagate 2TB ST32000542AS Barracuda® Green SATA 3Gb/s Hard Drive

  • External Drive not recognized anymore????

    Just hoping I can find an answer about this from the community since I'm so inexperienced with the technical stuff pertaining to my iMac.  For some odd reason, and I suppose it could just be that hard drives don't last forever, not sure, a My Book Essential External 3TB, USB 3.0 drive all of the sudden is not recognized by my iMac nor my MacBook Air.  Literally overnight it just stopped being recognized by my apple computers.  I had a whole bunch of data on it that I don't know how I'm going to replace it if I can't get an answer to this. The drives light comes on when the iMac system boots up in the morning, but it don't fire up (I think technically it's called initializing).  Any help/suggestions would be greatly appreciated.

    test with another computer even a windows computer should be able to detect it even if not mount it
    because of the filesystem not being native supported
    my wd my book ext 1TB usb2/eSATA/firewire died after 1-1/2 years after having problems spinning up a lot so I had to turn it on and off and on and off to get it to start
    toke the box apart and put the 1TB hd in another external case and there it worked so suppose WD are better at making hd's then the external enclosure

Maybe you are looking for

  • Realizar consumo local em processo de subcontratação

    Bom dia a todos os colegas, esta é a primeira vez que posto algo na SCN, então me desculpem se estiver postado em grupo errado ou de forma errada. Atualemente temos um processo de subcontratação na empresa onde fazemos enviamos os componentes para um

  • Please help. I can't email or open an ai file

    Hello, I have an online design class deadline for illustrator cs3. i created a jpg file and saved it as save for web. this was semi successful. I then took the same high resolution jpg document and saved it as the apparent original, ".ai" file. ***Fo

  • My ipod wont sync to my new computer

    i got a new computer and have itunes downloaded on it but when i plug in my ipod to the computer it shows up but not in itunes....HELP please XD

  • Cover Flow - Albums at the End?

    Cover Flow works well enough for me, it's just that there's a load (about 10-15) albums at the end of the list that aren't in any alphabetical order i.e. they're after Z and they're just in a random jumble. Is there any way to sort this, as it looks

  • Want to add Profit center in FB01 Fast entry variant

    Hi, I want to add the field Profit center in FB01 Fast entry variant, how to do this please ? Regards.