My G5 Power mac keep shutting down

Hi,
All of a sudden My mac keeps shutting down, I have installed nothing recently no changes nothing for months
and all of a sudden it keeps shutting down.
Check the hard disk using disk utility and it says it appears to be okay
CPUs running at 60 to 62 degrees
please help
John

I believe -122 is a power issue...
Might be time to replace the PRAM Battery, 4 years is close to their lifespan, far less if ever without AC power, & can cause strange problems...
See which one your G5 has...
http://eshop.macsales.com/item/Newer%20Technology/CR2032/
http://eshop.macsales.com/item/Newer%20Technology/BAA36VPRAM/
Have you blown the dust out lately? especially the Power Supply?

Similar Messages

Mac keeps shutting down

Hi,
this is a bit of an awkward problem – not sure if someone can help me out.
I work on a MacPro (early 2008) but have updated it with two hard drives (SSD) and 24 GB RAM. So it works pretty well.
The computer is connected to a battery back up because we have lot's of brown outs in my area. My computer battery got fried 2 years ago (after a black out) and I think I have a third party battery now in the machine.
Everything has been working fine these last two years but now my Mac keeps shutting down and tries to start up again without success. I tried to find the problem and tested a new external battery back up, which wasn't the problem. I check our electrical outlets. They seem to be OK, though the electrician found out that they weren't wired properly – so he fixed it. And it works fine for a week. During that week I unplugged the computer from the outlet so that the internal battery can drain. When I stopped doing that and left the cable in the machine over night, the problems came back and the Mac kept shutting down. So my guess was, that there is something wrong with the internal battery of the computer. The strange thing is that the Mac works fine when I plug it with an extension cord in an outlet downstairs. This is confusion since there might be really an electrical issue in our home (?)
Then two days ago I realized that my memory RAM shows up only 12 GB instead of 24 GB. So I took the RAM out, dusted everything and put the RAM back in. The Mac was back at 24 GB.
So far the Mac hasn't tried to shut down on it's own. The cable is plugged in in my office outlet; not the ones which worked fine downstairs but I unplug it over night; just in case. As you can see, there is a lot of confusion in finding the problem. Perhaps the shut downs were related to the RAM? I'm just concerned that the problems come back.
Has anyone a clue what the problem is/was. Has anyone experienced something like this before?
Thanks for you input.

I assume that you realize there are cheaper and now better FBDIMMs should you need to narrow down and find any that are offending?
Often heat and dust, and FBDIMMs run hot, age, go bad over course of time. New ones run cooler, that helps.
That you have now probably a 900W or higher, 1500VA UPS, and that you should not have to turn off, leave it on, shutdown or leave the Mac running, up to you.
Resetting the SMC and NVRAM probably done more than enough. USB devices are also able to cause erratic behavior. Been there and done that.
We also have a fair share of power oddities and UPS is a must - all my TVs and such have one, any electronics and floor lamps.
But you also want your modem, router, and important equipment on UPS too, and I found my old APC would interfere with modems and routers, my new-ish Cyberpower do not and work fine so I feel more protected (having had a modem problem is no fun, it was semi functional, semi not (illiterate) if you will (now have spare modem and router too). If you don't filter the RJ45 out of the modem, there can even be too much for the router or the RJ45 ports is what APC told me in a conversation years ago.
3,1 has been more prone to shutdown issues. So yes there are - some early versions of 10.8 for some, for others it was that they upgraded from 10.5 on and had never made a clean break esp. when Lion dropped support for older Rosetta dependent code.

My mac keeps shutting down by itself

My mac keeps shutting down by itself. Seems to be when I'm trying to edit video on FCPX or when kids are playing a game. Its an older 2009 20" imac 2.66 Ghz Intel core Core 2 Duo running OS X 10.9.4
How can I stop this please? Thanks

