Macbook - Unplug AC power and Mac enters sleep mode

I am using a Macbook with a Dell 24 inch monitor, external keyboard and mouse. The lid is usually closed and I am familiar with the best practices how to use sleep mode.
I have now found that, in the above scenario, unplugging the power cord puts the Mac to sleep immediately. The batter is charged at 99% or better.
The reason why I want to unplug: let it drain to condition the battery according to Apple recommendations.
I am aware of the workaround: disconnect external peripherals, let Mac run on battery until it is drained (I like to think that the peripherals perhaps are part of the issue here).
I was simply wondering if putting the Mac to sleep when AC power is disconnected is a feature, or if anyone here has a suggestion. This has not previously happened to me when I used the Mac without the monitor/keyboard.
Thanks!

It requires the power adapter when using an external display. The electronics to drive a DVI port uses some power, and they assume power must be available if you have some place to plug in the external display, so they don't allow it to run an external display on battery only. To drain the battery, disconnect the external display, and run it at full brightness with the llid open and Energy Saving system preference set to never sleep the drive, display, or computer, and to run for maximum speed. You only have to calibrate a battery once. NiCads needed conditioning. Lithium-ion don't. Under some conditions you might extend the life slightly, but full discharges reduce life, so getting it just right is unlikely.

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MacBook starts and instantly enters sleep mode

In the past few days I've been experiencing a reoccurring problem with my macbook pro. I press the power button, hear the startup of the drive, and then sometimes the display will turn on for a second(mostly stays off), and then enters sleep mode instantly. I can not get on my macbook unless I turn it on and let it sit for 15-20 minutes, then MAYBE the display will activate. Please help.

Do you hear a chime at startup? How do you know it is entering sleep mode and not turning off? Does the cursor move on the screen? Here is something from another user's experience:
I had the same issue with my 2008 iMac and Apple support walked me through the fix yesterday...
1. Shut the computer down by holding the power button for 10 seconds
2. Restart the computer and press shift at the same time until you see the progress bar start moving
3. Once you reach the point where your screen goes dark and you see the cursor, type the first letter of the username for your computer, then hit Enter, then type your password, then hit Enter.
4. After a moment, you should see the spinning beach ball
5. Your screen should then move on to something along the lines of "Completing OSX Installation" (I can't remember the exact wording). Let it finish. After that it should go to your normal desktop and the issue should be fixed. (If your screen goes pitch black during this process, hit the space bar. I thought it wasn't working, but the screen was just sleeping).
Apparently it's an issue with an automatic update that never quite got past the login screen.
MacBook Pro (15-inch, Mid 2010)- Intermittent black screen or loss of video

TS1538 ipad does not come on once its unpluged from power source,it enters recovery mode when both power and home botton are pressed with usb on powersource but does not come up at all when connected to computer or out of power source

ipad does not come on once its unpluged from power source,it enters recovery mode when both power and home botton are pressed with usb on powersource but does not come up at all when connected to computer or out of power source

What model iPad do you have? If it's an iPad 1, the battery may have expired and needs replacement.
 Cheers, Tom

Lightroom 4.3 Stopping processes when Mac enters sleep mode

I have been finding that when i have a process running that requires some time to complete in LR 4.3 (e.g creating timelapses, or exporting large sets of images, or creating many 1:1 previews), that if my mac goes to sleep these processes stop.
When I wake my Mac again these processes start up again though.
After a little reading I seem to have found that the latest mountain lion upgrade has removed a macs ability to check hard drive activity before going totaly to sleep. So previously the screen will be sleeping but processes can run in the background.
If what I have read is accurate this is also true for downloads and other processes.
Furthermore they go on to say that applications now have to create "power assertions" to keep processes running.
I assume Lightroom does not yet have these? Are they looking into it?
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Some people havce mentioned the Caffene app, but would perfer a better solution.
Thnx

The Caffiene app works a treat - I've used it for years. You could also add a feature request at Official Feature Request/Bug Report Forum

My macbook pro 2.0 early 2011 will not go to sleep with the power source connected. only enters sleep mode when running on battery. Someone did this happen, and it could solve?

