OS X :: Disk=0s2: I/O Error - Restart Computer - Hold Down On Bootup
Jan 3, 2010
I have got the message "You need to restart your computer. Hold down..." in my MBA. Having read what have been posted before about this problem, I do not find a proper solution for it. So I have just copied the message I get from the screen after a safe boot op. It says
disk=0s2: I/O error.
0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 57424] [LBlkNum 900] [FSLogMsgID 11596090533] [FSLogMsgOrder First]...............................
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Apr 14, 2009
Whenever I open my mac mini it comes up with the same message "You need to restart your computer hold down the power button or press restart" in four different languages.
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Mar 21, 2012
I just installed 2 4 gb of ram in my unibody mac book pro 13"
I now get a error saying to push and hold the power button and then restart. The message keeps coming back up every time any thoughts ?
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Jun 3, 2009
Got a tricky one here: powerbook G4, 1.25ghz, 1GB RAM (2x512), 80gb HD, APX, 15" LCD, serviceable battery, SuperDrive, OS: 10.4.11. It was brought to me with a boot problem: Computer turns on, gives the start up sound, backlight comes on, apple logo shows, spinner spins... then you get the dimmed screen, large option icon and "You must hold the power button and restart your computer": a kernel panic. I've seen this a few times before and the last time, I fixed it with a new hard drive and the removal of RAM from a bad ram slot.
What I did was:
1) Replaced existing 80GB HD with a backup 30GB drive. Then booted with a Tiger CD (the computer won't start with my disk warrior cd, nor with a tiger DVD). I was able to install Tiger and restart the computer. But the airport card doesn't show up. I tried a known good airport extreme card and this too has not shown up.
2) I hooked up the 80GB drive to my PC via MacDisk and checked it. Sure 'nuf it had loads of problems. MacDisk went through and fixed it (I'm not sure what the problems were as I'm new to MacDisk and don't know what it's looking for and fixing when it does).
3) With the computer running the 30GB known good HD, I started having the same kernel panics so I removed the first RAM chip (512MB) and tried to reset the PRAM.... here's where it went wonky. (I know, only change one thing at a time...)
4) As I said I tried to reset the PRAM (Option, Command, P, R, at start up). While I can get the computer to not boot, it won't restart. I don't know if this is just unique to this machine. Next I tried to reset the NVRAM and again got nothing. The screen wouldn't come on at all. After about three or four resets, the computer did start in Open Firmware mode. I reset the NVRAM from there and restarted (reset-nvram, reset-all). Still nothing on restart.
5) After trying to start it 15 times like this, I swapped the bottom RAM card to the top slot and removed the airport card (again, I'm stupidly trying to change two things at a time). BAM, computer boots... I put back in the 80GB drive that's been "fixed" by MacDrive and BAM, that boots fine too.
So then I put back in the airport card and it will boot, but won't recognize the airport card. I've re-seated it about a dozen times and have used terminal cleaner on the card and on the socket for the ribbon cable from the card slot to the logic board. As it sits, I can't get the airport card (either of the two) to show up at all. I did realize that the open firmware did reference a problem, but I forget the code now and when I looked it up, the references were to a failure of the airport card, but there were also more general references, so I can't be sure.
I'm thinking now that it's the airport card controller on the logic board, the bottom RAM slot and a corruption of the hard drive. Yes, there was a history of moisture into the device and I think a drop in it's past too. I'm the Mac repair technician for the people at the local bike shop, so I get to trade my repair work for their bike repair work. The problem is that they ride their laptops like their bikes, hard and greasy. I'm really wondering about ways to get the airport card back up and running. Or, baring that, a good card-based wireless adapter that I can slide in.
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May 23, 2010
My Macbook pro is not booting properly. When I start it up, it goes through the normal process and gets to a point where a screen comes up telling me: "You need to restart your computer. Hold down the Power button for several seconds or press restart now" This happens every time. I tried to start in safe mode and holding down the option key and selecting the mac partition. Neither would work.
