Software :: IMac Shuts Down At Start Up

Feb 1, 2009

This has been a great computer - bought new in 2004. Recently started to click "off" as it was just powering up. I thought there was a bug - so did a clean and install for OS X - but still does it. The only way to start computer is to hold the Options & Alt key and P and R key at start up until I hear 6 dinging noises of start up (why six is the magic number I don't know. But it is the only combo that works!). Once it is up and running no problems.

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OS X :: IMac Shuts Off Durning Start Up After The Apple Logo?

Nov 12, 2009

when i start my imac it shows the apple logo, then the circle starts spinning and after a couple minutes it just shuts off. BTW i have windows on it as well so when i hold option it lets me open windows but not os

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MacBook :: Shuts Down Right After Start Up?

Mar 15, 2012

my macbook shuts off after initial start up

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MacBook Air :: It Shuts Off And Cannot Start

Jul 5, 2012

I have a late 2010 MacBook Air.Unfortunately, I'm in a country without an Apple store or any kind of official Apple support (no phone number to call).

2 days ago, I plugged in a little USB modem device (wireless is rare here) and my laptop shut down suddenly. It refused to restart at all until I did an SMC reset and then it was working fine (including with the USB modem plugged in).

However, the next day, the same shut-down occurred (when I plugged in the modem again) and now SMC reset is not doing anything. I've held down the start button for a very long time and there aren't any signs of life. The light on the charger shows that it is charging when I plug it in.

Info:MacBook Air (13-inch Late 2010)

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Power Mac G5 :: Shuts-down A Few Seconds After Start-up?

Nov 21, 2007

I've got a strange issue with my PowerMac dual 1.8GhZ and I can't figure out where it's coming from.Last Saturday I experienced a Kernell Panic while using Safari and the Dictionary (MacOS 10.5.1).Since then, whenever I try to start my computer, it shuts itself down while the grey screen with the Apple logo is on screen. However, this isn't always the case:I can use my computer 'normally' if I press the option key at start-up and manually choose my startup disk.

I can boot from a Panther or Tiger installation disk, but not Leopard.If I try the hardware test the computer shuts itself down in the middle of the test.TechTool works and didn't find any issues with my computer. Nor did Disk Utility.I tried to erase both my internal hard-drives and do a clean install of Tiger, but the problem is still there (I have to press option at startup).I tried to reset the PRAM and Cuda/PMA. Doesn't resolve the issue.When I tick 'Restart automatically after power failure' in Energy Saver my Mac will indeed restart, meaning it thinks there was a power failure.Any idea what it might be? And why it only happens in certain situations?Do you think it's a hardware or a software issue?

Information:
PowerMac G5 dual 1.8GhZ
Mac OS X (10.5.1)

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Mac Pro :: Shuts Down Instead Of Sleeping Then Needs To Be Unplugged To Start Up

Jan 25, 2010

This is a new problem, started immediately after moving the computer gently a foot to the left...

When computer goes to sleep it shuts down.

Then when I press the power button I hear the mechanical click but it doesn't power back up.

Then if I unplug and re-plug it'll start back up. Happens every time like this.

I've, reseated the RAM chips, repaired permissions and reset SDC (SMC? whatever you call it when you hold the power button in for five seconds after unplugging).

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OS X Server :: Computer Shuts Down - Right After Start Up

Feb 25, 2008

My comp. has worked perfectly, Then I installed some updates, Itunes i think? And the comp. Shut down, and when it restarts it works for a min or two, then freezes, and i get the beach ball, that just spins around and around forever.

if I don't try to open anything, or do anything when i restart it, it will just shut down, and restart, then when it comes to the Grey screen with the apple and the little circle below it, the circle looks all pixilated, and just freezes

that is the version its on (Taken two days ago, and sent to a buddy for other reasons completely)

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Desktops :: Mac Attempts To Start Up And Automatically Shuts Down?

Aug 13, 2009

My Mac attempts to start up and automatically shuts down on it's own. It continues to start and stop for several minutes and finally boots up. Once it's up it works OK. I've had it in to the Mac store and they tell me it's probably the power supply, but after leaving it on all weekend it seemed to work OK so they didn't do anything. After I brought it home it is still acting in the same way. It's only on trying to start up that it cycles through the start - stop action. Once I turn it off it's the same problem on trying to start again. Does this sound like a power supply problem?

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MacBook Pro :: WILL NOT START. Powers On, Grey Apple Screen Loads Then Shuts Off?

Mar 10, 2012

Fairly new MacBook Pro with OXLion. When I try to turn on the computer, the startup noise and screen appear (grey loading screenwith apple icon). A loading bar at the bottom of the screen fills about a third up, then the computer shuts down again.

