Intel Mac :: Won't Boot From Hard Drive Or Disk?
Apr 1, 2012
Gray screen and 'prohibited' logo appeared today without apparent reason.Forced a power down by holding power button. Restarted....eventually reached user login screen but froze again on login attempt after password entered.
Restrated again by forced power down but only got gray screen and spinning gear.
Have now spent many hours going through most conceivable options including...
following instructions on http://support.apple.com/kb/TS2570 re gray screen troubleshooting
have disconnected peripherals; reset smu, smc, and pram;
safe boot w shift key did nothing;
safe boot shift+v produced a screen of text that got as far as com.apple.launchd 1
but then several lines of text appeared repeating twice eaxctly same, each headed by disk0s2: I/O error. with [ErrNo 5], then
dyld: Library not loaded: and Reason: no suitable image found
final line ends with The System bootstrapper has crashed: Trace/BPT trap:5
I have tried installing from the original install disk several times but holding C key or Option/Alt key or D key gets no response and I cannot get the install disk to eject either holding down mouse button, eject button
I haven't done any recent upgrades or installed new software, no new peripherals attached.
Is this a dead hard drive or does someone have other suggestions that might work?
Info:
iMac, Mac OS X (10.7.3)
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Apr 11, 2010
I am considering purchasing diskwarrior but want to make sure it can help my situation before I purchase it. My imac will not boot from the internal hard drive (Intel processor) When I use disk utility to try and repair the disk, I get error messages and it won't repair. I can see the HD but cannot repair it. When I connect using target mode with my mac book pro, the hard drive does not appear on my host (macbook pro) computer. I have reloaded OS X (Leopard) onto a firewire external drive and can boot my imac that way but I can not find my original internal Macintosh HD. Will disk warrior be able to help with this scenario. I would really like to access that internal Macintosh HD and retrieve my files.
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Jun 1, 2014
The problem is that the mac will not boot period.When I press the Option on start up, it takes me to a screen where I could select to boot from the Macintosh Hard disk or Recovery 10.9 disk.Choosing either of these still does not boot up the computer.
I think that the hard disk is damaged but what I do not understand is why I can still get the option to choose the Hard disk or the Recovery disk.I am waiting to hear from Apple Support on when I can take my imac to the genius bar and I was wondering if there is anything I can do before then. Intel imac 27-inch bought refurbished in November 2010 with imac apple care.Intel quard core processor, 4 Gig RAM, 1 terabyte HD
Info:
iMac
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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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Mar 8, 2012
My internal 1TB hard drive on my iMac is dead and I don't have the money to replace it at the moment. I have everything backed up on an external 1TB drive using Time Machine. As a workaround for the time being,Is there any way I can install the system on the external drive and use that as the boot drive without erasing the Time Machine Backups? It seems to me I would have to have two partitions for the external drive, one for the system, and one for Time Machine. But is there any way to add a partition without erasing the existing one with Time Machine only on it?
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Jan 31, 2012
[URL]
I have made sure my Mac hard drive is the main one which it is, i formatted it and also repaired it and nothing is working.
I have an HP and a Seagate external hard drive hooked up to my mac also and the Verbatim is the one that gives me the issue so I dont know whats happening..
Info:
iMac 21.5" + Macbook White Unibody 13" + iPhone 4
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May 2, 2012
just updated to 10.7.3, then cannot boot from hard drive. I boot from DVD and cannot find hard drive now
Info:
iMac, Mac OS X (10.7.3)
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Jun 21, 2012
My hard drive is so full, I cannot boot to desktop. It shows eyeglasses in top right corner. I don't have another mac to make it a hard drive. Is there another workaround?
Info:
iMac, Mac OS X (10.6.8)
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May 7, 2012
I had to power off my iMac by Pressing the power key and holding it several times over the last few weeks. The last time it wouldn't reboot - I'd just get an apple icon. When I tried a safe boot I'd get the icon and it would change to a no entry sign.Next I started up from the snow leopard installation disk with the intent of repairing the iMac disk. The installation disk worked but when I opened disk utility it only found the installation disk. It didn't find the iMac disk.
Info:iMac, Mac OS X (10.6.5)
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May 11, 2012
I installed a new hard drive. Now won't boot up I get a blinking world?
Info:
iMac, Mac OS X (10.7.3)
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Mar 6, 2012
Using my iMac in Target Disk Mode with Thunderbolt connection to Macbook Air.
Is there a way to get back to my iMac desktop without forcing it to restart? (holding down the power button)
Info:
iMac, iOS 5.0.1
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Sep 2, 2014
My 500gb iMac (purchased April 2010) is about at capacity. 350gb of space is taken up by home movies (.mov) in iMovie. I bought an external hard drive and have moved about 200gb over to that drive.
After transfer, I deleted the original Events off iMovie and emptied the trash. I checked in both iMovie and in Finder and no longer see those files present on the Mac.
I thought this was going smooth and everything worked perfectly, but….when i went to check how much storage space i created on the Mac, the amount of available space barely budged (i moved 200gb of data to the new drive and i created about 30gb of space on the Mac).
