Mac Mini :: Powers Off Before Boot Completes?
Nov 9, 2009
My Mini powers itself down before it finishes booting.
It's a 1.25Ghz G4 Mini, so it's a few years old. As of the last few days the computer turns itself off. So I push the power button and I get as far as the grey screen and I see the circle logo rotate and I can hear the disk heads seeking if I place my ear near the Mini. But before the OS boots, while the screen is still grey the Mini powers off. It does this with the recovery DVD in the drive too. Either way it never boots
Is there a way to diagnose this?
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Jun 8, 2012
After a forced power down my iMAC won't boot again.
The machine simply powers off after the spinning gear on the gray start up screen spins for a few seconds.Â
I've tried booting in safe mode, doing a PRAM reset and inserting the Installer DVD but I don't even get to any of these steps and the machine turns off.Â
Info:
iMac, Mac OS X (10.5.8)
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Nov 8, 2009
I have an '07 vintage (DVI) Mac Mini I use as a media center. I haven't used it in a few months & its been shut down during that time. I went to start it up today & the power light went on & I could hear the fan start up but no start-up chime & no video.
I did an PMU reset to no avail. I'm thinking the logic board is done (it's under warranty & I have an appt. with a "genius" tomorrow). Just wondering if there is anything else I should try before I bring it in.
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Dec 4, 2009
My first mini has a problem. It will power on with the light and then promptly turn off in about 3 seconds. The hard drive spins up but the fan does not turn on. No image on the screen or anything. the mini is open for diagnosis and will do the same thing if the CPU is not installed. Interesting question what will a mini do when it is powered on but doesn't have its CPU installed?
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Sep 9, 2014
My 2014 21" iMac powers itself down after about 10 seconds while trying to startup in safe boot mode. I'm not even sure why it is trying to start in safe boot mode. I shut it down after a power outage while plugged into an APS UPS. I'm guessing that since I interrupted the auto shutdown it is restarting in safe boot mode. Either way, I get a grey screen with a big apple and a progress bar. The progress bar gets to about a tenth full and the power just shuts off.Â
I've tried starting up while holding the alt key to select the Macintosh HD. The same thing happens.
Info:
iMac, OS X Mavericks (10.9.4)
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Dec 5, 2014
I have a 2010 Mac Pro. I recently had to replace the hard drive, and so installed a fresh new copy of Yosemite from a USB stick. No problems whatsoever, except one: when I click the padlock anywhere in System Preferences to make changes, the words "Authenticating" appear and that's it. It never authenticates. It never prompts me for a password. It just sits there.Â
I tried a few things, including Keychain First Aid. No problems found. I tried erasing the contents of a system folder, per another thread that I'm having trouble relocating. Nada.Â
Info:
Mac Pro, OS X Yosemite (10.10.1)
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Jun 13, 2012
I installed the windows 7 64 bit home premium in my mac pro but drivers are not installed. When I am trying to download the drivers through boot camp, it shows "downloading windows software.." and the progress bar never completes. How I can download win7 drivers?
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Mac Pro, Windows 7, win 7 drivers
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Sep 9, 2014
When i start up my macbook pro it shows a loading icon n after the loading completes it shuts down! What do i do???
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MacBook Pro, OS X Mavericks (10.9.4)
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Dec 7, 2014
Today something strange happened to my macbook pro. I turned it on, and when I went to check for updates the new update was available, so I clicked it.
Once it completed at the app store, it restarted and a whire screen with the Apple logo appeared and a bar.
Literally the bar only completes like 25% of its shading and then it shuts off.
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MacBook Pro (13-inch Late 2011)
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Sep 3, 2014
Starting abnormally, Like when I start my MacBook pro which is almost new. A bar runs on the white screen and then when it reached half way system shut down. Any way to reset my computer.Â
Also, when I am going to option, the system doesn't allow me by saying hard disk is locked.
Info:
MacBook Pro (13-inch Mid 2010), OS X Mountain Lion (10.8.2)
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Nov 3, 2010
I have an older MBP (1.83 Intel Core Duo) When I push the power button, I hear a little electric noise, then a fizzle noise. It won't turn on. However, if I close it almost all the way and turn it upside down, it powers up fine. Once it's running, no issues. Any idea where to start with trying to correct this problem? I don't know what part could be making this happen. And yes, it has to be both upside down and almost totally closed.
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Jun 18, 2008
Lately i've been coming home to find my imac on. I've been shutting it down due to all the thunderstorms in my area. Under the energy saver options, wake for ethernet... isn't checked off. I do run eye tv but i dont have anything scheduled. Is there anything else i should check? I have an external hard drive and printer connected to the usb ports. It's an intel imac, 5 months old, 1 gig of ram and running the latest version of leopard.