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
For this step, the title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
In the top right corner of the Console window, there's a search box labeled Filter. Initially the words "String Matching" are shown in that box. Enter "BOOT_TIME" (without the quotes.)
Each message in the log begins with the date and time when it was entered. Note the timestamps of the BOOT_TIME log messages, which refer to the times when the system was started. Now clear the search box and scroll back in the log to the last boot time when you had the problem. Select the messages logged before the boot, during the time something abnormal was happening. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
For example, if the system was unresponsive or was failing to shut down for three minutes before you forced a restart, post the messages timestamped within three minutes before the boot time, not after. Please include the BOOT_TIME message at the end of the log extract—not at the beginning.
If there are long runs of repeated messages, please post only one example of each. Don’t post many repetitions of the same message.
☞ When posting a log extract, be selective. A few dozen lines are almost always more than enough.
☞ Some private information, such as your name, may appear in the log. Anonymize before posting.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Step 2
In the Console window, select
          DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A crash report has a name that begins with the name of the crashed process and ends in ".crash". A panic report has a name that begins with "Kernel" and ends in ".panic". A shutdown stall report has a name that ends in ".shutdownstall". Select the most recent of each, if any. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot. It's possible that none of these reports exists.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
☞ If you don't see any reports listed, but you know there was a crash or panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
☞ Please don’t post other kinds of diagnostic report—they're very long and rarely helpful.

My Mac keeps shutting down for no reason

My Mac keeps shutting down for no reason

We have no way of see your Mac so you are going to have to tell us
exactly what model of MacBook Pro you have
disk space
amount of RAM
what operating system are you running
any error message you might be seeing
Allan

Power Mac G4 Shuts down at start up

Hello,
I have a power mac g4 that Shuts down at start up. It will get to the white screen with the apple for about a minute and then shut itself down. I tried starting up from a disk and it doesn't even get that far.I haven't replaced any parts yet but I was wondering if it may be a problem with the computer's power supply. Any suggestions are appreciated, Thanks

You may need to reset the logic board. If you open the side of the G4, you should be able to find the reset switch.
Unplugging it first would be a good idea.

My Power Mac G4 shut down instead of sleeping

Is there anyone out there having this problem..?
When I put my PM to sleep it shut down instead. If I try to restart it right away it starts booting but fails after a couple of seconds and shut down again. If I wait for a longer while it starts like it should!?
I have tried to replace the backup battery with no luck.
Power Mac G4 "Quicksilver" Mac OS X (10.4.8)

Hi! - I had a similar problem with my G4 which I bought second hand. It would sleep and then when I tried to awaken it - it would then shut down. Long story short - it had a third party Airport card which I removed as I did not need it - problem solved! Seemingly third party bits and pieces can sometimes cause this problem.
Hope this helps.
G4 Power Mac Mac OS X (10.3.9)

Done everything, yet my Mac keeps shutting down when in sleep mode

I have reviewed all the topics here and nothing quite matches my problem.
When I put my computer to sleep, after about 30 minutes, it shuts down.
I have vacuumed the vents.
I checked Console for warnings (there are none).
I reset the SMU.
I reset the PRAM.
It is out of its warranty with Apple Care ... is my computer dying??
Any ideas what to do next?

ivanguy35 wrote:
I have reviewed all the topics here and nothing quite matches my problem.
When I put my computer to sleep, after about 30 minutes, it shuts down.
I have vacuumed the vents.
I checked Console for warnings (there are none).
I reset the SMU.
I reset the PRAM.
It is out of its warranty with Apple Care ... is my computer dying??
My 3.5 year old 20” G5 iMac recently started doing the exact same thing! It does not seem to be heat related, and there are no warnings in the console either, and it was not part of the ones identified with possible power supply issues.
I’ve checked all of the preferences and settings, ran Disk Warrior and Disk Utilities, checked file permissions (all were OK). Mine only seems to power down after it goes to sleep (but not every time), never in the middle of doing anything. So far, I’ve only noticed it when some of my external fire wire drives are powered up, but that could be a coincidence.
I was beginning to think it’s some sort of software bug, but I suppose it could be a hardware fault with the logic board. But since you are having the same issue, maybe it is software afterall. My software is totally up to date, but it seems that I’ve only started having this problem after installing 10.5.6.
Here’s my thread:
http://discussions.apple.com/thread.jspa?threadID=1867388&tstart=0

Mac keep shutting down after cancelling Snow Leopard upgrade DVD

Hello,
I tried to upgrade my computer with the Mac OS X Snow Leopard DVD. The upgrade failed twice, so I decided to quit it and to restart my computer with hardware, but then, it doesn't run more than 35 sec and then shuts down automatically. I have tried 5 times to restart it, but it shuts down even before I can see my desktop. Ho yes, and I ejected the DVD from it.
...help please! : )
Thank you!