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Nov 28, 2010
So ever since about 3-4 months ago, I'll get an error message on my Mac stating that I need to restart my computer. I lose all control and my only option really is to hold the power button down and restart it. I then Googled the issue and found this out. [URL]. No now my question is, do I do a clean install of my OS? Can Can I reinstall and then use time machine to restore my computer? I'm guessing that would give me the same problem as before. Any advice would be great! By the way.. I have a 2010 MacBook Pro i5 so its still really new. This problem happens maybe once every 2 months depending on how hard I'm using it.
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Oct 19, 2009
this is my first post here and i hate that it has to be on these terms. however, my mac mini today just out of no where popped up with an error message stating "you must restart your computer...." and so on in several different languages. im not a total noob...so this shouldnt be racking my brain like this. ive read every website and forum relating to this subject, and nothing anyone has to say seems to help. i understand this is a kernel error this message pops up quicker sometimes than others. sometimes it pops up at the blue screen just before my computer prompts me for my password. sometimes, it lets me log into my computer, then the error message will appear. and sometimes it wont even make it to the blue screen, it just gives me a gray screen then the error message. ive tried booting in safe mode and it lets me log in, loads my icons and my desktop, then as soon as i click a single click on the mouse, the message pops back up. ive read some people saying to try reinstalling osx, or to try loading the install disc and repairing some things. i cant get the computer to even seem to boot the disc when i put it in. i am trying to avoid reinstalling osx but if i have to reinstall osx, then i will. i did NOT install anything, upgrade anything, change any system files, change any hardware or anything. i was just downloading a torrent, left my house for a bit, came back and the error message was there. im a graphic designer with work that needs to be done...i can't have a broken computer. does anyone have any clue what to do?
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Apr 29, 2009
I have just shipped my Mac Mini to its new home and I've had reports that the panic error is appearing on boot up: "You need to restart your computer. Hold down the power button for several seconds or press the Restart Button." This screen appears on the blue window just after the grey apple screen has disappeared and does not get as far as the desktop at the same point each time. We have tried to reinstall mac OS from the original install disk but holding the "C" Key or the "Option" Key down on restart doesn't boot from disc. Is there a way you can view the Kernel Panic log before you boot into Mac OS so we can try and pin point the source of this problem. I'm wondering if this could have been the result of the shipping that has caused some hardware to come loose.
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Mar 19, 2012
My IMAC keeps prompting me to restart after the screen turns grey. Essentially, after a few hours of use, the screen turns dark grey, filling in from the top to the bottom slowly. Once the screen has the dark grey hue, directions pop up in the middle of the screen for me to restart the computer. Once I restart it, the computer automatically generates an error box to report to apple. However, when I click the box to submit to apple, even if when the computer is connected and running well, it will not allow me to report it.
Info:
iMac, Mac OS X (10.5.8)
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Feb 20, 2009
I went on vacation to Florida this week, I come back, start up my iMac, plug my headphones in, only to hear audio to come out of my iMac's speakers. I called apple, and I did the whole restart and hold down command, option, P and R and still nothing, I have apple care and he said I should talk to small dog. I called Small Dog gave them a description and said they would have to send it to apple because my logic board might have issues. My question is this
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Jan 29, 2010
Sometime when I stop using my MBP for a minute or so, the screen goes black and won't wake up. I can see that the lights are on the keyboard and it's running but won't wake up. I will have to hold the power button down and then restart. Does any one know how to fix this? It's starting to do it more and more ofter.
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Feb 18, 2009
I have an old Performa 6400/180, which has been working fine up until a few days ago. Then one day I booted the machine up and was greeted by the following "bomb" message:
"Sorry, a system error occurred.
bus error To temporarily turn off extensions, restart and hold down the shift key."
I have followed these instructions, but it only gets to the "Starting Up. . ." screen and hangs while searching for extensions.
I can't find the documentation that has the OS version, but the machine was bought with whatever was current in early 1996 and has not been updated since.
