Mac Mini :: Won't Boot / Disk0s2: I/O Error

Oct 31, 2009

I have boot camp installed, and when I hold the Option key down at startup, I see the Windows Vista drive (but can't select it). After about a minute, the Mac OSX drive shows up. I can select the Mac drive, but then I get stuck at the grey screen again.

I tried starting up in Single User mode and at the command prompt, ran /sbin/fsck -fy but got a couple "disk0s2: I/O errors" followed by "Invalid node structure" and "The volume Macintosh HD could not be repaired." (see attached photo of exact message).


MacBook :: Doesn't Boot, Disk0s2 - I/O Error, Invalid Node Structure

May 10, 2010

I'm having big problem with my notebook.

It goes down after the gray start video.

Doing the fsck this is what comes out...

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Mac Mini Won't Boot

Mar 18, 2012

I have an older intel Mini running Lion. This morning my son told me it was displaying the screen that says you need to reboot.I told him to reboot it and let me know how it went. He came back and said it just brings up the reboot screen again.I rebooted it again, and again got the reboot message screen.I didn't start writing down the error messages because I assumed I would be able to get it fixed eventually.I rebooted with the option key pressed and selected the recovery disk. Again, I got the reboot screen.I then used my wife's macbook to create a USB recovery disk, booted the mini again, and selected the USB disk.I got the gray screen with the apple and the spinning stayed on that screen for over half an hour.At that point, I noted that the indicator light on the USB drive was showing no activity, so I shut the mini down and tried again to boot from the USB drive.This time I got the reboot screen again.At this point I wrote down the following error message:[code] At this point I wondered if I had corrupted something on the USB recovery disk by stopping it earlier.I rebooted with the option key pressed and selected the recovery partition on the HD, hoping to see if it provided the same error message.I got the gray screen with the spinning logo and it just hung there. After 20 minutes, I rebooted and just let it follow its normal boot procedure. Again, I got the gray screen with the spinning logo and it's been sitting there for the last half hour.

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OS X :: Unable To Startup - Disk0s2: I/O Error

Oct 26, 2010

I tried to on my mac this morning and just like usual, the "chime" when off and the gray screen with the apple logo came out together with the spinning gear.

However today, it took longer than usual on the spinning gear and my mac osx did not startup and my mac switched off automatically.

I then tried to boot my mac osx in safe mode(+verbose) and I got the following error:


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Mac Mini :: It Won't Boot To Lion OS

Feb 14, 2012

I have a Mac Mini with Lion OS.  When I power it on I can hear a chime and presented with a login screen.  After login, it looks like it is trying to boot from the internal hard drive but it seems to stuck with a white screen and animated circle (hour glass in windows). Is there a way to boot into a safe mode or re-install OS from DVD.  Note: I am using PC keyboard for my mac. My mini mac is 1.5 year old so it is out of warranty.   

Mac mini, Mac OS X (10.7.3)

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Mac Mini :: 4g Won't Boot... Flashing World?

Apr 15, 2009

so i downloaded the new 3.0 beta 3 software the CD wouldn't eject from the drive so I pressed down both mouse buttons while rebooting... tried to boot back up again and all i get is this?

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Mac Mini :: Server Won't Boot After Reinstall

Mar 22, 2012

I had to reinstall Snow Leopard Server on my Mac Mini Server. I did it via a firewire connection to my MBP. Everything runs fine when I boot in target disk mode from my MBP. Problem is when I disconnect the MBP and boot just mini it gives me an error message that says I need to restart the computer. I have the two 500gb drives on the mini configured in a raid array.

Mac mini, Mac OS X (10.6)

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Mac Mini :: Won't Boot After RAM Upgrade

May 21, 2012

I just recently bought 8gs of Corsair Mac RAM, links at the bottom.So they I changed the RAM sticks, not the first time I've upgraded RAM, just like I have every other time.But after switching the RAM the mac won't boot. Tried swapping back the old ones and still nothing.

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App Store :: Mac Mini Won't Let To Update Apps - Get An Error 13 Message

Jun 22, 2012

The app store on my Mac Mini (2.7GHZ I7 running 10.7.4) tells me I have 3 apps that need to be updated. Whenever I try to update them, I get an error message that reads " We could not complete your request. There was an error in the App Store. Please try again later. (13). I've gone online and saw that some people were fixing the problem by erasing some kind of hidden cookie. It seems to be somwhere in /library/Cookies file but I don't have a file in my library labeled "cookies". I also saw another post where they tried to delete it in terminal, but that had no effect for me.