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MacBook :: Unable To Use System With Battery / Computer Shuts Down Hwen Start From Battery

Apr 18, 2008

My battery needed replacing for a couple of months before i dropped it from about knee level onto a sidewalk. After the drop I got the not charging icon. I thought maybe the battery had just finally died. so I did not panic about the no charge. The laptop works fine when plugged in to power with the old battery on or no battery at all. Not at all when unplugged.

When I put the brand new battery on the lap top, the computer shuts down halfway through boot up. I tried holding the power button down through boot up reset, as well as removing all power (plug and battery) and holding down the power button for 10 seconds reset.

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IMac :: Shuts Down By Itself?

Apr 10, 2010

My iMac (21.5") turn off by itself and it doesn't turn on until I unplug the AC from the back and let it rest for at least half hour!!! If I try to turn it on I only get fan and drive noise but no screen at all... The longest time I let it rest, the more time that I can use it. I already reset PRAM. I'm runing 10.6.3 and the biggest software I use is ArchiCAD 13...

Does anybody have a similar issue with his/her iMac?

PS. Sorry, I don't speak/write good English but I did my best...

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IMac :: New Alu Just Randomly Shuts Off

Oct 31, 2007

My new Alu iMac just randomly shuts off. It's happened like 5 times (once while I was typing a paper). I have updated to 10.5, and it has happened twice since the install.

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IMac :: Reboots And Never Shuts Down?

Jul 9, 2010

I recently updated to snow and since then have had problems turning off mac. I've reset pram, tried unplugging externals, tried logging out, then shutting down, but every time I hit apple-shutdown it goes black, and reboots. I can put it the screen to sleep with hot corners, but never turns off unless I manually hold down power.

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IMac PPC :: G3 Randomly Shuts Off

Feb 12, 2012

I have an old iMac G3 (400mhz slot loading) that I got second hand for free. When I first got it, it seemed to work perfectly in every way, but the hard disk wasn't very big so I tried to install a new (larger) one. Everything seemed to go fine, but after the upgrade, the computer would only stay powered on for about 10 minutes before shutting itself off. I assumed that it was a problem with the hard disk, so I put the old one back, but the problem persisted. It will only stay powered on for a maximum of about 20 minutes before blinking off and then it has to sit for a while before I can get another 20 miutes out of it

Info:iMac, Mac OS X (10.1.x)

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IMac PPC :: Computer Won't Start / Tried Unplugging And Holding In Start Button

Jun 21, 2012

computer won't start. tried unplugging and holding in start button. After about a half hour and unplugging a few times, finally got it going. Imac G5

Info:
iMac, MacOS X (10.5)

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Desktops :: G5 ISight IMac Shuts Itself Down (OS 10.5.8)

Apr 19, 2010

Have a 17" G5 iMac iSight (OS 10.5.8) that works normally for several hours and then the CPU temperature suddenly spikes and the computer shuts itself down. When I check the Temperature Monitor (application) history graph, it shows normal temperatures and then a spike. There are 3 fans and I don't know which is failing or whether there's something in the temperature sensing that's gone haywire. My only solution is to do a forced restart. By this time, things have cooled and it will work for several hours.

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PowerPC :: IMac G3 Shuts Down During Boot

Dec 25, 2008

I have a 700MHz iMac G3, which froze during DVD playback and it needed to be rebooted. Now it will not boot, the gray screen comes up with the loading circle, but it will just shut down after about a minute. I have reset the PRAM, PMU and it is running 10.4. No beeps or anything when it shuts down, it just turns off.

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IMac :: Shuts Off Immediately After Powerup?

Jun 1, 2009

Sometimes when I turn my iMac on, it'll start doing its thing�light comes on, chime goes, fan whirrs, but then it'll make a strange click/"werrrrh" noise and turn off.It's happened twice to me since I've brought it home from school and each time I just tilted the monitor around while turning it on and it worked.I have been avoiding turning off / restarting my computer because I'm afraid its going to happen and I won't be able to get past it.Could the powersupply be loose or something?

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IMac :: No Warning - Just Shuts Off - Overheating?

Sep 14, 2009

I've been having trouble with my new iMac that i purchased recently (26th of August actually). Whenever I'm doing something CPU intensive, the machine just shuts off, but usually it's not right in the middle of whatever I'm doing, it's after I close the application. For example: I was playing SimCity4 the other day, pretty old game to cause this problem I would think. As soon as I exit the game, the system shuts off. No warning, nothing, just shuts off. This will happen when i close VMs (it actually happened yesterday while I was running the VM), etc. So I've reset the SMC/PMU, PRAM/NVRAM, and I've even reseated the RAM. Still the same problem. I've taken it in to a repair center in town, hoping I'll get it back by the end of the week. Does anyone have any idea why this would be happening?

