OS X :: IMac Won't Start Up - Error Message Saying External Hard Drive Could Not Read
Feb 7, 2010
Ok so I have an 8800 GS imac, 3.06 intel core 2, 4 gigs ram. Running snow lepord. I need to resolve an issue where I can not get into OSX. At first I got error messeges saying my external HDD could not read, now it looks like its my primary drive because when I restarted I got the progress bar under the apple logo, indicating that something is wrong with the OS. The bar when to full 100% but then I got stuck at never ending spinning wheel. I restarted and no more progress bar but still the spining wheel of death. I really dont mind refomrating its just that I had some important text documents and other files that I cant get back without recoving them some how. How to proceed? I held down cmd v or s (i forgot) on startup and got a black screen with several problem statements. One reads the system boot strapper has crashed trace BPT trap.
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Sep 5, 2010
For some reason my Lacie external drive that's hooked up to my imac is constantly being read for no reason. It's never idle and never rests until I eject it. I'm afraid the drive's gonna fail soon and all my work gone? Did a search but can't find anything online.
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Jan 19, 2010
I bought a Guardian MAXimus hard drive and it seemed to be working fine for the past few weeks. Now all of sudden when starting my Imac 27 I7 the grey screen takes a long time then it get stuck on the blue screen and stays like that. Some times after being on the blue screen it will goto the main page but it takes 3-5 min if it does. When it gets stuck, if I unplug the firewire from the back of the computer from the hard drive it boots up. Any thoughts, their tech support wants me to send the unit back with out doing any testing at home to see what the problem is, seems like a pain in the butt.
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Jun 28, 2012
I can't figure how to unplug my exterior drive without getting an error message saying I have unplugged it unsafely....How do I unplug correctly?
Info:
MacBook Pro (13-inch Early 2011)
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Jul 6, 2009
I am sure this is a simple question, but I am having a problem going from windows to mac with an external hard drive. I can read and write to the drive on any windows PC. On my macbook pro laptop, I can only read. It will not let me write or erase anything to the drive. Does this have to do with the drives formatting? If so which format will let me both read and write on mac and pc?
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Apr 1, 2012
I have a Seagate FreeAgent GoFlex Desk external hard drive, which i've loaded movies, pictures, videos, and documents on to. I have only used up about 100GB of 1.5TB and for some reason when I plugged it in today it wont let me load anything onto it and if you click get info on it, it says you can only read.
Info:
MacBook Pro, Mac OS X (10.6.3), 13"
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Aug 27, 2014
I have 2 external hard drives one specifically for mac the other is for either mac or Windows base PC. I backed up on my mac using the time capsule back up now. When I attach to a usb ion my windows PC it wont read or even pick up either external discs, is this normal. How do I get files from my mac to windows based PC, it does work using a memory stick. But why won't PC pick up the drives.
Info:
MacBook Pro with Retina display, OS X Mavericks (10.9.4)
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Mar 25, 2012
I recently borrowed my brother's laptop to use as a media station for listening to music from, and watching movies, in order to free up some space on my main macbook. In trying to migrate some files over, I discovered that my hard drive, a 320 GB WD Elements drive, is having some problems which I've never encountered before. It has always worked fine in the past, but now I can't transfer any files to or from it, from either computer. In all of my troubleshooting, I've gotten various errors, (-36, -50), and various messages saying how the device can't be read or written from, or how some files contian unreadable data, etc.Disk Utility found an unused node when verifying the disk, and notified me that the disk needed to be repaired.I then used Disk Utility, which said it was able to successfully repair it, but the same problem remains, and after verifying the disk, it still says it needs to be repaired.I've tried to find any files that may be causing the problem, and was finally able to delete a seemingly troublesome file that was stuck in my trash bin from the external drive after trying various apps, (ie Trash It, Cocktail, What's Keeping Me?).This didn't end up solving anything...I've used terminal to eliminate some other potentially problematic files, with no luck still, and I'm not too confident with Terminal so I don't want to be messing around too much without more guidance.
I've used Disk Warrior to try to solve the problem, but still with no success.When I use the app to Check All Files and Folders, it does so for only a few seconds, then reports that "An unexpected error ocurred while attempting to perform file operations" for several files, and that several files' "Property list is damaged and cannot be repaired". When using Disk Warrior to REBUILD the drive, the app pauses for about 15 seconds, then says that it can't be rebuilt because it is in use.Again, I've used the What's Keeping Me? app to kill any activity with the drive, and the same error occurs.I've spent a lot of time trying to sort this out.