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Mac Mini :: Late 09 Won't Boot - Screen Freezing

Aug 31, 2010

I have a macmini late 09 and I upgraded the RAM and HDD 2 weeks ago. Suddenly today the mini froze coming out of sleep. O left it for a few minutes but still no luck. Held down the power button and it rebooted. It goes to the apple screen and stays there. I checked the hardware and there are no problems. I then booted in from the older HDD and had no problems. I checked the permissions and repaired them.

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Mac Mini :: Won't Boot And Has Picture Of Switch On Screen

Sep 8, 2010

I just bought a Mac Mini and all technical help is closed right now. I am very frustrated as the one I bought yesterday had no display output. The system starts and gets to a screen that has what looks to be a switch that needs to be changed. I have looked at the entire box and can not see a switch that needs to be changed. I have taken a picture and have put it on here. I have googled it and can not find anything. My mouse and keyboard are both new wireless so I have nothing I can even use there. I am enclosing a picture of the screen. I also only have power and monitor plugged in.

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PowerPC :: G4 Mac Mini Won't Boot / Getting Blank Screen

Mar 12, 2008

I came home for lunch today, and found my Mac Mini G4 with the fan running, and a blank screen. It was obviously locked up. System has 10.5.2 with all of the latest updates. This is not my primary system, I have an MBP for that.

Here is what I did:

Force a power off/on, and I get the normal gray screen with the Apple, and spinning gear, but it never stops spinning.

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Mac Mini :: Won't Boot Or Eject CD Due To REFIt

Aug 20, 2009

Long story short, I wanted my Mini to dual boot Ubuntu 9.04 and OSX, and the guides I was finding said to use rEFIt. This worked fine until I allowed Ubuntu to install a bunch of updates, which must have done something to my partition table, as now I can no longer boot OSX or Ubuntu, and the CD I stuck in there won't eject either (so I can't get my OSX install disc to even load). Is there a rEFIt command from the shell I can run to eject the disc and try getting my OSX install disc in there?

Really stuck - When I cold boot, rEFIt gives me choices of OSX or Ubuntu, both just spin and die during boot. Tried holding space bar, c key, option key, left mouse, all on cold boot and upon selecting OSX option from rEFIt menu, no luck getting disc to eject. I followed the guide here: [URL] Did I do something wrong when I let Ubuntu 9.04 self-update? It REALLY seems to have screwed up my partition setup.

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Mac Mini :: Intel Won't Boot From USB Or DVD

Jul 31, 2010

I have a 2009 Mac Mini 2ghz that I was trying to install Leopard Server on. I have tried by booting from DVD, a second partition with the ISO burned to it, and even an external USB drive that has a full install of Leopard Server on it that successfully boots up a 2007 iMac. I have also tried to boot from 10.5 DVDs without any luck. The symptom is consistent - it attempts to boot and then reboots about 10 seconds later. This happens regardless of whether it is a physical DVD or an external USB drive. All DVD drives and USB drives are capable of booting the iMac.

I've reset PRAM, held down option keys to select boot drives, etc. I can't try target disk mode as I don't have a firewire cable handy. Booting into diagnostic mode detects no problems for both the short or long test. The machine is just out of warranty but did have a weird problem with network where it wouldn't recognize the network connected to a Netgear 716GS switch, no matter which port. 10 other computers connected to the switch without problem. I had brought it to the genius bar who couldn't determine any hardware problems and it worked with their network just fine.

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Software :: Mac Mini Won't Boot From Snow Leopard CD?

Nov 19, 2009

A few weeks ago I bought a slightly used Mac Mini on eBay. Everything was going well up until yesterday, when it froze up on me. I didn't think much of it, and tried starting it up again a few hours later, only to be greeted by the flashing question mark of death.

I did some reading online, and know that the flashing question mark basically means that there's either a problem with the OS installation or the hard drive itself. I borrowed a friend's Snow Leopard installation CD (mine didn't come with the CD) to try to boot from it, but it refuses to boot from the CD.

The only keyboard bootup control that does anything so far as I can tell is the alt key (using a windows keyboard), which results a long delay while booting, followed by a blank screen with a mouse cursor.

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Mac Mini :: Os X 10.7 Won't Boot After Permission Change To No Access To Everyone

May 1, 2012

I changed permissions for HD to no access for everyone, the Mini hang up, I had to force shutdown, ever since it is stuck on the apple and rotating bars, MacMini with OS X 10.7.2! I booted in asfe mode still stuck, repair permissions using the backup hd "10.7.2 after pressing shift key" did no fix!