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IMac PPC :: G4 Starts Up Then Suddenly Shuts Down?

Apr 23, 2012

I have an old g4 , the kind shaped like half a golf ball, which starts up and then quits at different places during the process. Sometimes with the gray screen and Apple logo, sometime later when the OS has fully installed,but fails quite rapidly after that. Then tries to reboot itself with varying degrees of failure.

Info:
mac g4, Mac OS X (10.4.9)

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IMac :: Randomly Shuts Down - Instantly Reboots Itself

Nov 16, 2010

I do not have AppleCare on this machine. I've got a 27" iMac that will randomly shut down, be it in the middle of playing music on iTunes, while I'm typing a document or while the machine is simply in screensaver mode doing nothing. Usually the machine tries to instantly reboot itself. All too often, it cannot be rebooted and I have to let sit for quite sometime before it will even power back on. Lately the problem has gotten worse, almost never reboots by itself.

Finally, in the last few days, it just won't turn back on. Nothing. My biggest concern is that I have an unreleased music album from an instantly recognizable major client on the iMac's hard drive, not due out for many more months and still unannounced. I can't simply take the computer into an Apple store for troubleshooting as those files are worth and could cost me exponentially more than even a new iMac outright ever would.

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PowerPC :: IMac G5 Shuts Down During Sleep Mode

Nov 30, 2006

My iMac G5 (rev A) shuts down immediately after i put it to sleep mode after just starting up the computer. The longer the computer has been on before I put it to sleep, the longer it takes for the computer to shut down while in sleep mode. I already did the hardware test and it said there were no problems.

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IMac :: Suddenly Shuts Down - Screen Warm

May 25, 2009

I received my new iMac on May 20. It is a 3.06 with an ATI card. I have not had much time to use it until this evening. I had been been setting up some bookmarks in Safari and then was working on a spreadsheet for about an hour when it suddenly shut down. The power strip in which it was plugged in still had it's light on. The iMac is the only item plugged into the strip. I then felt around the screen, the bottom section was cool but the top was rather warm.

The temperature in the air conditioned house is 71�F. Programs open at the time were Safari - which was on an idle screen as I had logged out of a site. Two sessions of Finder Entourage Excel - which I was actively using. Is this an over temp shutdown? I recall some people posting the temperature of their Macs. Are there any monitors on the iMac to see how hot it is running? There were no warnings that it was going to shut down.

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IMac :: Shuts Off In Middle Of Loading Screen

Jul 7, 2009

I have a mac mini intel and I was in the middle of working with my blogs, then there was an annoying spinning wheel of death, so normally, I would hold the power button for few button to restart and I did. then when the desktop was loading, everything was back to the "new" desktop with alot of stuffs missing, so I restarted it again using the apple menu, then the startup screen took so long and out of nowhere, it shutted down by itself. I tried to power it on again and again, unplugged the cords, still didn't work.

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IMac :: 20'' Screen Shuts Off When Playing Warcraft?

Jul 20, 2010

when ever i log into world of warcraft. and start playing after five minutes my screen will just shut off but the computer will still be running. maybe the video card ?

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IMac :: Computer Shuts Down After Trash Emptied

Aug 17, 2010

I have an external hard drive connected to my iMac and whenever I want to delete something from the hard drive the iMac gets a gray box message saying it needs to shut down and then it just turns off. How can I delete those files without getting that message?

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IMac :: Automatically Shuts Off When In Sleep Mode?

Aug 18, 2010

It happens from time to time when I put the computer into sleep mode and let it sit overnight.

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Software :: IMac Shuts Off At Random And Not Reboot

Jun 28, 2008

I have a G5 iMac, 1G ram, with three external HD, a MIDI keyboard, and an all-in-one Canon print/copy/scan, running Leopard. Lately, my iMac has been turning off seemingly at random, like someone has hit the power strip (although other things plugged into the strip stay on). Sometimes it will reboot when I turn it back on, sometimes not. When it doesn't, it will get partway through startup, then turn off again. There is no apparent pattern to the point during startup where this happens, it's different every time. Sometimes, it barely spins the HD before going dark again.

I took off the back and checked the power supply LED. It says the power supply is OK. I rebooted via the internal power button, and everything was fine for a couple of days. I set the preferences to "reboot after power failure" so it will reboot when I'm at work. I can go through the Time Machine backup list and see how many times it shut down and rebooted during the day (TM backs up once per hour, so when there is a significant length of time between backups, I know it shut down for awhile). The only recent addition is the installation of MoneyWell software, but this app isn't always running when the comp goes black.