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Mar 14, 2012
I have a 17" MacBook Pro which is approx. 7 years old. When I power on, I can hear it booting and the green light comes on, however the screen is
completely black and no keystrokes will change that. I also tried removing the battery and re-installing but to no avail.
Info:
MacBook Pro
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Jun 30, 2014
I have a 2009 macbook pro unibody, I just replaced the battery but my macbook pro 2009 powers off unexpectedly. Sometimes while its plugged in and other times when running on the battery, when it gets to 67% life left it powers down. What is causing this and how can I fix it. I have already had a brand new battery put in it. I am running Mavericks OS currently.
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Apr 12, 2009
Problem: powers up, will not complete start up sequence What led to the problem: Ignorance, mostly. CD was stuck in vertical bay and I tried someone's suggestion to eject via terminal. If you are laughing (and/or groaning), you know what must have happened. Here are steps taken to rectify disk eject and start up problems, with the results. Note: iMac install disk one remains in the vertical bay, unable to be read or ejected. applejack, fsck -fy ... multiple times. Results: disk & permissions repaired and/or verified but OSX still will not start up. It starts with grey screen, goes to blue with grey window. Progress bar moves slowly from left to right and seems to reach 100%. Operation stalls at that point. Note: Any attempt to use diskutil stalls and commands such as list, mount do not execute. drutil eject gave these results: dyld library not loaded: /system/library/Frameworks/OpenGL.framework/versions/A/openGL referenced from: /system/library/frameworks/QuartzCore.framework/versions/A/Quartzcore reason: image not foundTrace/BPT trap
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Mar 14, 2012
I've got a mac that powers up but just show a black screen? Any ideas?
Info:
iMac, Mac OS X (10.7)
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Aug 29, 2014
I have a recently-purchased MBP Retina 15 inch from Mid 2012.Â
Every time that I put my laptop laptop to sleep while it is on battery, it sleeps fine for about an hour. After an hour or so, I hear the boot sound come from the laptop. When I open the screen at that point, the laptop is powered off. I have to power up the laptop. The laptop is not in hibernate mode, but has actually shut down (pressing other keys on the keyboard doesn't wake it up, I have to use the power button). Â
Applications start back up when I log in, however for example VMWare has rudely powered off (so I lose the state of my virtual machines), and any terminal programs that I was running (even if I just had a document open in 'vi') are also terminated.Â
I wonder, what causes this behavior? Is my system defective in some way, or is there an OS tweak in Mavericks to stop the computer from rudely powering off/force quitting all open apps in the process?Â
I've read that OS X now likes to hibernate laptops after an hour, but clearly hibernation isn't what's happening here.Â
Info:
MacBook Pro with Retina display, OS X Mavericks (10.9.4)
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Feb 9, 2010
My early 09 MBP just started having trouble with the USB port closest to the audio in/out. That port powers on my USB gadget, but it doesn't work. i.e. my mighty mouses laser turns on, but doesn't work. Anyone else having trouble with this?
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Mar 5, 2012
MacBook Pro powers up but never gets past Apple icon screen.
Info:
MacBook Pro (15-inch Early 2011)
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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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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 symbol....it 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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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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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. Â
Info:
Mac mini, Mac OS X (10.7.3)
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Mar 5, 2012
Can I boot from a USB drive from a mac mini 2007 OSX 10.6 with a SATA drive? I want to install a Linux OS from a CD onto the USB then be able to select the bootable USB (linux) on startup. I understand that I can boot from the CD by holding down C when retarting the computer. I have also read I can use rEFIt as a boot loader to select whcih bootable drive I want at startup. Unfortuately, I have also read that there may be a problem actually booting from an external device in Mac. IS anyone actually booting form a USB on the mac mini?
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Mar 13, 2012
I have a new MacMini without the optiocal drive. This is a computer that someone tried to put Linux on and left it was a 100gb partition for the MacOS and the rest for the Linux installation. I want to get it back to one large partition.Â
I know that I need to get the computer to boot from something else because the Recovery partition is on the HDD. To that end I have tried to boot this from an external USB DVD-RW drive and when it starts to boot from the disk it reads the DVD and then goes to the 'circle/slash' screen. I then made a USB drive bootable and restored the dmg file for my Lion disk to it and tried to boot from that. It shows in the options and then immediately goes to the 'circle/slash' screen. I tried to flash the PRAM and got the same result. I tested both items on another MacMini and they work. The test computer was a previous model with the optical drive.Â
Info:
Mac OS X (10.7.1)
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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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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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Jul 31, 2009
i've been having some serious problem with my mac mini. Im trying to install a copy of leopard in my new hard drive and every time i try to boot the dvd holding the "c" key, the computer restart.
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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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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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