HT1338 my mac pro doesn't see my usb external hard drive what can i do?

I'm having a problem with my mac pro not see my usb external hard drive. Can someone tell me something I can do to get the mac tosee the external drive?
Thank you in advance.
George

Open Disk Utility (Applications > Utilities) and check the sidebar. If it's in it, select it and format it unless you have files

Similar Messages

  • My HP Pavilian dv6910 stopped seeing my USB external hard drive

    My HP Pavilion dv6910 stopped seeing my USB external hard drive. Up until 2 weeks ago I have never had a problem with the laptop reading and writing to my Seagate 500gb hard drive. I have  2 other computers that have no trouble working with the external drive. I thought maybe the circuit board in the external drive case was bad so I bought another one. Same thing. The Vista home premium software will not open the drive. Oddly enough, the drive is seen by the hardware manager and I can get volume information but Windows Explorer does not see it at all.
    The laptop has 3 usb2  ports and I have tried them all with the same results. I have other usb devises that work just fine on all ports.
    I thought maybe the driver got messed up so I did an auto search to replace and was told the current driver is ok.
    I do have a program called Advanced System Care Pro that auto cleans the registry (as well as many other things) and it might have removed something it should not have but I am not sure.
    I use the external drive for all my backups so I need to get this problem resolved as soon as possible. Can anyone help we with this?

    I meant reinstalling the operating system.
     There's a repair disc, but it's generally to repair a corrupted boot protocols.
     I had a look around and I can't find any place to download it either.
     Just thought if something _ you could try doing a hard reset.
     Shut down, remove the battery and adapter, hold the power button for 30 seconds.
     Plug only the adapter back in and boot up.
     Try you hard drive again _ give it a minute.

  • Rescue and Recovery doesn't see my wireless external hard drive

    R&R does not see my wireless external hard drive so I cannot backup - help?
    Thanks
    Bennie

    I've seen some versions of R&R refuse to show backups when their total space taken was at or near the limit set in R&R. In advanced mode, set the limit as high as possible and see if they appear.
    This is if you are working from the installed R&R. If you're running from a rcovery CD, never mind...
    Z.
    The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.  The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
    English Community   Deutsche Community   Comunidad en Español   Русскоязычное Сообщество

  • My new 24in imac doesn't recognize my usb external hard drive- snow leopard

    i was attempting to do a new time machine back up on my new mac but it won't recognize the usb external hard drive (kaser 250gb). i used it frequently on my old g5 imac, no problems. i plugged the hard drive into my g4 ibook and it recognized it right away. i followed the apple tip of pulling the power plug out of the wall power socket and pulled all the usb cables out as well (i have the wireless keyboard). i let it rest for over 5 minutes and only plugged in my wacom stylus and usb external hard drive. still nothing. and it doesn't show either in disk utility. i also downloaded as per another thread the 3g ntfs system preference but to no avail. the only thing i can of doing is erase and reformat my external on my ibook, but i don't want to risk loosing the data without a back up.
    anything else i can try? (before i buy time capsule) thanks

    i just checked again by plugging the external into my ibook g4 and checked how it was formatted - mac os extended (journaled).
    Then the 3GFS software is not required at all.
    i have an idea, not sure if it will work and it will have to wait a couple days until i get my firewire back from a friend, but this is what i'm thinking: my intel imac has a 1tb hard drive. could i use target mode between my imac and ibook? with my ibook i'd attach the external hard drive, then using the firewire and target mode start it up. hoping that the ibook hard drive and the attached external hard drive would show on my intel mac for which i could copy over the external back ups onto my imac. once completed, i could erase and reformat the external on my ibook and then try again on my imac to see if it appears on my desktop. do you think this might work (even though it is correctly formatted already?)
    I use Target mode on a regular basis for mounting the internal drive on a Mac to transfer or salvage data. I don't know if you will be able to connect to an external drive on the Target computer. There's not usually any reason for this and I don't know if the Target Mode will enable the Logic board to deal with the USB ports and transfer data. I kinda doubt it, but other more experienced users can jump in here.
    I don't think the problem with your external drive is the format, since you've already checked it and it is already formatted for a Mac. Intel Mac's will mount drives formatted by a PPC Mac with no problems, unless your OS doesn't support the chipset in the USB case that connects to the drive. There are some USB drives that are known to not work well with SL but worked fine with Leopard.
    You can buy a cheap USB case (about $30) and move the drive from the old case to the new case, or buy a USB to IDE adaptor cable (about $20), or you can buy a larger external drive that will work on the iMac and use the G4 to transfer the date from the old drive to a new one. Or you can take both drives to a friend with a Mac and use Disk Utility to restore the USB drive to a partition on the Firewire drive. That doesn't fix the USB drive to work with your new Mac, but unless the vendor comes out with a firmware fix, I think that's a lost cause anyway.
    other than the above, i may just go buy a 1tb time capsule,
    I would not be getting a Time Capsule to back up a single computer. Wireless backups are a lot slower than FireWire or USB (of course, it's the initial backup that takes so much time). If you do have several Mac's that need a TM backup volume, then the Capsule can help you out. It is supported by Apple (and there are a lot of users here in the forums). I'm using a ReadyNAS device for network backups, but it is not supported by Apple, and I have to rely on NetGear for fixes if an OS update breaks my backup system.
    BTW, it's a good chance that a TC device will be able to see and mount your USB drive. The incompatible chipset problem with some drives seems to be limited to the USB drivers in SL which the TC is not running. That's why I said that a USB hub may also let you see your drive, the problem is there's no guarantee's...

