IMac swtichng off

I bought aniMac...my first Mac..because I was sick of MS updates on the PC breaking things. Unfortunately I'm now beginning to wish I hadn't bothered. The Mac has switched itself off without any warning about 10 times now.

Ok my iMac 7,1 20" 2.0 is a few years old and it has not given me a bit of trouble - LOVE IT. I moved to Australia a year ago and have been using a plug converter without a step down transformer for 240v to 110v. It has been shutting down unexpectedly and when I push the power button it comes right back on with the screen that was there when it shut down. Is it likely the 240v is causing the issue by overheating or what might be the other reasons? Any ideas much appreciated
You don't need a step down transformer, all Macs are designed to run from 100V-240. However if you have been using a plug converter you might want to make a trip to an Apple Store and pick up the correct power cord. That being said I don't believe that is where the problem is. Do you recall what you were doing on the computer when it shut down?
Other things to consider have there been any changes such as hardware changes, new software, etc.. you can think of?
Also please let us know how much RAM it has, the size of the HD and how much space is available on the HD. To find out how much available HD space you have select the HD's icon in a Finder window, then click Command - I and you will find that information you need. I'd also like to get an idea how much Free RAM it has under normal use. You can find this out by opening Activity Monitor (Applications - Utilities - Activity Monitor), click the System Memory Tab towards the bottom of the window - then let us know:
Free
Wired
Active
Inactive
Used
Misti btw I know you're new so let me offer a little Internet etiquette. What you're doing is called Thread Jacking (trying to take over someone else's thread), this is considered pretty rude which I'm sure wasn't your intent. Going forward please create your own thread.

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When streaming a movie from an imac to apple tv, is there a way of putting the imac display off? I find it a waste having the screen on in another room. Any advice?

When streaming a movie from an imac to apple tv, is there a way of putting the imac display off? I find it a waste having the screen on in another room. Any advice?

No problem.
This is a user forum so you are not addressing Apple. There's nothing to fix, that's how home-sharing works. There would be no way for the ATV to recognize your library and display content if the computer is in sleep mode.
You can always airplay from an IOS device or use icloud if you don't wish to keep the computer on.

IMac turns off by it self and does not want to turns on later, do i have to feel the fan at the back?

1.- The imac turned off by it self.
2.- I tried to turned on pressing the turn on/off button and it did not do anything.
3.- I disconected the computer form the wall and wait for some minutes, and it did no do anything.
4.- After about 20 minutes i tried again and turned on by pessing the on and off button.
5.- The imac turned off again and disconected form the wall and conected to another electrical contact at the wall, adn it did not turned on. i wait for some minutes and turned on again, but after about five minutes it turned off again.
6.- I left the imac connected to the wall for a couple hours and i tried to turned onn by pessing the on/off button and it did not turned on.
7.- I left all night connected form the wall and tried to turn it on this morning and it did not turn on.
8.- This time, I only disconnected the imac cord form the back of the computer and left it for a couple of hours, then I concected and turned on
9.- All the times that the computer turned on it started like a restart and no announce or windows appear telling me about an error or something like that.
10.- One of the times I touched the computer at the back and felt it hot, not too hot, but I do not how normal is.
11.- I can feel some very, very little air at the back form the vent.
What do I hve to do?
What kind of tests can I do to know if the computer's an is working ok?

Contact Apple Service, iMac Service or Apple's Express Lane. Do note that if you have AppleCare's protection plan and you're within 50 miles (80 KM) of an Apple repair station, you're eligible for onsite repair since yours is a desktop machine.

Why is my iMac dropping off as shared volume- Back-to-My-Mac

I have a 21.5" iMac 2.5GHz mid 2011, 12GB ram running Lion 10.7.4.
It is connected via ethernet to a gen 5 Airport Extreme, so Airport on the iMac is off. I am also running a MBP .
Both are on iCloud Back-to-My-Mac. When the iMac is awake, it shows up on the MBP as a shared volume. After it goes to sleep, it disappears as a shared volume. Wake for network activity is checked on the iMac. Sometimes it takes a little bit of time, but it always drops off after it goes to sleep.
I don't remember having this problem before. The only thing I have changed is that I had been using a 1st gen Airport Extreme and upgraded to this 5th gen.
I've checked everything I can think of but the problem persists.
Anyone have any thoughts as to why the iMac keeps disappearing?