Mac mini, Mac OS X (10.7.3)

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Mac Mini :: Won't Boot With VGA Monitor Connected

Jun 13, 2012

I have a new Mac Mini connected to an older VGA monitor using the Apple brand VGA adapter.  The mini is fully up to date and runs perfectly when booted.  However, if I reboot the mini with the VGA monitor connected, it fails to boot.  I just hear the faint chime sound every other second.  There is no output to the monitor and the only way I can get it to boot is to disconnect the monitor and then power cycle the mini.  I can reconnect the monitor just seconds after powering back on and it finishes booting properly. 

I've also tested with an HDMI connected monitor (without the VGA adapter) and it boots just fine and the display works properly.  

Mac mini, Mac OS X (10.7.4)

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Intel Mac :: Won't Boot After User Login Page - Error Occurred Installing Updates

Jun 11, 2012

I logged onto my iMac today and checked for any updates. I found updates for iPhoto, Thunderbolt, Airport and I think Safari. After it downloaded the updates and installed them, it wanted to reboot. Upon clicking ok, it went to a grey screen while initializing the updates, or something to that effect. Then it said an unknown error occurred and press ok to reboot. I presses ok but nothing happened, the box disappeared and the blank grey screen remained.

So I rebooted and the logon screen came up. I put my password in, which was accepted and the iMac moved on to blank grey screen with the darker grey Apple symbol in the middle and the the 'thinking' wheel doing its little circling thing just below that. It's sits there like that and doesn't move to the desktop screen. I've tried rebooting but it stalls at the same point. It's running the latest version of X. It didn't come with any disks and I don't have Time Machine.

iMac, Mac OS X (10.7.4), 2011 iMac 27" 4Gb Ram 1Tb

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OS X :: Alum Macbook And Mac Mini Won't Boot Off USB HDD

Aug 16, 2009

I've set up bootable external hard drives at least 100 times or more. Recently I purchased a Mac Mini and a Alum Macbook Late 2008, I had a WD 500GB portable passport that had two interfaces (USB/Firewire 800).

The portable drive was set up with four partitions, Leopard Installer, Leopard Server Installer, Intel Leopard OS, and Back Up. The drive had a partition scheme GUID which works best with Intel macs. Now here's the hickup, I managed to use this drive to install and troubleshoot Leopard on tons of different models. The weird thing is that when I tried to re-image my new Mac Mini with the drive via USB cable it would see the partition but fail to boot from it, but I was able to boot from the Intel Leopard OS partition with no issues.

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Mac Mini :: Ram Clip Broke During Upgrade And Now Won't Boot?

May 19, 2012

I was upgrading rame in my 2011 mac mini and removed the first module without incident but upon removing the second module the clip on the left broke and upon trying to reseat the 2 new ram modules so I could at least boot my mac the lower one is loose (which I expected but upon inserting the top one the clips did not grip it and not they are both stuck loosely in the mac mini which will not boot. 

After having installed rame in a PC laptop and my mac ro I have had 2 successful ram upgrades so was not impressed to find that the ram upgrade process in the mini has some really bad clips. 

So now what do I do and to complicate things even further there is some stuff on the mini I need.

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Mac Mini :: 1.66 Won't Boot With Combo Keys Using PC Type USB Keyboard

May 26, 2009

I have Mac Mini 1.66 Intel 2006 OS X 10.4.11 with CD-R and DVD Player that won't boot properly into single user mode using a IBM PC keyboard. I have tried the alt-s, windows key-s and control-s key combinations. from the mac keyboard hints sheet located on this web site.

I have also tried to boot with key combinations from the mac mini manual with no success. I have also tried to simply insert the install CD/DVD for MAC OS X 10.4 that came with the computer and start the computer with various key combinations and the cd/dvd drive will not boot.

What do I need to do to be able to accomplish these tasks with the PC/ Windows keyboard.

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Mac Mini :: Intel Won't Boot - Grey Screen With Spinning Little Icon

Jul 18, 2009

I have a Mac Mini that my sister gave me because she said it stopped working. She said she wanted me to get all her photos off of it. Its a Model A1176 1.66/2X512/80/COMBO/AP/BT I tried playing with it and it powers up, shows the Apple on a grey screen with a spinning little icon.. It does that for about 30 sec and then turns off. I opened it up, took the hard drive out, put it into an external USB case and hooked it up to my Windows PC and loaded MacDrive 8 software. Got the drive to be recognized on the PC and backed up all her photos.