Are these "deleted" files hidden somewhere and I need to go delete from somewhere else? How do I make sure I get back the storage that i need?
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Feb 19, 2009
Odd stufff, I have a 500 gig Lacie ext HD that my user uses on her Vista machine...
I am setting up a replacement for the Vi$ta machine, which is a 24 inch imac.
I plugged in the ext HD and nothing happened after I powered on the ext HD.
I checked disk utility and it showed up but as a 2TB size ext HD...
I unplugged the Lacie and plugged it back in and all the info showed up correctly.
But ALL the buttons under "First Aid" are greyed out so I cant verify permissions, disk, or repair disk or permissions.
Information:
imac 24 inch
Mac OS X (10.5.8)
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Apr 15, 2012
I've just transferred my data to a new computer and now need to erase the hard drive on my old one.. I've tried Disk Utility, increased the security, and tried 'erase' but I keep getting an error message "couldn't unmount disk". I've gone into Partitions and tried deleting the HD there as well but I get the same message. I just want to get the computer securely wiped and would like to keep Lion as the operating system.
Info:
Macbook 2GB ram, Mac OS X (10.4.9)
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Apr 24, 2012
I have a 2TB Western Digital My Book Studio FW800 external that has 5 partitions, connected to my 2011 iMac. I had help doing the partitions and don't really remember the reasoning, but one is just for my SuperDuper! backup, one is Miscellaneous, one for movie clips off my camcorder, one for misc scanned photo's and one for my genealogy research. I back up using Time Machine to a Time Capsule and also to this WD hard drive with SuperDuper!
Recently I'm getting a pop up message that "Mac OS X can't repair the disk "Genealogy"'. And it needs to be reformatted. It's become a read only disk. When I look in Disk Utility it shows all the partitions as "Mac OS Extended (Journaled)" EXCEPT for the one in question. I also noticed that there are a lot of files with "date created" being the same date in 1969! These files may be letters I've written or photo's I added to that partition within the last few years.
I think I have to completely reformat the entire external hard drive to repair this, but I want to make sure. Because it's going to be a major hassle backing it all up to another external (having to get one first) and then figuring out how to make the files that have turned "read only" in that one partition, back to their original state! Does this sound right, that I have to reformat the entire external hard drive? And how do I get the read-only files back to their original state.
Info:
iMac, Mac OS X (10.7.3)
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Jun 27, 2014
I have a Seagate 1 TB Backup Plus Drive which was working perfectly fine until I plugged it into a USB hub. It detected it while in the hub and I was able to get files off of it, but when I ejected it from the hub and put it back into the USB slot on the computer it was not detected by finder. It shows up in the disk utility and I clicked verify and repair and it says:
Verify and Repair volume “Seagate Backup Plus Drive”
Checking file system
Volume repair complete.
Updating boot support partitions for the volume as required.
Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Is there any way to get this to work properly again? Or if not is there a way for me to recover my files on the external hard drive?
I have a Macbook PRO late 2011 running OS X Mavericks.
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Feb 22, 2010
I ran installer then went to disk utility and pushed disk repair. it ran and indicated in green that no repairs were necessary. i then went to startup disk and only the Diks and network startup showed up but no hard drive. i also open computer to make sure was not wet muddy due to leak in cooling system but all was dry
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Apr 24, 2010
I received my new i5 MBP today. After booting it once with the installed HDD to check if it's ok, I exchanged the hard disk for the one in my Late 2008 Macbook Pro. After doing this, my Late 2008 Macbook Pro boots fine with the (new) hard disk from the new i5 MBP, but the i5 MBP does not boot with my old hard disk.
To give you some details:
- I have installed 10.6.3 on the (old) hard disk that's not booting.
- The i5 MBP boots fine from the installation DVD
- Disk utility finds and can read my hard disk, no errors
- PRAM NVRAM reset did not help
- when booting in safe mode, I can see the system stop booting after or while loading Extensions.mkext
My guess is, it tries to boot and load the wrong Extensions for the new system (CPU? GPU?). I have no idea how to fix this.
Solution: Re-install Mac OS X from the installation DVD that came with the i5 on top of the existing (old) system. This takes around 45min. and leaves your data intact, but adds the Core i5/i7 support.
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Jan 3, 2011
I've created a Snow Leopard boot disk using this method link. I created it on a 16GB CF Disk. I've tried it twice. First time I formatted the disk as eXfat with 1 partition. Next time I used Mac OS Extended for a 7Gig partition and fat32 for the rest.
Upon boot I get the normal install stuff like I do with the DVD, but then no hard disk shows up. I thought it was because of the eXfat which is why I tried again. I looked into the system profiler and I can see my seagate hard disk, but under disk utility it doesn't exist. My Sata DVD drive shows up though. If I boot off of the DVD I can see and install to my hard disk.
I'm trying to make a USB Disk because I'm planning on getting a SSD and I will be removing the Dvd drive.
This is a Mid 2009 Macbook.
