Mac OS X Leopard - iBook shuts down at 20% with no warning

Since I installed Leopard, my iBook's battery lasts for only 1 hour, compared to the 2 hours (or more) it used to last using Tiger. As if It wasn't enough, it shuts down with no warning at 20%, losing date & time settings and wireless networks passwords. Does anyone know what's causing the problem? Is Apple planing to solve it? Thanks

Have you tried the information in KB 86284, Calibrating your computer's battery for best performance?

Similar Messages

IBook Shuts Down at Gray Apple

I have a 12" iBook 700, 384mb RAM, panther. Everything fine on it, except the DC in jack is non-functional. I've been charging the battery externally and that's worked great until yesterday.
So, here's what happens:
• I hit POWER
• iBook powers up, I hear all the drives etc
• I see the gray apple for Approximately 5 seconds
• The iBook shuts down.
It actually reminds me of trying to boot with a dead battery (which mine is not)
Here's what I've tried:
Reset PRAM
Reset PMU (many many times, varying lengths)
Booting from OSX CD (OS 9, 10.2, 10.3)
Booting from FW hard drive
Pulled extra ram.
Swapped in alternate ram
All of these result in the shut down after 5 seconds.
If I boot with OPTION held I can see the available drives and let it sit like that till the cows come home. No shut down.
If I boot into Target Disk mode, it mounts and acts perfectly on the other mac.
BUT, if I boot with an OS 9 CD it gets all the way past the OS 9 screen before shut down, like 20-45 seconds.
And if I boot with an NON Mac OS (Ubuntu, or YD linux) it works just fine, no shut down. So I don't think it's the Logic Board, right?
I'm confused. Could this still be tied to the DC board? Maybe it's getting a signal that it has no battery power somehow? I tried disconnecting the board from the Logic board completely, but problem persists. Could just having the board missing cause this? I ordered a replacement for a minimal amount, just in case.
What else could it be? Could the MB ram have gone bad or something?
It doesn't seem to fit the motherboard video problem that used to be so popular. Any ideas?

I only just came across this thread, so I'm too late to the party to be of any help, I think.
But I've noted - on a variety of Macs from G3 PowerBooks onwards - that if a battery is too deeply discharged it may tell the system (..but I don't know which bit of the system; obviously a bit of system software..) that it cannot be charged. At that point the system closes down.
The DC input may also be notified that the battery is "unchargeable", and therefore some software control appears to fail to charge it.
It often happens - or has happened to me - that if the problem battery is put in a different Mac it may accept a bit of charge, at which point the "won't work" signal is revoked, and it will work OK in its usual device.
I've sometimes applied a charge directly to a recalcitrant battery from a desktop variable low voltage power supply (..you know: those boxes with knobs and an ammeter and voltmeter on the front..)
..and that's "kickstarted" the battery enough for it then to behave properly again.
Er, sorry not to have replied sooner..

Mac book pro trys to shut down while downloading?

my mac book pro trys to shut down while im downloading for some reason..

Hi Monroeeugene,
I'm not sure if you mean shutting down or going to sleep ... but this article will explain how to change your sleep settings so your downloads don't get interrupted.
Mac Basics: Set your preferences
http://support.apple.com/kb/ht2490
Change your Mac's sleep settings
To conserve energy, all Macs have the ability to sleep. When you haven't used your Mac for a set amount of time, it enters a low-power mode until you wake it by pressing the keyboard, trackpad, or moving the mouse. Sleep doesn't turn off your computer; it merely puts it into an inactive state that consumes less power.
Open System Preferences
Choose View > Energy Saver.
Choose the Power Adapter or Battery tab. If you're using a desktop Mac (a Mac mini, iMac, or Mac Pro), the Power Adapter and Battery tabs do not appear.
Move the sliders for both the computer and display to change the times in which they go to sleep.
Select any other options you want, such as sleep and wake.
Hope this helps ...
- Judy

Mac book pro, overheats and shuts down as 2 hours the use

mac book pro, overheats and shuts down as 2 hours the use

Hi, I am facing the same issue.
Did you able to solve your issue? Please advise.

Mac book pro mid 2009 shuts down after a few hour then will only boot after waiting and pressing power button numerous times. I am running mountain lion with most recent updates.

Mac book pro mid 2009 shuts down after a few hour of use and then is very difficult to reboot. Sometimes I have to wait hours, sometimes I have to repeatedly press the power button and then it will slowly start a little longer each press untill it completely boots. It has done this three times know. Each time I was watching a video.