I have a 21.5" iMac 2.5GHz mid 2011, 12GB ram running Lion 10.7.4.
It is connected via ethernet to a gen 5 Airport Extreme, so Airport on the iMac is off. I am also running a MBP .
Both are on iCloud Back-to-My-Mac. When the iMac is awake, it shows up on the MBP as a shared volume. After it goes to sleep, it disappears as a shared volume. Wake for network activity is checked on the iMac. Sometimes it takes a little bit of time, but it always drops off after it goes to sleep.
I don't remember having this problem before. The only thing I have changed is that I had been using a 1st gen Airport Extreme and upgraded to this 5th gen.
I've checked everything I can think of but the problem persists.
Anyone have any thoughts as to why the iMac keeps disappearing?

The air port on my imac went off and i can not get it to work

my air port on the imac weny off and i can not get it to work now

Apple used to use airport name for everything.. is this the internal wireless card?? Or external airport router?
If it is the internal wireless card, is it still listed in system profile.. and do a hardware test with your original CD.
See http://support.apple.com/kb/ht1509
The problems with Mavericks are very great.. if you upgrade installed anything can happen.. a common feature is the internal wireless card fails to work.
Give details and we can figure it out.
Here is discussion about the same thing as I think has happened to your imac in macbook.
https://discussions.apple.com/thread/5219345?tstart=30

Powering off firewire ports when imac is off!

hello,
i was wondering, is there a command line or something else to configure the firewire ports on my imac so that when my imac is turned off, power doesn't continue flowing to my firewire 800 hard drive as well as my firewire 400 audio interface??? thanks

24” iMac 2.8 GHz Intel Core 2 Duo OSX v10.5.5 shutdown anomaly.
It appears that the iMac does not truly shut down, the Firewire 400 port cycles on so that a hard drive attached to the port will turn on.
I took readings with a digital ammeter/powermeter attached to the iMac power cord.
The reading with the computer shut off read 5ma (0 watts on the wattmeter) cycling to 180ma (5 watts) for 1 second duration. This cycle repeats 23-24 times a minute. Unfortunately, this is enough to activate my One Touch Maxtor 500GB hard drive attached to the Firewire port. The readings with the iMac in the sleep mode were the same, so it seems shutting the computer down at night really doesn’t save any electricity. Attaching the Maxtor to the USB port does not turn on the hard drive when the computer is shut down.
I have seen other support group threads complaining about Firewire drives turning on when the computer is in shut down mode and the cause is generally accepted to be an active Firewire port.
Since my Maxtor doesn’t have an on/off switch, the best solution I have found so far is to use my APC 750 UPS to turn off the Maxtor. This APC has a master plug outlet that senses when the computer is turned on and activates 3 other outlets to on when the computer reaches a certain power threshold. Fortunately the threshold is user adjustable and I was able to set it high enough to turn off the Maxtor outlet when the iMac is off. This really doesn't solve the problem, I guess Apple will have to fix that, but it is a work around to all those HD lights.
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Mike

IMAC SHUTS OFF WHILE PLAYING ITUNES

My IMac shuts off (like the plug was pulled) while playing ITunes and after the computer has been on for several hours. I am running OSX10.5.8. Any suggestions? My fan would not quit running a few weeks ago and I used the Program "clean my pc" and that corrected the problem or at least I thought it did. The fan does not audible run (loudly) any longer.

Shutting down like that MIGHT be a sign of overheating.
Suggest that you download XRG http://www.gauchosoft.com/Products/XRG/ which monitors your computer's processor temperature and hard disk temperature, and also shows fan speeds.
Run XRG and watch what it does as you run iTunes leading up to the moment that your Mac shuts down. See if the temperatures are increasing, and if they are, the fans should also increase. If the fans don't run as well when the temperature rises, then they might be broken and can be repaired (typically).