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Mac Mini :: Won't Boot After Accidental Loss Of Power During Firmware Upgrade

Feb 19, 2012

i accidentally hit the power switch on the wall during an upgrade (might even have been a firmware upgrade, I didn't really look at what was going on).  Anyway, now it hangs on the silver Apple logo screen with a spinny wheel on reboot.  It's only 3 months old, it's the $599 model. 

What to do?  I see that you can download firmware restoration disks but they appear to be limited to earlier versions of the Mac mini.

Mac mini, Mac OS X (10.7), I think the OS is OSX 10.7...

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PowerPC :: Getting Error - G4 Won't Boot

Feb 12, 2010

I have a powerbook g4 that won't boot...I initially would get a kernel panic error after the apple loading screen, so i would reset and just kept getting back to the error. I searched through some forums and tried resetting the pram, now after the loading screen the screen just goes black (computer is on, just plain black screen). In looking through forums I read that the kernel panic is usually a hardware error; I have a new macbook that i got right before this powerbook stopped loading (at least got everything copied into the new one ) and my husband had been using the pb for the last few weeks, mostly just watching tv online...nothing strange. he got a few kernel panics the last couple days, but he would turn off and i'd open it just fine in the morning. he mentioned the screen had started flickering a few times...and now on the gray apple loading screen - the only actual image that the computer loads - the little apple also flashes between it's regular gray color and like stripy/blocky blue squares...could it be a monitor problem?? I found a bunch of "powerbook not booting" forums, but none mentioned the flickering screen...It'd be nice to know what's going on and fix it, if possible.

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Mac Mini :: Won't Boot From Snow Leopard CD / Blank Screen With A Mouse Cursor

Nov 18, 2009

I did some reading online, and know that the flashing question mark basically means that there's either a problem with the OS installation or the hard drive itself. I borrowed a friend's Snow Leopard installation CD (mine didn't come with the CD) to try to boot from it, but it refuses to boot from the CD.

The only keyboard bootup control that does anything so far as I can tell is the alt key (using a windows keyboard), which results a long delay while booting, followed by a blank screen with a mouse cursor. Everything else just ends up with the flashing question mark. If I try to hold C to boot from the CD, it sits there for 3-4 minutes with the occassional CD whirring sound, then ejects the CD and goes to the flashing question mark.

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OS X :: IMac 27" Won't Boot Into Install Disk - Error

Jun 18, 2010

i have read various threads about this but can't find a cure, here is what's happening:

1) Was running disk utility and said i have a corrupted disk
2) OSX runs fine but i can't reboot into startup disk in order to repair disk
3) Can only boot into OSX now by holding down Option key and selecting OSX
4) Can't use this method to boot into install disk or external drive.

Remedies, I have done the following:

1) Repaired permissions
2) SMC reset
3) PRAM reset
4) Wont allow me to safe boot
5) Won't allow me to boot from install disk
6) Won't install SL disk to try and repair install

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PowerPC :: IMac G5 Won't Boot - Logic Board Error Detected

May 17, 2007

I have an imac G5 20" that is approximately two years old. About 2-3 weeks ago it started acting a bit would lock up on std apps (firefox), it would always lock up after being revived from sleeping etc. I ran the hardware test and everything checked out. Then a few days ago it wouldn't boot. I get the chime, I hear the drive spinning, then the fans kick into high gear and I get a screen with a folder in the middle with a "question mark icon" and a "finder icon" displaying alternatively inside the folder. So I booted up the hardware test dvd and the test failed 27 seconds in with the following error code:

2GMC/2/15: built-in
Logic Board Error Detected

Are there any other steps I should be taking before taking in for service?

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OS X :: Mac Mini Won't Boot / Getting Gray Screen With The Gray Apple Logo

May 8, 2007

Unfortunately I bumped the switch on the power strip that my Mac Mini (1.42ghz G4, OS X 10.3) is plugged into while it was running. Now it won't boot up. All I get is the gray screen with the gray apple logo and the spinning wheel but no OSX.