Try running the Apple Hardware Test - sounds as if you've hardware issues.
Clinton

New Mac Pro (quad) does not shut down!

Hey guys
I've just taken delivery of a new Mac Pro for my home music studio, and have loaded up various software such as Native Instruments Komplete, BFD3, Sympobia etc... and Logic Pro X.
In the last two days, whenever I shut down the Mac Pro, it goes to a grey screen (light grey) with the mouse pointer still visible, and then just freezes and doesn't proceed to power off.
Before I provide further information, does anyone have an idea of what might cause this behavour and anything I should be trying to resolve it?
Cheers and thanks,
Mike

yeloop wrote:
...does anyone have an idea of what might cause this behavour and anything I should be trying to resolve it?...
I don't know what might be causing that but one way to find out is to set your Mac to start up and shut down in "verbose mode."
To turn on Verbose booting, at the Terminal type the following:
sudo nvram boot-args="-v"
Disabling Verbose booting is just as easy:
sudo nvram boot-args=
You'll see the various steps the Mac runs through to boot and to shut down. When it hangs, you'll be able to see what point it's hanging at.
BTW, did it behave this way before you loaded up all that software?

Mac 10.6.8: click shut down from menu, it goes to sleep.

Hi there, I've just noticed this recently, that when I shut down my mac, I figure it has shut down, the sleep light doesn't flash so it looks good.
But when I come to turn it on in the morning, I press the power button, I realized that it's been in sleep mode all night.
I used the terminal and command force quit and it worked for that time but I'm still having problems.
How do I fix this?

nye123 wrote:
Mac 10.6.8 shut down and would not restart. Took to tech, on bench for few days, then started up fine. Two months later sequence repeated. Now working fine. Problem??, as I suspect it will recur.
What did he tech say about a possible cause? Run the hardware test which is on disc 1 of the System DVD that originally came w/your comp. Post the results.
CLICKY CLICK--->http://support.apple.com/kb/TS1365 Intel-Based Apple Portables: Troubleshooting a computer that will not power on
CLICKY CLICK--->http://support.apple.com/kb/HT1379 Resetting your Mac's PRAM and NVRAM
Or you can take your comp to your local AS or an AASP. Diagnostic testing is FREE!

2008 Mac Pro 10.5.8 shuts down after hours of no use, Set to never shut down. Can be resumed pressing any key but all programs not in startup list need to be restarted and unsaved data lost .   New behavior. No system changes.

2008 Mac Pro 10.5.8 shuts down after hours of no use, Set to never shut down. Can be resumed pressing any key but all programs not in startup list need to be restarted and unsaved data lost .   New behavior. No system changes.

2008 Mac Pro 10.5.8 shuts down after hours of no use, Set to never shut down. Can be resumed pressing any key but all programs not in startup list need to be restarted and unsaved data lost .   New behavior. No system changes.

IBook shuts down without warning with 3rd party battery.

Can you iBook G4 folks with battery savvy please check out my iBook G3 question:
http://discussions.apple.com/thread.jspa?threadID=1743983&tstart=0
To summarize, my brand new 3rd party battery causes the battery icon to go red after 3.5 hours run time with 1 hour left (23%). The iBook shuts down with 13 minutes left (4%) but doesn't get to 10 minutes so no warning message.
The distributor said some G4 iBook owners also reported the same strange behaviour.
Does anyone have any ideas or has anyone else experienced this? Yes I reset the PMU - no difference.
Mrs H

All the literature from Nu Power says I should get the warning - it's just that the battery shuts down before it gets to 10 minutes left when the warning SHOULD (they say) appear. Another conversation with the techies confirms that the message should appear.
I have recalibrated it thrice, each time it runs a little closer to the 10 minute mark for time left. I'll keep trying.
Trouble is we are leaving for a trip very shortly and don't have time to return this 2nd Nu Power and try for another brand.
I get about 5 hours of run time when trying to discharge the battery fully as quickly as possible by having screen at its brightest, while running iTunes with visualizer on and receiving a radio broadcast.
How much time do you get on your new Apple battery? (on a G4?) We are going places where we will be without electricity for a day or so and the long charge and run time are our prime necessities.
Thanks for your reply,
Mrs H

I am using Lan Card in Mac OS version Yosemite. When i remove Lan card it shut down system automatically with some message in chineze language. Before updating to yosemite it works fine.

I am using Lan Card in Mac OS version Yosemite. When i remove Lan card it shut down system automatically with some message in chineze language. Before updating to yosemite it works fine.