Imac Shutting OFF unexpectingly...

I recently posted on here with a problem of my Imac turning on by itself...Im now having a problem of it shutting down on its own. Ill be in the middle of working on something and BOOM my computer shuts down with now warning. Any ideas on what this could be.
I read on another forum that the power button may be slightly misaligned. Please leave me something if you have any ideas. Its getting very frustrating.

here is the article on Apple.com
article # 301733
iMac G5 (Ambient Light Sensor), iMac G5 (iSight): How to Reset the SMU
The SMU (System Management Unit) is a microcontroller chip on the logic board that controls all power functions for your computer. If your computer is experiencing any power issue, resetting the SMU may resolve it. The SMU controls several functions, including:
Telling the computer when to turn on, turn off, sleep, wake, idle, and so on.
Handling system resets from various commands.
Controlling the fans.
Note that resetting the SMU does not reset the PRAM. Resetting the SMU will not resolve issues in which your computer is unresponsive—in these situations, restarting your computer will generally suffice. If your computer isn't responding, perform these steps one at a time, in this order, until the issue has been resolved:
Force Quit (Option-Command-Escape).
Restart (Control-Command-Power).
Force Shut Down (press the power button for 10 seconds).
Resetting the SMU can resolve some computer issues such as not starting up, not displaying video, sleep issues, fan noise issues, and so on. If your computer still exhibits these types of issues even after you've restarted the computer, try resetting the SMU. To reset the SMU on one of these iMacs:
Turn off the computer by choosing Shut Down from the Apple menu, or by holding the power button until the computer turns off.
Unplug all cables from the computer, including the power cord.
Wait 10 seconds.
Plug in the power cord while simultaneously pressing and holding the power button on the back of the computer.
Let go of the power button.
Press the power button once more to start up your iMac.
Unlike earlier iMac G5 computer models, the iMac G5 (Ambient Light Sensor) and iMac G5 (iSight) computers do not have a button on the main logic board for resetting the SMU. This eliminates the need to remove the computer's back cover to reset the SMU.

Can I use time capsule as an NAS devise with sonos, to play music library when iMac is off?

can I use time capsule as an NAS devise with sonos, to play music library when iMac is off?

Apparently Sonos system can play from the library without needing iTunes running.
In that case yes, the library can be played directly from TC.
See https://discussions.apple.com/message/18562619#18562619
Sonos needs fully compliant SMB file system.. this is important.. and not what the Apple system is using to access the TC.
Moving the library has to be done correctly.
See http://support.apple.com/kb/ht4527
There are plenty of discussions in forums and technical sites.. this seems well worth a read.
http://arstechnica.com/apple/2012/12/how-to-offload-your-itunes-library-to-a-nas /
TC is very non-ideal itunes library location.. unlike a real NAS.
Just so you are aware. If you have TM backups on it.. mixing backups and data is not a good idea.
At least consider moving backups to USB drive. You will need the speed of the TC internal drive for using the library though.
TC has no way to back itself up.
TC is slow to start.. you will get errors as the library is not found.
And quick to spin down drives.. it is not designed to stream media.. it is a backup target for TM.

IMac powers off during DVD playback, why?

Right now, since the last update and my Applestore repair, by iMac powers off everytime I watch a DVD. Doesn't matter which player, I've tried Front Row, DVD Player, VLC, and Realplayer. It will play for 30seconds - 5minutes, and then power off. No error message.
My drive completely failed a few weeks ago, so I brought it to the Apple Store. They held it hostage for over a week and replaced the drive, the drive cable, and the "smart board" or whatever they called it. Upon return the drive works as expected... except this issue.
I run my business from my Mac so I want to make sure there isn't a simple way to fix this before I go back into the Apple Store (1 hour away).
Any ideas??
-Garrett

Hi, cannot tell you why..call AppleHelp (USA 1-800-275-2273)....L

When I click sleep, Imac turns off not just sleep

When I click sleep, Imac turns off not just sleep. Any fix?