  • Mac mini does not see files on external hard drive

    Just got a new Mac Mini and this is my first Mac.  How do I get files from my HD to my new mac mini?  I backed up the files from my old laptop but when I plug it into my Mac, I don't have any picture or music files.

    I had the same problem but only after I upgraded to Lion. I could see the files on my external drive on other Macs using older software. It seems that Lion wasn't seeing old files on the external drive. So we accessed the files on a Mac using Snow Leopard, copied all the files into one new folder on the same external hard drive and now they're there on Lion. Problem solved! I hope this helps

  • Itunes doesn't see library on external hard drive

    I've been using itunes on my laptop (dell inspiron 2200) with an external hard drive to store my music files.
    About a week ago, suddenly, itunes won't "see" the music there. Both my music and my playlists are blank.
    I can "see" the external hard drive through "my computer" and my itunes preferences still say to look there for my music, but no go.
    Help

    If your pluging your hard dive in via USB you may have the same issue I have once and while with my external dive I put all my iTune files in. My hard drive has to USB plugs to get enough power to the hard drive. If I use only one and on battery power iTunes does not see it. But you said you can see it via my computer so you may have to check the place iTunes is putting your files again. In iTunes go to the edit tab on the top of the iTunes window pan down to Prefernces then go to the Advanced tab and at the top make sure your iTunes Music File Location is to your external Hard dive file you have for iTunes.

  • My macbook Pro doesn't recognized my Seagate External hard drive

    Okay I know some one has already posted this queston, but I am having issues as well. I have a 3TB Seagate external hard drive, and it accidnetly got unplugged without me ejecting it first. Now I can't get my mac or any computer to reconize it as a drive. It still runs, I can feel it running, but it is not connecting as a drive. I have an NTFS software on it, so I can read and write to the drive from both Mac/PC. I'm worried that everything on there got erase. Please can anyone help me out or help lead me to get so that my Seagate can be reconized as a drive?!!!!

    Oh I also had a message that came up when I tried to reconnect it to my comptuer. This is what the message stated:
    The disk you inserted was not readable by this computer.
    and my only options I have are
    Initialize..., Ignore, Eject
    what are my options of getting my data restored? I don't care so much about the drive, I am concern about my 2TB of data on there. Please anyone help me with this!!!!! I am open to suggestions to get my data back.

  • I can't transfer files from my mac to an external hard drive. what can i do?

    i have tried to transfer files from my mac to my external hard drive but i just couldn't.. help me

    leemamacita wrote:
    i have tried to transfer files from my mac to my external hard drive but i just couldn't.. help me
    More information would help. How is the external connected? Does the external appear on your Desktop? Has the external been formatted for a Mac? What method do you use to transfer files? When you try to move a file to the external, what does happen?

  • I cannot pass information from my Mac to my external hard drive, what can I do?

    Hello,
    This is my first Mac and I am new to all of it. I have an external hard drive that I use to use with my old PC . On the external hard drive box it says its compatible with both windows and Max os x. I can pass files from my external hard drive to Mac but I cannot pass files from my MacBook Air to my external hard drive. No messages comes up or anything explain why it simply doesnt allow me to do so. What can I do?

    Your hard drive is formatted NTFS for windows.  That format is read-only from OSx.  If it's not needed on Windows anymore, you can use Disk Utility and format it for the Mac.   Mac OS extended (Journaled)  - Partition Map scheme of GUID Partition table.
    Make sure to save any data from the drive as it will be wipped doing the above.

  • IMac doesn't recognise any USB external hard drives

    2011 iMac running on OS X 10.7.5
    1. I have tried 3 different hard drives now and none of them work on iMac but all work on Macbook Pro
    2. Not appearing anywhere - evenin in Disc Utility
    3. Tried to remove all other USB's in use and still no joy
    4. Tried to turn computer off and remove power for 10 mins and still no joy.
    5. The one I want it to work for is Seagate Backup Plus but like the others just doesn't see it.
    Can anyone give any further advice?