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MacBook Pro :: Stuck On Grey Screen With Apple Logo "disk0s2 I/O Error 2009"

Jan 10, 2011

I have a Macbook Pro 13 from the summer of 2009. After Christmas I decided to upgrade my hard drive and memory. This is what I got. [URL] For about a week everything seemed to work perfectly. I then began to have problems almost every day (finder crashing, etc). I reinstalled OSX probably 5 times using my previous account until finally did a clean wipe and reinstalled OSX again. It now seems to be working for the most part, but booting takes about two minutes. It gets stuck on the grey screen with the Apple logo with the turning gear for a couple of minutes before it boots. Normally it wouldn't bother me too much, but after the problems I was having before, I really wanted to make sure that there was no problem with my new hard drive or memory. After doing the usual suggestions for slow boot time (resetting PRAM, disconnecting external devices, repairing disk permissions, etc.) nothing changed. I booted into verbose mode and it seems to hang up for awhile before listing

disk0s2 i/o error

It does this twice before booting, hanging up for about a minute before giving the error. I am not sure if i should return it under warranty because I am not sure its broken. Like I said, it seems perfectly fine right now with the exception of the boot time. Using the Apple Hardware Check, even the extended check, didn't give any errors. The SMART status for the hard drive is verified. Is this clearly a hard drive issue, or could it be something else? Has anyone else had a similar problem?

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Windows On Mac :: I7 MBP Won't Load Boot Drivers After Boot Camp

Jul 6, 2010

Have the new 15" MBP with i7 Processor. I had another MBP with a 7200RPM drive and installed drive in the new i7 Mac. Computer was working fine until I installed Windows via Boot Camp. I can't boot to the Mac Partition any more, the partition is there but when you try to boot to it you just see the Apple logo and NO circle. I cannot boot to the install CDs or a bootable external drive. I target disk mode the computer and used another computer to boot using the drive in the i7 unit and it's fine and I can see all the information. I tried booting the i7 into single user mode and saw the following message:

efiboot loaded from device: Acpi(PNP0A03,0)/Pci(1|1)/Ata(Primary,Master)/HD(Part 2,Sig********-****-****-****-************)
boot file path: SystemLibraryCoreServicesoot.efi
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Power Mac :: G5 Won't Boot - Making It Boot

Mar 26, 2012

last night I was using my computer just chatting with people, then all of the sudden it shuts off. Now it won't boot past the apple grey loading screen, and the fans slowly rev up till they are full boar, and I have to shut it off for them to stop.  I've reset the PRAM, the SMU/PMU, tried holding alt and selecting my drive to boot to. None of these did anything, and didn't help at all.  

I've heard it's a processer or logic board failure, or a HD failure, or something else. I'm ready to buy a new computer, I'm actually kind of sick of this one, I just want to know if I can fix it or not. I will probably take it to the apple store just to make sure, but maybe I can get an answer on here to know how to fix it or just to know that it's dead. 


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Mac Mini :: New Mini Won't Recognize An External Drive (LaCie 1TB  Porsche Design?

Feb 6, 2012

Have a new Mac Mini, using an external drive but I can't get it to show up in finder. It's a Lacie 1TB Porsche design HDD, using a USB connection directly into the mini. I tried it at first by connecting to an open usb on my cinema good. Also no good when connected directly into the mini.

Mac mini, Mac OS X (10.7.3)

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Intel Mac :: 'Initialization Error -43' And The Player Won't Launch

Jun 24, 2012

Recently whenever I try to launch the DVD player I get a message that says 'Initialization Error -43' and the player won't launch.  This is a new problem - I haven't had problems with DVD's before.  I'm running OS 10.5.8. 

iMac (20-inch Early 2008), Mac OS X (10.5.8)

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Applications :: Won't Fix TubeTV Error And Error WTF

Jul 14, 2009

i downloaded TubeTV after being told it was a good one... it worked fine then now all it does is download the vid, into .flv format and wont convert it, all it says is "error"

if you know a good converter, that will convert these files to files able to be viewed by ipod's and iphone.

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Mac Pro :: Mac Pro Won't Boot / Kernel Panic At Boot Graphics Card Failure?

Oct 2, 2009

Yesterday my screen (30" Apple Cinema) started showing symptoms of graphics card failure, jagged lines across the screen. I rebooted my Mac Pro and it was gone. Then it happened again an hour later, this time the machine didn't boot, I get the Apple logo, and then it hangs up and the screen is shifted to left (I get apple logo on left side of the monitor instead of the middle) and jagged lines all over.

So the first thing I tested was using Target Disk Mode, it works. I can access my Mac Pro's internal HD's by TDM from my MacBook Pro. Then I tested single user mode, it does boot, I can't read what's written since the screen is shifted to left, but if I type (without seeing) reboot and hit enter, it reboots. So I assume the single user mode is working.

What else can I try to 100% make sure it's my graphics card that failed and everything else is ok with Mac Pro? I already ordered a graphics card replacement but I wouldn't like to be surprised if the Mac Pro still doesn't boot when the card arrives.

P.S. It won't boot from Apple Startup DVD either. Same thing happens, gray logo then kernel panic with jagged lines all across the shifted screen.

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