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There is no output from that command line? Maybe the pid changed.
I'll repeat what I am trying to find out...
1. You do a pmset -g on the terminal.
2. The output from that pmset should have a line that says "sleep 0 (imposed by n)" where n is some number.
3. The ps ax | grep n is supposed to display what the process associated with n is.
It's the output from step 3 that should indicate what is causing you not to sleep.
But speaking of sleep, that's where I am going.

I unplug my MacBook Pro from power and external speaker and I hear incremental beeps and sounds as if email being sent. Doesn't' stop until I close email

I unplug my MacBook Pro from power and external speaker and I hear incremental beeps and sounds as if email being sent. Doesn't' stop until I close email. Not sure what is happening our what if any emails are being sent.

You can install Temperature Monitor and have a look if the CPU oder GPU oder something else went to hot. The processor has a built in safety mechanism to shut down the computer before taking damage.

Mac mini keeps entering sleep mode

Hi. I have a Mac mini that has this annoying problem where it keeps
wanting to enter sleep mode. This problem seemed intermittent at first.
What I notice is that my mini would enter sleep mode whenever I try to
encode mp3. This seems reproducible. When it enters sleep mode,
I can wake it up by pressing the power button. However, it goes back
in sleep mode after a couple seconds after it wakes up. The only way
I can get it out of sleep mode is to quit iTunes and eject the audio
CD.
Things I've tried:
Energy Saver settings: Computer sleeps after 3 hours inactivity,
display sleeps after 3 hours inactivity, unchecked "Put hard disk(s)
to sleep when possible". I tried disabling energy save. No luck.
I also tried to uncheck "Allow Nap" box in the Processor settings.
However, it always checks this after a reboot.
If I insert a DVD movie, I can watch it w/o any interruption.
Anyone else seen this problem? Thanks in advance.
Jim

Hi Carl. I was unable to find com.apple.AutoWake.plist in my
system. Deleting com.apple.PowerManagement.plist didn't
help.
I decided to try your open firmware instructions. I like the
boot loader. It reminds me of the Sun's boot monitor.
I did the reset-nvram, set-defaults, reset-all. It didn't
help though.
I don't think it is my power supply, either. The reason why I
don't think this is the problem is I can watch DVD and listen
to audio CD just fine. My sleep problem would only occur
when I try to rip an audio CD. I can assure you that I draw
plenty of power just playing a DVD movie.
My guess is I have a power management configuration
issue or a hardware problem. Since this has a Unix core
underneath, I started poking around in the usual places
for log files. I found the familiar /var/log and stumbled
on system.log. Looking at the file, I found something
that caught my eye.
Aug 17 01:06:19 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Doing a 'grep overtemp system.log', I got the following:
Aug 17 01:04:13 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:04:37 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:04:56 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:05:37 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:05:51 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:06:00 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:06:13 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
Aug 17 01:06:19 Jim-Fridlunds-Computer kernel[0]: Power Management received emergency overtemp signal. Going to sleep.
If you look at the time stamp, you'll see that each event
is only a few seconds apart. This matches with what
I was seeing. Machine goes to sleep. I press the power
button and it wakes up and goes back to sleep. One
big endless cycle. The only way I managed to get out
of it is to quit iTunes and to eject the CD.
Yes, I did install the Xcode 2 development kit that came
with the Mini MAC OSX setup. I eventually want to write
software for the Mac. So, I most likely installed the
CHUD tools package that you had mentioned.
I think the equivalent command line command for
disabling the nap feature is 'hwprefs -v cpu_nap=false'.
When I do that, I get the overtemp event and my mini
goes to sleep. Zzz.
In any case, my mini seems to be detecting false overtemp
condition. Either I have a bad temp sensor or my power
management overtemp threshold is set way too low. It's
possible encoding audio CDs is enough to heat up the
PPC core, but it happens way too fast. I'm thinking my
temperature sensors are not set correctly. If anyone has
schematics for the mini, it would most likely be a Dallas
temp sensor chip. I'm not ready to open up my mini yet
since it is still under warranty. I'll take it in the Apple
store in Walnut Creek this weekend.
Anyway, thank you guys for all your help. I found my
experience on this forum to be quite pleasant. People
here are very helpful.
Jim