    Thanks BDAqua I tried your solution as I mentioned in point 4 or my initial discussion but this did not work.
    I only have a USB do you think I should buy a firewire cable and try that?
    My USB works for everything I've tried apart from portable hard discs.
    The firewire bug link you sent is obviously for firewire issues so I assume I don't need to read this until I have tried a firewire cable?
    What do you mean by this statement "If so, I suspect the AC PSU if it has one."?
    I'm not technical so couldn't understand the acronyms or how this statment tied in with the previous instructions.
    Thanks again for taking the time to help me

  • Mac Pro doesn't see third monitor

    Guys:
    My Mac Pro doesn't see all three of the monitors that I have hooked up...what am I doing wrong?
    I previously came to you for your expert advice about video cards...I went and upgraded my Radeon 4870 which was running two monitors (Eizo and NEC) to a ATI Radeon 5870 in order to run three monitors (my new Cintiq)
    When the Cintiq was not hooked up yet, the Mac saw the Eizo and NEC. When I connected the Cintiq...the Cintiq and the NEC show up but not the Eizo.
    I went and upgraded the video card so I could run all three monitors because I didn't want to plug and unplug the Cintiq whenever I needed it. I believe I did my due diligence as far as research was concerned to ensure this would all work together...I'll be pretty bummed if this configuration can't do three monitors not to mention the financial cost.
    Any help would be appreciated...as always.
    Thanks!

    I read your links, if I understand correctly, it may work with Dual Link DVI adapters?
    My monitor connections are:
    Eizo: DVI with the cord that came with the monitor (unsure if DVI single or dual link)
    NEC: VGA to mini display
    Cintiq: DVI to mini display (think it is a single link DVI)
    Thanks!...so what do I need to go buy?
    Here's a partial answer (need more info to answer about single vs. dual link, more about that later).
    In the Mac Pro (Mid 2010)... document I referenced above there's a key note:
    Note: The Apple Mini DisplayPort to Dual-Link DVI adaptor and Apple Mini DisplayPort to VGA adaptor are considered active adaptors.
    So if you get the apple mini-displayport to VGA adaptor that will count as one of the active adaptors.  I use one of those incidentially but I am not sure but it may be that all mini-displayport to VGA adaptors are consider "active".
    Now for the single vs. dual link DVI question.  It depends on the max resolution of those monitors (or the max you want to run them at).  Single link DVI has a max resolution of 1920 x 1200, while dual link DVI can display a resolution of 2560 x 1600.  So that's why I cannot answer this part of your question (you didn't specify the max resolution).  If you only need single link active adaptors they will certainly be a lot cheaper than dual link. 
    Also note, you should only need two active adaptors on the card to support 3 monitors.  So only one of the remaining connections needs to be an active adaptor.  The other can be passive (much cheaper).

  • Can I move all my photo that I can see on iPhoto from my Mac hardrive and put them on an external hard drive and still be able to see them as thumbnails in iPhoto? Thanks! The reason, I need to know if I can do this is b/c I am running out of HD space!sp

    can I move all my photo that I can see on iPhoto from my Mac hardrive and put them on an external hard drive and still be able to see them as thumbnails in iPhoto? Thanks! The reason, I need to know if I can do this is b/c I am running out of HD space!sp

    Make sure the drive is formatted Mac OS Extended (Journaled)
    1. Quit iPhoto
    2. Copy the iPhoto Library from your Pictures Folder to the External Disk.
    3. Hold down the option (or alt) key while launching iPhoto. From the resulting menu select 'Choose Library' and navigate to the new location. From that point on this will be the default location of your library.
    4. Test the library and when you're sure all is well, trash the one on your internal HD to free up space.
    Regards
    TD

  • Should I get a 2.0 or 3.0 USB external hard drive for my 2011 Macbook Pro? I need it to be compatible with the USB ports of both a PC and a Mac.

    Should I get a 2.0 or 3.0 USB external hard drive for my 2011 Macbook Pro? I need it to be compatible with the USB ports of both a PC and a Mac. I was thinking of getting a Seagate becuase apparently it is compatible with both systems, but I want to know which would be a better investment.

    Using USB 3 devices on Mac computers FAQ

  • I sent my 17inch mac pro to apple to install a new hard drive and my mountain lion was not on it when i got it back, using the same apple id i tried to re download it but it says i have to pay

    i sent my 17inch mac pro to apple to install a new hard drive and my mountain lion was not on it when i got it back, using the same apple id i tried to re download it but it says i have to pay

    never mind i got it by going into my account and veiwing hidden items and there it was

  • I did backup from my Imac to external hard drive, how can I unzip that backup to my mac

    I did backup from my Imac to external hard drive, how can I unzip that backup to my mac again

    It may be Time Machine, but Time Machine doesn't store backups in .zip folders. Open Finder and select your backup external disk in the Finder sidebar, under "Devices". If you are using Time Machine, you should see a folder called "Backups.backupdb".
    If you are using Time Machine and you want to restore a full Time Machine backup, there are different methods depending on the Mac OS X version you are using. Open  > About this Mac, see Version and tell me what version you are using

Maybe you are looking for