Sounds like a kernel panic. Lag the panic and post it here:
Mac OS X: How to log a kernel panic
BTW, this is the Mac Pro desktop forum.

Ibook shuts down on battery power

Same problem as others when on battery power. ibook shuts down after 10 to 30% on battery
Battery info:
Battery Information:
Charge Information:
Charge remaining (mAh):    2000
Charging:    No
Full charge capacity (mAh):    2010
Health Information:
Cycle count:    0
Condition:    Good
Battery Installed:    Yes
Amperage (mA):    0
Voltage (mV):    16584
This is while on AC power. Can anyone help?

It runs on battery power but shuts down between 10% and 50% of usage. I had to replace my adapter after accidently kicking it while it was plugged into computer. Since I bought a new adapter the battery indicator shows that it is charging until full charge. The battery is bout two years old. May have damaged the dc board when I tripped over the original power cord.
More accurate battery info:
Battery Information:
Charge Information:
Charge remaining (mAh):    932
Charging:    Yes
Full charge capacity (mAh):    2010
Health Information:
Cycle count:    216
Condition:    Good
Battery Installed:    Yes
Amperage (mA):    1198
Voltage (mV):    16306
The previous battery info was while on AC power and the indicated a full charge

My Mac Book Pro 13 inch shuts down when I insert some usb on port. It will be dead for few days (no power, can't charge as well, no restarting) and after few days it will work? Any one facing same issue and any solutions please...

My Mac Book Pro 13 inch shuts down when I insert some usb on port. It will be dead for few days (no power, can't charge as well, no restarting) and after few days it will work? Any one facing same issue and any solutions please...

Hi ohmghimire,
Thanks for visiting Apple Support Communities.
If you're seeing unexpected behavior when using USB devices, try resetting the SMC on your MacBook Pro:
Resetting the SMC on portables with a battery you should not remove on your own
Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
You can find the article with these steps here:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
If you still see this behavior after resetting the SMC, or your computer won't turn on, try the steps in this article next:
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/ts1367
Best Regards,
Jeremy

Purchased Lion, installed it - once I log in - i get the curtain and message to hold the power button till it shuts down. Worked with the disk repair utility - fixed permissions - still can't get past the "black curtain of death" any suggestions?

purchased Lion, installed it - once I log in - i get the curtain and message to hold the power button till it shuts down. Worked with the disk repair utility - fixed permissions to hold the power button till it shuts down. Worked with the disk repair utility - fixed permissions - still can't get past the "black curtain of death" any suggestions?
My machine was patched to date 10.x.x. I was lucky to get an internet connection and I selected the option to re-download Lion... its curruently being downloaded. What if that doesn't work?
Any thougths would be appreciated.
Joe

And you have a workstation? not a notebook.
Usually a driver or hardware, nothing that Disk utility will fix.
You know of course what a Prohititory Sign is?
prohibitory sign, kernel panic
Forum devoted to Lion:
Mac OS X v10.7 Lion Communities
Tips and FAQs
FAQ kernelpanic
Resolving Kernel Panics
Avoiding eliminating Kernel panics
Lion App Compatibility Table - RoaringApps
RoaringApps Mac OS X Lion Application Compatibility
did you make sure your apps, drivers, and hardware support Lion?

Imac won't shut down, blue screen with spinig wheel is on and computer never shuts until I hold the power button down and shut it manualy..

Imac won't shut down,
blue screen with spinig wheel is on and computer never shuts until I hold the power button down and shut it manualy..

This is the instruction article for Intel-based Macs:
http://support.apple.com/kb/HT3964
Your profile does not indicate the type of Mac you are using.
Barry

In IE if I set the zoom at lets say 150% it will stay that way even if I shut down. But with firefox, it goes back to small print every time I view a new page. Is there a way to set the zoom to stay at a larger size? Thanks, EH

# Question
In IE if I set the zoom at lets say 150% it will stay that way even if I shut down. But with firefox, it goes back to small print every time I view a new page. Is there a way to set the zoom to stay at a larger size? Thanks, EH

If you need to adjust the font size on websites then look at:
* Default FullZoom Level - https://addons.mozilla.org/firefox/addon/6965
* NoSquint - https://addons.mozilla.org/firefox/addon/2592
Your above posted system details show outdated plugin(s) with known security and stability risks.
*Shockwave Flash 10.0 r45
Update the [[Managing the Flash plugin|Flash]] plugin to the latest version.
*http://www.adobe.com/software/flash/about/

Mac OS X Leopard - iBook shuts down at 20% with no warning

Similar Messages

Maybe you are looking for