Sounds like you've damaged your system by forcing it to quit and restart in the middle of installing. You probably also had something wrong with your machine that was interfering with the installation in the first place, as the Snow Leopard installer is ordinarily pretty good at failing without damaging anything if something causes it to fail.
I would advise [repairing the hard drive with Disk Utility|http://support.apple.com/kb/TS1417]. If that fails, you'll need to erase and repartition the hard drive and reinstall Snow Leopard from scratch. If repair works, but you still can't boot, you probably have corruption in important system files. You could try installing Snow Leopard over it at this point, while booted from the Snow Leopard disk. If repair shows no problems, post back here, as you've got something a little more exotic than simple hard disk damage going on.
Do you have a backup? If not, it's possible all your data might be gone at this point, depending on what exactly has gone wrong with your computer. You can try to back up from Disk Utility running from the Mac OS X install disk... see the Restore tab. You'll need an external hard drive to which to copy.

Power Mac G5 Shuts Down When Waking From Sleep

I picked up a Power Mac G5 for a song at work. It had OS X Tiger 10.4.11, 1 GB RAM and 160 GB HDD, I've since upgraded the RAM to 2 GB, the HDD to 1 TB, and installed OS X Leopard 10.5 from an install disk I had bought when it first came out, and then upgraded to 10.5.8. It works and does what I want it to do.
It refuses to wake up from sleep since I first brought it home.
When it goes to sleep, the power light pulses like it should. However, when I move the mouse or press a key, it does a hard shutdown imediately. I've explored the suggestions here and searched on the internet for a solution.
Here is what I have done:
1.     Unplugged everything but the keyboard and monitor
2.     Replaced the keyboard with another white one that had never been used
3.     Replaced the battery on the Logic Board
4.     Pressed the SMC button on the Logic Board
5.     Did a PRAM reset
6.     Erased, partitioned the disk, and reinstalled Leopard from scratch
There are no extra programs loaded, only Leopard and the programs that came with it.
I've changed the Energy Saver Preference Pane to never sleep:
This is not going to kill me if the best option is to never sleep.
Everyone have a nice day.
Boyd

Boyd Porter wrote:
It is on an APC ups, so it could be a flaky power supply. At least it doesn't do any spontaneous shutdowns, yet, so I can live with it. If it dies, I will buy a new MacMini.
I had a similar sporadic problem with my G5 on a UPS which was failing. The surge on wake was enough to sag the power causing the PSU to kill the power supply. The UPS finally tanked and getting a new one cured the problem. You might see how it reacts on normal mains power as an experiment.
Also, never underestimate the capacity of a G5 power supply to accumulate dust, which reminds me that it is time I blew out my power supply dust, since it's been about a year since the last cleaning.

The connection of my MAC keeps shutting down!

I have a problem with my connection. It keeps shuting down almost every 15 minutes (technically not connected) but it's still somehow connected. I've checked for the diagnosis and it appeared that ISP, Internet, and Server are failed. If I turn off-then-on the wi-fi of it returns. AND SO ON..
Can I deal with such a problem from here (If yes how?) OR should i take the device to the company ?
please help,
Thanks

Please test after taking each of the following steps that you haven't already tried. Stop when the problem is resolved. Back up all data before making any changes.
Step 1
Take the applicable steps in this support article. The Wireless Diagnostics program generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.
Step 2
Disconnect all USB 3 devices. If you don't know which are USB 3, disconnect all USB devices except keyboard and mouse.
Step 3
If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. If you find that Wi-Fi works better with Bluetooth disabled, you should use the 5 GHz Wi-Fi band. Your router may not support it; in that case, you need a new router.
Step 4
Open the Network pane in System Preferences and make a note of your settings in the Wi-Fi service. It may be helpful to take screenshots of the various tabs in the preference pane. If the preference pane is locked, unlock it by clicking the padlock icon and entering your administrator password. Delete Wi-Fi from the service list on the left by selecting it and clicking the minus-sign button at the bottom. Then recreate the service by clicking the plus-sign button and following the prompts.
Step 5
Reset the System Management Controller.
Step 6
Make a "Genius" appointment at an Apple Store, or go to another authorized service center.

My Mac keeps shutting down.