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Jan 17, 2010
When I drag some MP3s into iTunes it will sometimes at first say "importing" at the top as if it's working, but then show this error. After it happens iTunes won't import anything at all till i restart my computer.
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Apr 7, 2007
I have a 1.83 MBP, with 1.5 gigs of RAM (stock 512 + additional crucial 1gb) 80 gig HD. Pretty standard.My issue is that once in a while when I restart my machine, bootup is really slow and then I get a weird screen glitch. Often I won't get a full re-boot but will get a half appearing dock and no desktop icons. Sometimes it will have lots of grainy lines across it. Sometimes I will get the beach ball for extended times and it will just freeze there. Basically I keep restarting it, and eventually it goes away and boots up normal.
The thing is I can't really replicate the problem. It just happens at random. Sometimes it happens after I have a system crash, and I need to restart, and sometimes it happens just after a system update restart.Like I said, it doesn't happen that often, but when it does it kind of freaks me out. I've had the logic board replaced in the past to eliminate the "whinning" (which, thankfully is now gone) and I wonder if this is another logic board problem. Other than that the computer has been great. And upon the complementary Applecare expiring pretty soon, I wonder if I should take it in for a repair or just not worry about it. It's kind of hard to take it in if I can't really show them the problem.
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Feb 3, 2012
I have been getting an error message each time I connect an external HD to my MBP; "The disk you inserted was not readable by this computer." which allows for 'Ignore' or 'Eject', I typically ignore and all appears to run fine, but still there is something obviously off a bit, incidentally the HD is a WD 640Gb that has my iTunes library?
Info:
MacBook Pro, Mac OS X (10.7.3)
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Apr 10, 2012
I recently had a friend fill my hard drive with movies and DVD's. Until this morning I had no problem with viewing the files on my computer and through my tv, other than the fact that I had to download VLC player on my computer as the files were all avi. Last night I noticed that two of the individual files either wouldn't load, or dropped out half way through. I fixed these files by repairing them individually, which solved the problem. This afternoon, my files were working perfectly, with no problems at all.
Tonight, I have gone to plug in my hard drive, and it won't recognise it at all, other than to tell me that the disk I inserted was not readable by the computer. This afternoon my Mac suddenly needed to restart, the grey screen came over and I had no option but to restart my computer by pressing and holding the power button. This has happened before, but hasn't seemed to affect anything?
I've tried restarting the computer and changing the hard drive into a different USB port but neither have made any difference. I've also tried to repair disk in Disk Utility, which hasn't worked either. Is there a way to fix this? Or at least get the files off the hard drive onto another hard drive? The hard drive won't show in Finder so I don't know how to back up the files as Disk Utility suggests I do. The hard drive is a HP SimpleSave, about 2 years old. Never had any problem with it before!
Info:
Mac OS X (10.6.8)
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Mar 8, 2012
I want to know how to find out what is the max amount of ram my computer can actually take advantage of, rather than tell you my model and you tell me what is the max because I know it varies according to the model of the Computer
here is my model: Macbook(13-inch, Mid 2010 [unibody]) basically the latest version of the white macbook.
Info:
Mac OS X (10.7.3)
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Aug 22, 2014
So I'm having issues with the computer not waking up in the morning. I guess it goes into a deep sleep of some sort and I have to hold the power button twice to turn it on, and get greeted with a computer experienced a problem message on login.
The most recent log in the system diagnostics is titled:
aosnotifyd,diskarbitrationd_2014-08-21-184310_MacBook-Pro.shutdownStall
And the brief details are:
ate/Time: 2014-08-20 22:02:42 -0700
OS Version: 10.9.4 (Build 13E28)
Architecture: x86_64
Report Version: 18
Command: No Target
[code]....