Info:
MacBook, Mac OS X (10.7.3)
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Jun 22, 2012
My external hard drive has reverted back to it's read-only form after a few weeks of running fine using tuxera so I can use my hard drive with my mac. Now tuxera or similar programs don't even recognise the drive.
Info:
MacBook Pro (13-inch Early 2011)
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Nov 14, 2010
I bought a Seagate Free Agent Go Flex External drive. I transferred all my files from my previous external HD.
When I went to access my folders on my external HD, the folders are all locked, with Sharing and Permission section in the Information "Everyone: Read" only! I can't change any of the information or move things! All of them are locked and "read only." I know how to change it, but only manually, individually. I have several hundreds of folders and I don't want to manually change all of them to "Read & Write." Is their a way to let me re-set the folders to "Read & Write" easily??
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May 21, 2012
I have an external hard drive(seagate 250 NTFS format) which i have used on my windows 7 computer now that i'm trying to load the information onto my macbook pro (10.7.4) it will not let me change the permissions nor duplicate the files. How can I be able to edit and save the information to my mac from the external drive??
Info:
MacBook Pro, Mac OS X (10.7.4)
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Apr 30, 2008
Within the last week, all of our computers have developed a 'bouncing E'! The entourage symbol jumps up and down and demands attention, there is a box saying 'Entourage could not read this .rge file', it never stops, it just comes back every half hour or so. I suspect it has something to do with sharing projects, but we have done nothing differently from normal so can't trace the reason. It's possibly linked to when one person sent an invite to all the others asking them to attend and event but I'm not sure.
It was also suggested it might be because there is a lot (ie up to 10 years in one case!) of email in the in box, but we have been doing some clearing out with no result. I don't know much about macs and am in the dark here, and everyone is blaming me as it was my idea to create a shared diary/contacts list in entourage. Some other forum said to find the corrupted file, but I've no idea where to look or even how to tell that it's corrupt.
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Dec 4, 2014
my External Seagate Hard drive just changed to read only on its own?
I went to get info and scrolled down to the Sharing and Permissions
But there is nothing there but a greyed out : You can only read
There are No boxes to check or uncheck, No options to change to read and write, No name of owner or ignore ownership box. NOTHING ELSE IS THERE
I have recently upgraded to Mountain Lion and am having other problems as well
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Jun 28, 2010
a friend of mine has some problems with her DVD drive.
It does not accept some video DVDs as it seems, but not always the same, that seems to be varying.
Also there is this strange error message, which I can't get my head around, as NTFS-3G should have nothing to do with CDs or DVDs, as they use a completely different and independent file system.
(it's a screenshot of a screenshot by the way.)
She runs Mac OS X 10.5.8 on a 15" Unibody MBP with 2.4GHz and 4GB RAM (early 2009) and has NTFS-3G installed to transfer data onto NTFS formatted drives.
Can anyone give any insight into this?
Or is Praha really a nice town after all the winter geese flew to Karlovy Vary?
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Apr 2, 2012
I have a message that pops up and disappears before I can get a chance to read it. I figured it may be an issue with an application since MS office 11 is installed and was running at the times also, before a reminder pops up a message appears. I fear there may be a potential issue with the OS or an application.
Info:
MacBook Pro, Mac OS X (10.7.3)
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Apr 12, 2012
I'm having some difficulty sending email from my account due to a mail server issue and it would be relly helpful if I could read the error message that drops down and quickly disappears when I attempt to send a test email. Is there any log that captures this so I can read it?
Info:Mac mini, Mac OS X (10.7.3)
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Mar 29, 2012
Can an iMac read a plug and play USB hard drive that was previously used for a PC. All of my *.jpg files are backed up on the portable hard drive.
Info:
iMac, Mac OS X (10.7.3)
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Apr 25, 2012
Recently my computer has been slow, having freezes, endless colorwheel/beachball, etc. I've deleted the whole disc and rewrited 0s to it, which fixed a bad sector error and seemed to help but its still freezes oftenly. I have come to the point where I think the HDD needs to be replaced and theres nothing else I can do.
Info:
iMac, Mac OS X (10.7.3), Early 2008 24" Intel iMac 2 GB RAM
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Dec 8, 2009
I just bought a new 1 TB external hard drive for back up purposes. When i connect it via USB to my Snow Leopard macbook pro, it gives me a "this disk not readable by this computer message". I click ignore, and it lets me do whatever i want to the disk - read, write, etc. I have tried repair disk - tells me it's good to go, and tried reformatting several times - thought not zero disk data or the 7 pass bs.
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Jun 20, 2012
I am getting a pop up error message with a yellow triangle and yellow exclamation point in Safari but it immediately disappears after it appears. This happens so fast that I cannot read the error message. A java applet for my bank's website is not running properly and knowing what the error message is might help solve the problem.