Hi there,
Can anyone tell me why my iMac G5 (not intel) seems to suddenly and randomly shut itself down and reboot. I suspected it might be a CPU temperature issue but It does this even when no programmes are running. It did this about 6 months ago but then seemed to work fine again.
Does anyone have any suggestions?
Thanks,
Julian, UK

Hi Julian,
Boot off your Install Disk while holding down the *d key*, (not c key), then run the extended Apple Hardware Test.
Then get Applejack...
http://www.versiontracker.com/dyn/moreinfo/macosx/19596
After installing, reboot holding down CMD+s, then when the DOS like prompt shows, type in...
applejack AUTO
Then let it do all 5 of it's things.
At least it'll eliminate some questions if it doesn't fix it.
The 5 things it does are...
Correct any Disk problems.
Repair Permissions.
Clear out Cache Files.
Repair/check several plist files.
Dump the VM files for a fresh start.
First reboot will be slower, sometimes 2 or 3 restarts will be required for full benefit... my guess is files relying upon other files relying upon other files!
Disconnect the USB cable from any UPS so the system doesn't shut down in the middle of the process.

Power Mac G5 shuts down on startup

The machine will begin to startup with normal chimes and get to the gray Apple screen and then shutdown, pause for a few seconds and then try to startup again. It will then continue this cycle until I hold the power button down and shutdown the computer.
Onboard battery is 3.66 volts according to my voltmeter. Haven't had a chance to try the SMU reset yet.
It's done this before and after a few attempts would finally start up and run fine but this time it's not wanting to restart.
Any other ideas of what might be going on?
It's a Dual 1.8 Ghz/900 Mhz bus with 3.5 GB of RAM and is running 10.5.5 with firmware 5.1.5f0.
Thanks!

Thanks for the quick response. Will try the SMU reset at lunch today.
It has one internal drive, one external, a scanner and printer attached will disconnect the external stuff and try again.
Dustwise it's a pretty clean machine, I've seen much worse but will clean it out a little more too.

My mac keeps shutting down without warning

Can anyone help. My imac will suddenly turn itself off, this happens when I am not online and I can start it again immediately.

What model iMac do you have? G3, G4, G5, Intel-based? How old is it? What OS are you running, 10.3, 10.4, 10.5, 10.6, etc.
It sounds like your power supply is going bad. Here's a link to an old discussion with a similar sounding problem:
https://discussions.apple.com/message/1938289#1938289
This may or may not be a repair that you can do yoourself, depending on you iMac model. I've never had to do this repair so I can't help you out that way.
Good luck.

Mac pro keeps shutting down without warning

I have a 15 inch Macpro running Mac OS X Lion, version 10.7.3. It keeps shutting down without any warning. The screen just goes black and I have to press and hold the power button for a while till a hear a sound to turn the system off. This is happening like, more than 5 times a DAY. Please help, any suggestions are welcome.

Dose this issue happen when the computer is plugged in? or only when it's unplugged from power?
Have you checked for software updates? if so, have you installed all the updates? (apple menu, software update, install updates, reboot, repeate untill there are no more updates)
If the issue is happening while power is plugged in, have you tried a SMC Reset and NVRAM Reset?
Is there any thing externaly connected to the computer besides power? if so, haveyou tried removing those items; to see if the issue only happens while those devices are connected?
Do you know if yoru MacBook Pro has a NVIDIA GeForce 8600M GT? (apple menu, about this mac)
Do you have any kind of keyboard cover? if so, have you tried removing the keyboard cover, dose the issue still happen?
You could also try running an Apple Hardware Test. If it give you any error codes; I would suggest writing down the exact error message it displays.
Also it might be a good idea to set the graphic card to run on the high end card; and see if the issue still happens. (apple menu, system prefrences, energy saver, At the top there should be a check box along the lines of use best graphic performance at all time, check this box)

Why does my mac book keep shutting down? I mean it's on and then off suddenly

Why does my mac book keep shutting down? I mean it's on and then off suddenly

Do any informative dialogs appear after you restart it?
Power or other problems related to unexpected system sleep, shutdown, lights or fans call for an SMC reset. Read all the steps.
Before Resetting the SMC
Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.
Press Command + Option + Escape to force quit any application that is not responding.
Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.
Resetting the SMC on Mac portables with a battery you can remove
Shut down the computer.
Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery (to remove the battery - click here: MacBook or MacBook Pro).
Press and hold the power button for 5 seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.
Still having problems? Replace steps 6 and 7 with the following:
Reconnect just the MagSafe power adapter.
Press the power button to turn on the computer,
Then reconnect the battery.
Resetting the SMC on portables with a battery you should not remove on your own
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if it's not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. The power adapter indicator light will cycle off / on once.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.

My G5 Power mac keep shutting down

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