Mac Pro unexpectedly enters sleep mode

Ok so I installed Leopard last weekend on my Mac Pro and all initially went well with the install. After installation was done, software update appeared and stated I had approximately 4 downloads to install. So I had done this and prepared to reboot. Before rebooting, a window appeared stating that it needed to update the Boot cache. So I clicked on "OK" and the computer went into its shutdown sequence. When the computer reset, I noticed there was no start up chime and the system just sat there with a black screen. I thought perhaps it was updating the boot cache and it may take a while to finish. So I went afk for about an hour and came back. Still nothing. This is when I knew there was something seriously wrong with my system.
After speaking with Apple support and trying several things to get it to boot, the support rep stated that it will need to go into the shop for repairs. I had taken it to an authorized service center and they diagnosed the problem as a bad logic board. They had replaced this and had ran their diagnostic tools on it to make sure it was running normally. They kept it overnight and ran Apple Service diagnostics in a repeating loop on the system. They had also cold booted the system 30+ times per the work order.
After I brought it home and booted it, everything was seemingly running fine. Then I received a page from work (I'm a support rep) which required me to boot into Windows using Boot Camp to solve a client's problem. After I had done this, I booted Leopard back up and was playing around in it for a few minutes to check out some of the new features. I had then ran World of Warcraft to play a bit and to check out the performance increase in Leopard. After about 5 minutes of playing, my system unexpectedly entered sleep mode. Obviously I was confused so I had brought it out of sleep mode by hitting the enter key. The system came back for about 2 seconds and immediately went back into sleep mode again. This happened about 4 or 5 times before I finally shut the system down.
The first thing I did after reboot is to check the energy saver options. Both hard drive and monitor energy options were set to "Never". I then checked for software updates. There was both an SMC firmware update and a Boot Camp EFI(?) firmware update. I had done the SMC firmware update first and then after successfully updating this, I had done the Boot Camp firmware update. After reboot, the system went into sleep mode on its own approximately 5 minutes after reboot. This time I had made sure NOT to run my game as I had a suspicion that this could be causing the problem. It entered sleep mode anyway unexpectedly. After waking it up again by hitting the enter key, the desktop appeared again for about 2 seconds before going right back into sleep mode. I called the service center again and they said I would have to bring it in for them to look at. Needless to say, I am NOT very pleased.
Has anyone ever heard of anything like this happening with a Mac Pro? I had never had any problems when I was running Tiger with any application, not even my game. The service rep where I took it said it was just bad timing that the logic board went during my OS upgrade and that the two had nothing to do with each other. My brother has a Mac Pro as well and he had upgraded to Leopard. Of course his computer works fine where mine is a sleeping fool. Does anyone have any ideas or theories as to what could be causing this? More importantly, does anyone have any suggestions on how I might be able to fix this on my own? If you could please let me know, I would appreciate it. Thank you in advance for your time.

Wow, who are you dealing with? The first time my logic board was replaced, the techs never bothered with looking at anything else as being the problem. However, when I pointed out the power supply fan problem, they focused on that being the cause of the problem and fixed just that. I was somewhat concerned as I know some of these techs do not look at other parts of the machine as potential problem causers. I was afraid that I would hook up my system only to experience the same problem as before. Luckily, that was not the case.
I am glad that your system appears to have the same problem as mine did. I would suggest that if you take it back to them again for a fan fix to have them run the system for about an hour after replacing it. They should be opening apps, checking the iStat widget, etc to try and make it break. If they can't after an hour or so, I think it should be ok.
This whole ordeal makes me question the quality of parts used by Apple. My brother has an iMac G4 where the hard drive died after 2 months of getting it new. Now this issue with mine and yours with the bad logic board and the power supply fan. Who knows how many other customers report hardware related problems?

My mac mini (2009) won't enter sleep mode

My mac mini won't enter sleep mode using the power button (previously did).
Preferences for this command have been checked - with no effect.