Info:
iMac, Mac OS X (10.7.4), 3.4 GHz Intel Core i7 mid-2011
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Jul 1, 2012
the only screen I get is the apple logo then an x, and ? mark. it keeps repeating this. computer was new to a backup on external hard drive. Iphotos were put on external then trashed. about 3200 images. I thought this was slowing it up. the macbook pro it is non functional now. aboaut a 3-4 year old computer.
Info:
iPhone 3GS, iOS 5.0.1
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Sep 18, 2007
The last couple of times I have woken my MBP up a box has popped up with a big red sign in the middle saying my external hard drive was removed unexpectedly and could have caused loss of data. I know this is not healthy and I would like to stop it doing this as soon as possible. It is connected via firewire 800 and is a western digital 250 gig my book pro if that makes any difference. I close the lid of my laptop with it still on and connected and everything is supposed to sleep. It used to work fine, I would open the lid and everything would wake up and I could do what I was doing before with no error messages and the hard drive would still be mounted on the desktop.
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Apr 26, 2008
I have a USB 2.0 hard drive that I have been using to back up movie files. It has let me transfer files from my Macbook Pro HD to it hundreds of times without any problems.
I have this .mkv file that keeps giving me an error when I try to transfer it to my external. I get "Sorry, the operation could not be completed because an unexpected error occurred. (Error code 0)".
I have transferred plenty of .mkv files to my external with no problems. All other files work fine when I transfer them. It will let me move my .mkv file around my Macbook Pro's internal hard drive but it won't let me transfer it to the external.
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Jun 20, 2012
I cannot see my external hard drive. I cannot see it in finder. When I started disk utility it says I need to repair but than it says it cannot be repaired. Is there a way I can reach the data? I don't know what happened to the disk.
Info:
iPad, iOS 5.1
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Apr 5, 2009
Is there any way I can boot up my external hard drive as a start up disk along with my internal hard drive?
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Jan 11, 2011
I have an external 2TB Western Digital Caviar drive hooked up to my 2006 iMac through a docking bay and USB 2.0. I'm running 10.6.6 and the drive is formatted as Mac OS Extended. It's my media and backup drive and I'm always copying stuff to and from it. All was well and good with the setup and I had no problems for probably 5 or 6 months. Just around Christmas, though, I started getting alerts when trying to copy files over to the drive. Error Code: -50.
Basically, I can still view/read files on the drive and play songs in iTunes, but if I try to rip a CD, iTunes hangs and dies. If I try to copy any file over using the Finder or empty the trash with files from that drive, I get the -50 code and alert. A restart will fix the problem for a little while but then it's back after maybe 30 minutes or so that's obviously not a good long-term solution. This page claims it is an "Error in user parameter list" but I have no idea what that means. I've done a bunch of Googling, but people are saying it's anything from problems with networked NTFS drives (which it's not for me) or that it's a disk permissions issue (no bootable system on the drive).
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May 10, 2010
I have a Late 09 15" MBP and a WD 1TB external HD. I've never had a problem until now. I start up the hard drive, then it loads up fine and the Mac recognizes it just fine. As soon as I try to copy something - doesn't matter how big it is - I get an error and at the end it says "(Error code - 36)". It just says the file cannot be read or written. Weird thing is I can access everything on the hard drive. Anyone have any tips before I try reformatting the HD?
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Jun 2, 2014
I am trying to copy my aperture 3 library (126GB) to an external hard drive to free up space on my local hard drive.
When it is at the final 1gb of the process I recieve an error message:
"The Finder can’t complete the operation because some data in “Aperture 3 Library” can’t be read or written.
(Error code -36)"
I have repaired the aperture library and repaired permissions and this did not work.
I'm running 10.9.3
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Jun 28, 2012
On restarting my iMac I get this message "Your Mac OS X startup disk has no more space available for application memory. To avoid problems with your computer, quit any applications you are not using, Closing windows and removing files from your startup disk will also help."
I have a 1 tb drive with over 400 gigs of space and 4 gigs of ram I have no apps running the computer seems stuck This started after my mac crashed while trying to print a 17 page document
Info:
iMac, Mac OS X (10.7.3)
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Jun 4, 2014
I was installing a few things on my new MacBook Pro (XCode, XQuartz, X11, and Homebrew) when I noticed some funky error message that I get whenever I open Terminal.
It says: -bash: export: `/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin': not a valid identifier.
I am still getting used to my Mac after a decade of Windows, and I have no clue what this error means or how to fix it.
Info:
MacBook Pro with Retina display
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