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Mar 9, 2012
I have just installed a new hard drive in my imac intel 20" (2006) and upgraded the memory and now the hard drive does not show up in the 'select destinations' folder of the install program. I can see the hard drive in the disk utilities window however it wont let me do anything.It is a seagate 1TB SATA II drive however it is displaying it as a 7.3 TB.I have tried to erase and partition and get the same error message each time, 'Input/Output error'.
I have tried starting the thing with the install disk which is Mac OS X (Tiger?) which came with the computer
Info:
iMac
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Jan 31, 2012
I've connected my new Iomega Minimax with a firewire cable directly to my iMAc but nothing appears on my desktop.
Info:
iMac
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Aug 4, 2007
i know that diskutil has alot of commands and im not sure how to use them, i would specifically want to know how to use eraseDisk properly. Or is there any other way to clean install tiger without using darwin? I know eraseDisk gives me a format to use but i never get it right for some reason. diskutil eraseDisk "Journaled HFS+" MacintoshHD bootable /dev/disk0 -- this works i got it right now but it gives me this error: could not unmount disk for zeroing
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Jan 7, 2010
My friend gave me his old Apple cube G4 + 15" Cinema display in like 1000 pieces. Its completely teared apart. I tried a lot, but it doesn't work. The original IDE cable wasn't included, so I bought one for 2 cents. It should work or not? Maybe the powersupply. I'm not sure. I don't believe actually that the hardware itself, like the motherboard is broken. When everything is into place and I connect the cube to the powersupply it boots immediately. I don't have to do anything. Harddrive spins and the superdrive makes some noise as well. This repeats itself every 5 seconds. The screen is connected and gets power through DVI, but no display. Both the cube and display have touch enabled buttons to switch it on, but they do not respond (I guess).. Motherboard gives 2 light. DS1 is green, DS2 is red.
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Sep 19, 2010
I just bought a new Mac Pro 6-core and an OWC 120Gb SSD drive. My question is putting the SSD on optical drive bay or Hard disk drive bay, is there any difference in performance? My understanding from my old PC is never to share the SATA cable with the optical drive as it will take the transfer speed of the optical drive, because they are running in the same "channel"?Is the 2 SATA cable in the optical drive bay 2 separate distinct ports/channel?
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May 6, 2012
So around 5 years ago i got the WD-160JB hard disk drive. I want to see all the things i did back then. I want to be able to connect this WD-160JB drive as a external hard drive to my mac.
What i am wondering is if you can somehow have a cable or something which links the USB from the MBP to the hard disk.
Info:
MacBook Pro, Mac OS X (10.7.3)
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Feb 11, 2012
I have read most things to do with the grey screen and the screen with the question mark, and it's obvious I have to put some sort of disks in, but there is already a disk stuck in the drive?
Info:
iMac
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Oct 1, 2010
is it possible to have boot camp and have the windows os stored on a usb/external hd?
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Apr 8, 2012
My MacBook is unable to boot. Whenever I try to boot, the spinning circle and the progress bar appears on the grey screen, but when the progress bar reaches about 40%, the computer shuts itself down. I started in Verbose Mode and tried AppleJack, and it said my harddisk needs to be repaired; but AppleJack is unable to do that. (Error Messages: "Invalid node structure" and "Incorrect number of thread records) I then tried to startup with both Recovery HD and Mac OS X Install DVD and ran the Disk Utility on both of the startups. At the First Aid tab, I selected my Hard Drive (not the Hitachi one, the Macintosh HD one) and clicked on Repair Disk. The error messages I got from Repair Disk were:Invalid volume file countInvalid node structureThe volume Macintosh HD could not be verified completely.
Error: Disk Utility can't repair this disk..disk, and restore your backed-up files. And, lastly, the following popup message appeared:Disk Utility stopped repairing "Macintosh HD"Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files. Not being sure how to back-up my files using Disk Utility, I plugged in an external HDD to my USB port and clicked on the Restore tab in the Disk Utility. As the Source, I selected Macintosh HD and as the Destination, I selected one of the partitions I created on my external HDD. However, when I clicked on Restore, I got the following error message:Restore FailureCould not restore - Input/output error I partitioned my external HDD by creating 2 partitions formatted in Mac OS Extended Journal - GPT. Now, what can I do to save my files (and my MacBook's HardDisk)?
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Dec 5, 2009
Mac G5 ppc OSX10.4.11
Starting up from any boot disk will give me a kernel panic forcing me to hard restart.
Background:
After many freezes I ran disk utility and I get:
Checking Catalog file.
Invalid index key
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS volume checked
Volume needs repair
So I use my wife's Imac startup disk to boot it in order to repair but I get the dreadfull death screen (I know how to press the C) I'm thinking maybe it's because her disk if for her Intel proc so I go and buy a copy of disk warrior 4, and same problem.
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Apr 2, 2009
Today is a bad day. My old 24" iMac has finally died it looks like and is experiencing the Gray Screen Of Death. I did have an external backup drive using time machine, so I was just going to restore it to my other iMac, but I can't find my boot disk.
I know how to do it with the boot disk, but is there any way to do it without one? I just want to restore the whole thing.
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