Try resetting the SMC
http://support.apple.com/kb/HT3964?viewlocale=en_US

User Contributed Tips, MacBook Pro (Original) Power and Batteries, MB Pro

*The following User Contributed Tips are located in the MacBook Pro (Original) > Power and Batteries on a MacBook Pro forum:*
None at this time.
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Frani wrote:
Hi Martin, thanks for your response, I'll have a good read through that article. Just to fire some more facts at you:
My superdrive has been playing up intermittently for a while. Sometime it wont read the content on CDs / DVDs - usually copied / PC & Mac written discs, not commercial ones. However I haven't been trying to read and discs when the problems have happened.
I upgraded my hard drive from a 320Gb to a 500Gb disc about 6 months ago and the switch was done by a competent Apple Authorized Service Provider. For a few weeks after the new drive had been installed there were a few occasions where the disc was making some noise, like a clicking noise. This would start and go on for a minute or so then seem to dye down and stop. It happened a total of about 10-15 times but when I reported this to the person that fitted my new hard drive he assured me he felt it was unlikely to cause a problem. he did say that if it went on to be an issue they would replace the drive of course. Like I said this was all done about 6 months ago and the clicking noises only happened a handful of times in the first month or so after the install and it did have one bad crash in this time but since then it has been fine.
I just wondered if you thought either of the above might be a cause of the issue?
Thanks
Frani,
I think the optical drive is not your problem, but it sounds like it needs replacement. There's a 75% chance it's your hard drive. Read the article on kernel panics. It takes time to diagnose the issue, but if you get TechTools and run a full diagnostic, you might find out if it's a hardware issue. But fix permissions and clean out your cache first, just in case it's a simple fix.

My MacBook Pro is crashing and Mac OS stops working sometimes so I have to restart it. And sometimes it stays on the first white-ish screen with the Apple and won't start further. What to do?

my MacBook Pro is crashing and Mac OS stops working sometimes so I have to restart it. And sometimes it stays on the first white-ish screen with the Apple and won't start further.
What to do?
Does that mean that the is the end of my Mac Book 5bought in the summer of 2009) ? Or is there someting to do to fix it?
Thanks
V

Try this:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger, Leopard or Snow Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

AirDrop doesn'n work between Macbook Pro Mid 2012 and Mac Book Air mid 2013 using both Yosemite

Can't search other devices using AirDrop between between Macbook Pro Mid 2012 and Mac Book Air mid 2013 using both Yosemite...
And trying with MBP late 2011 can't connect either

Hey aniMix,
Thanks for the question. I understand that you are experiencing issues with AirDrop. The following resource provides some troubleshooting information which may be helpful:
Mac Basics: AirDrop lets you send files from your Mac to nearby Macs and iOS devices
http://support.apple.com/kb/HT6510
Thanks,
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My macbook boots up and only stays on for 30sec and goes into sleep mode

My macbook boots up and only stays on for 30sec and goes into sleep mode! Any suggestions as to why this might be happening? Thanks....

I assume you have checked your sleep settings in System Preferences>Energy saver
I also assume this has just happened recently and spontaneously, not after installing any particular hardware or software or you would probably have mentioned it...if anything new has been added recently, obviously just remove it!
It could be the battery - have your tried it just on mains? If it's a pre unibody MacBook try it without the battery at all. This could happen if you have a non-Apple (cheap Chinese) replacement battery.
Try NVRAM, PRAM & SMC resets (Google if you don't know how)
Try booting from the install media and repairing or reinstalling OS X. (Back up first!)
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Why is there a clicking sound when I close the cover and enter sleep mode?

why is there a clicking sound when I close the cover and enter sleep mode?

Hi katesvca,
I too have an iPad smart cover, and all that clicking sound is is basically the standard lock sound for iOS. The Smart cover is equipped with magnets inside, and the iPad is also equipped with magnets, and when those magnets are closed together the iPad goes to sleep.
I hope this answers your question.

Lenovo thinkpad 8 not entering sleep mode when lid closed

RECENTLY I BOUGHT THINKPAD 8. I HAVE A PROBLEM. IT CAN'T ENTER SLEEP MODE. I CLOSE THE LID AND THE SCREEN IS ON. AT POWER OPTION IT IS SELECTED WHEN I CLOSE THE LID TO GO TO SLEEP , ON BATTERY AND WHEN PLUGED IN. THANKS FOR ANY HELP.
Solved!
Go to Solution.

I am not certain what you mean. Are you saying that when you close the cover it does not sleep? Are you certain you have a cover with the magnets that will put it to sleep?

Macbook - Unplug AC power and Mac enters sleep mode

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