Info:
MacBook Pro (Retina, 15-inch, Mid 2014), OS X Mavericks (10.9.4)
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Apr 16, 2010
Took my Powerbook to the Apple store because, if can you believe this, it shut me out with a mysterious log-in request, which I had not engaged, plus the thing had begun slowing down... I asked if they could override the mysterious password issue and do a backup/erase/reinstall. They told me they could not and my hard drive was failing so I bought a new drive, installed it and am now experiencing a "freezing" issue everytime I try to boot-up from my OS X installation disc. Actually, the "freezing" was occurring with the old hard drive as well, but only during a reboot through the disc.
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Sep 3, 2007
VLC (because Front Row is just too slow for me), and I want to go to sleep. I hold the play button on my Apple Remote to sleep my computer, but from within VLC it does nothing.Is there any way to get the 'hold play on the apple remote to sleep your computer' function to work from within VLC?
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May 2, 2010
I have a late 2008 uMBP 15 inch and in safari, regardless of using the integrated graphics card or the higher end card, when I press apple t for a new tab the computer hangs for at least 10 seconds then once it finally loads the top sites page it appears all scrambles for a second, then it works normally.
My second problem is that my hinge is very loose. I can't hold the laptop at 45 degree angle without the screen falling down and closing. Will apple fix this?
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Jul 5, 2012
I got this message this afternoon "The disk you inserted was not readable by this computer" with the options to either "Ignore" or Eject" This is in reference to my External Hard Drive "Buffalo" 1TB. I just got my Mac 27inch this week and when i got it i hooked up this hard drive to it, historically used on my old windows machine, but was still FAT32 formatted. I was able to upload all my pics to Aperture and music to iTunes. Was able to surf the data no problem. This afternoon i noticed that it was no longer visible in the "Finder" and afre rebooting several times,got this message "The disk you inserted was not readable by this computer" Neither the mac nor the HD was moved since yesterday, early this am when it worked.
Some info:I had used this external storage unit for more then a year.I sold my PC today so cant test if the hard drive still works on that. I have the latest 27 inch mac (2.7GHz)Storage is connected to a power source ( I tried both USB and FireWire, both yield the same message)
Info:
iMac, Mac OS X (10.7.4)
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Sep 24, 2009
I've got a Powermac G5 desktop. I recently purchased a used keyboard for it off of Ebay. The computer was working fine with just a mouse. Shortly after the keyboard was plugged in, I got a kernel panic, and had to restart. I restarted, and immediately got a message saying "you need to restart your computer", and followed by another kernel panic.
Now, I get a kernel panic and "restart your computer" message, even if the keyboard is unplugged.
I was planning to do a clean install of OS X anyway, and figured that since the computer is completely useless at this point, now would be a pretty good time to go ahead and do it. So I tried to boot from the install CD by inserting the CD and holding down the 'C' key. No result -- it doesn't show me the "boot menu", and instead proceeds as usual, to it's "Restart your computer" message and subsequent kernel panic.
So I then tried rebooting and holding down the "Option" key, and managed to get to the boot menu. I selected "Mac OS X Install Disc 1" and clicked the "--->" button ... kernel panic again.
I'm at a complete loss for what to do next. Any help with this would be much appreciated. All I want to do is reinstall OS X.
How can there be a kernel panic from the boot CD? Apple didn't make it where it tries to use the kernel from disk during install did they?
I'm coming from a Linux background, and am not at all familiar with OS X, so forgive me if I've left information out that I should have included. Please let me know if this is the case, and I'll do what I can to provide it for you.
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Jun 3, 2012
I am running a MacBook Pro, Mac OS X Lion 10.7.4 Recently, I had formatted by Western Digital 2TB harddrive into two partitions. One in Mac OS Extended Journaled) format, for backing up files via Time Machine. And the other in MS-DOS (FAT) format, for my normal harddrive use between Mac and Windows. There were no problems, until I had ejected it and replugged it into my MacBook a few days later. It came up with this error: "The disk you inserted was not readable by this computer". The harddrive doesn't show up on the Finder sidebar.