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OS X V10.7 Lion :: IMac Starts To Boot And Then Shuts Off?

Feb 4, 2012

I have a 2009 iMac with SSD drive and 2TB drive.For the last 6 months, I'd get kernel errors every now and again, and I would reboot and things would be fine. A few days ago, the computer totally froze, and when I turned it on, it would shut right off. I tried booting to recovery partition, nothing worked. I took it to the apple store yesterday and they hooked it up to an external drive and then did a diagnostic test and the genius said it needed a fresh install of lion, that something was corrupting it. So we did that (for some reason though, it took about 4 tries for him to get it), and then I took the computer home and ran time machine.

Every thing worked as it should for about 12 hours, I did reboot a few times in that time. Anyways, now, it's back to where it was where I turn it on, there's a status bar on the bottom that fills about halfway and then the iMac shuts down. The apple genius said that a corrupt program/application might be causing that. I find this hard to believe ... I can understand a corrupt program crashing or not starting, but is it possible for that to not allow the computer to even turn on? The other thing is that when the computer crashed a few days ago, I hadn't installed anything new/etc .... ???

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OS X V10.5 Leopard :: Safari Continually Shuts Down On IMac?

Feb 22, 2012

Cannot keep Safari open at all.  When it crashes it asks me to submit problem report to Apple, which I do, and I then get a message saying the problem report cannot be sent, try again later -- which I have done over and over again without success. We can only go on the web now via Google Chrome but we prefer  Safari as our standard browser.

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PowerPC :: IMac G4 Hangs On Grey Startup Then Shuts Down

Sep 12, 2010

My iMac will chime, then hang on the grey apple screen with the spinning gear. After a few minutes, it shuts off. Tried resetting Pram and all... Did not work. I troubleshooted using another website, and found it to be an I/O Error. The issue is I need to reinstall the OS, however, when I boot the install CD it hangs the minute I click the mouse or keyboard.

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IMac :: When Click Shut Down It Just Shuts Down The Whole Computer Not Get To Desktop?

Jun 5, 2009

start up the computer and all is fine it is really cool how you dont see the black screen or anything it is all smooth looking with the setup boxes but when it gets to where you should have the normal desktop this wierd program comes up instead. i cant see the start button or my computer or anything it is like some kind of other program on top of it that i cant quit. i have tried everything but when i click shut down it just shuts down the whole computer not getting me to my desktop.

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OS X V10.6 Snow Leopard :: IMac Shuts Down Or Stops Responding During Startup

Apr 15, 2012

I am having trouble starting my 21" iMac running Snow Leopard after I had shared the HD with my MB-Pro. I had removed the "everyone - Read Only" rights on the HD (on the iMac) and opened sharing so my MB could attach to it. Grey Apple Logo and progress circle upon startup now.Can changing these rights cause the system to not boot? I can go into single user mode but I am not sure what to do then.

Info:
iMac, Mac OS X (10.7)

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Software :: G5 IMac Not Starting Up/after A Few Seconds The IMac Stops The Start-up Routine

Nov 16, 2008

I have a G5 iMac - 2.1 ghz, 20", 250gb hd and 3gb ram, but it has been having problems starting up and it is also going to sleep midway through a task or at random times totally unprompted.

It now almost never starts up first time (I keep the iMac mains power lead always connected and the mains electricity supply turned on at all times now)- sometimes I will get the 'Start-up Chime' and then the cooling fans start spinning very loudly and then after a few seconds the iMac stops the start-up routine, but often when I try to start-up I don't even get the 'Start-up Chime' and I have to leave it for some time before trying again.

I can also now only get the iMac to run as a Firewire Target Disc by starting up with the T key held down and then using an old G4 (400mhz) Powerbook Titanium as the screen/keyboard by using the iMac HD as the startup disc for the Powerbook but this is obviously just a temporary work around.

I have also tried backing up all my data, and reinstalling the Mac OS X onto the iMac but the iMac still will not start-up normal and I still have to use it just as a Firewire HD.

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IMac :: Intel IMAC Wont Start - Monitor Blank?

Jun 11, 2009

I have an Intel IMAC, which is now out of warranty as I have had it for 16 months (and I was dumb enough not to get AppleCare). A few days back, my computer would not startup and everytime I hit the power button, I would hear some spinning noise but no chime from the iMAC. Yesterday, I tried it again and this time I heard the chime but the monitor did not start. I was then able to SSH into the MAC and see that it is indeed connected to the network and booted up, but the screen is still dead. Any ideas what I should do before the painful trip to the apple store ?

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