I tried opening it via Disk Utility, and gave me the following: Disk Description : WD Ext HDD 1021 Media Total Capacity : 2 TB (2,000,396,746,752 Bytes)Connection Bus : USBWrite Status : Read/WriteConnection Type : ExternalS.M.A.R.T. Status : Not SupportedUSB Serial Number : 5743415A4137383538373835 Partition Map Scheme : Unformatted In the Disk Utility:
It doesn't give me the option to Verify or Repair the disk. I tried erasing everything and reformatting it in Mac OS Extended (Journaled) format. It stalls on "Unmounting disk" for a few minutes then proceeds with another error: "Disk Erase failed with the error: Unable to write the last block of device" - and sometimes the harddrive would just randomly eject during this process. It wouldn't let me partition the drive to any parts (not even back to one). It also wouldn't let me restore I booted My MacBook into Windows 7 Home Premium and plugged in the harddrive. Again, Windows couldn't install the driver properly and thus, it didn't show up on "My Computer".
I'm assuming the hard-drive is corrupted. The hard-drive was working fine before all the formatting and partitioning - in a Windows format, I think. What might be the problem and what can I do to format and/or recover files from the corrupt hard-drive?
Info:
MacBook Pro, Mac OS X (10.7.4)
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Jul 2, 2012
Why do I keep getting "the disk you inserted was not readable by this computer" caution message when I don't have a disk inserted???
Info:
iMac (21.5-inch Mid 2011), Mac OS X (10.7.3), Imma new mac owner.
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May 12, 2012
I was using garage band when the screen popped up saying that i need to restart my computer. i tried holding down the power button but the screen is frozen. the computer is making a quiet clicking sound. if i close the laptop the light stays on and the sound persists.
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Jun 16, 2012
So I just picked up one of the new retina macbook pro's as I needed an upgrade badly. It's had no problems until today.Stuff started to get laggy like something was hogging the cpu/ram and then i just turned off and went to the grey "you must restart because of an error screen". I ran an apple hardware test and everything came out fine and I reset the SMC and PRAM. Should I just wait it out and just return it if something else goes wrong?
Info:
MacBook Pro (Retina, Mid 2012), Mac OS X (10.7.4)
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Oct 9, 2010
I had windows vista installed but suddenly the audio decided to become faulty, after spending a day trying to fix it i realized I have a windows 7 install disc so i might as well just replace vista with windows 7. I didnt take care of vista or ever register it so it became quite a task to upgrade so i just deleted the partition and went to create a new one and just do a full install of windows 7.
I made the partition but the wrong format, so i removed it through boot camp assistant and created another, except now it keeps giving me the "back up the disk and use disk utility to format it as a single Mac OS Extended (Journaled) volume. Restore your information to the disk and try using boot camp assistant again" Now, I'd love to do this, except I have no idea what I'm doing and WHY this error has occured. After becoming frustrated I switched from my imac to my macbook pro and received the same error when trying to create a partition. So any help on exactly what I need to do would be a HUGE help. I only use windows for music production (I know, seems backwards, but I use Sony Acid and FL Studio so I'm stuck with Windows)
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Nov 25, 2010
Every time I try to export a movie in iMovie or burn a disk in iDVD an error message pops up and says that my startup disk is full. So I bought an external hard drive and backed up my mac using Time Machine. Now I want to delete everything off my mac's internal Hard Drive and use my external hard drive so I can empty my disk. Does this make sense? If so will you please tell me how to do so.
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Aug 20, 2009
A friend of mine somehow ruined his iMac's operating system (tiger) and tried to fresh format his hardrive. He told me that every time he would attempt to install, it would say "install failed" and he would have to restart. I couldn't imagine what he was doing wrong, so I attempted to install tiger on his iMac. OSX failed to install with "erase and install" so I ran disk utility and attempted repair with "failure to unmount".
I also tried erase via disk utility using various formating (journaled etc.). How would I be able to install tiger without error? I am not exactly sure why the installer fails, I am assuming it is something on the hard drive that is preventing install. I don't think it's the disk because the installation disk check proceeded and gave no errors.
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