Hi Hank,
Some things to try...
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/ht1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...
http://support.apple.com/kb/HT3964
(SMC reset= Shut down, disconnect power cord for 10 seconds, reconnect power cord, wait 5 more seconds, turn computer back on)
but it is slightly different: (PMU REST = Shut computer down, disconnect power cord for 10+ seconds, reconnect power cord WHILE SIMULTANEOOUSLY PRESSING POWER BUTTON, let off power button for a few seconds, then press power button again to restart the mac mini.)
Can also be caused by USB or Firewire devices.

IMac turns off spontaneously during start up

My iMac turns off during startup any suggestions as to why?

Try running Apple Hardware Test on your computer. Also repair the hard drive with disk utility.

IMac turned off suddenly, won't boot from hard drive/CD drive

Hi guys.
Here is what I have:
27" iMac with:
Core i5 2.7
4GB RAM
Mountain Lion
Win7 on Bootcamp
Lion is installed, but I have the Snow Leopard install disc.
The system had just been recently reformatted so there wasn't really much on the computer itself other than an update to Mountain Lion and a Win7 install via Bootcamp. Other than that, nothing was recentlly installed.
What happenes is I was browsing and all of a sudden it completely shut down. No warning, nothing. Completely shuts down.
Okay.. weird... but when I try to load Mac back up, the Apple logo appears and then after a while of supposedly loading, the screen goes to a plain white screen until I force the computer off. Something similar happens when tryin gto boot into Windows: I get to the "Starting Windows" screen but after that everything goes black and I have to shut down manually.
Great. Now I'll just go into recovery and fix all of this right? Wrong. Can't boot into recovery either. Similar end result: white screen.
Last thing I tried is reinstall OS X Snow Leopard. After loading for about 1-2 minutes, the usual white screen appears after trying to boot from the disc.
I am at a loss. I don't think its the hard drive, because the problem occurs even when trying to boot from the disc. My suspicion is the RAM has gone bad. But, before I go the hardware route, is there any suggestions or recommendations anyone could make first?
In advance, I really appreciate anyone who replies and tries to help.
Thanks.

Xmotox,
I had the EXACT problem today. EXACT. Discs wouldn't boot, I did get the application disc to run the AHT but it said all was fine.
I called my buddy who said something about unplugging for a minute then holding power button while plugging the power supply back in. I thought it would be futile since we already did all the SMC reset procedures to no avail, PRAM reset didn't do anything, etc, etc... But what do you know, up pops the disc utility and my iMac is now restoring from time machine. It's not done yet, so I can't say it worked... BUT it's the farthest we got tonight. Could not get disc utility up via CMD-R or OPTION keys... but powering down, unplugging for a minute or so, then holding power button while plugging the power supply back in did the trick. Hope this helps!

Is there a way to turn the new iMac screen off while running a song?

I know the key command is shift control eject-- and it works-- but only for a few seconds. Does anybody know how to turn the screen off so that it will stay off for any serious period of time?
I used to do this in my g5 by just turning the monitor off. great to trick to ensure that i'm listening to a mix w/ my ears--- not my eyes.
thank you

Thank you for all the responses.
I've tried the black cloth. it's okay-- but i wind up have to attach something to the iMac--- and my clients are very sensitive to the things look here. i think it's petty-- but whatever. Also-- i have to constantly be taking it on/off as i make ajustments.
As far as turning around goes-- this is okay. I've tried it. the thing is-- your the way your ears receive sound-- is significantly different when you turn around. not drastically-- but again-- i'm talking about slight adjustments anyhow. any little difference can throw things off.
And the idea of a screen saver-- well-- here's the thing: when i'm trying to think only of music-- i don't even want to have to look at a computer screen. Imagine if you owned a nice pioneer 1970's stereo receiver and killer set of speakers. But everytime you were listening to it-- you had to look at a some sort of computer image. just not that pleasant.
comfort is pretty important to me at this point and that's kind of the whole goal. to still sit where i sit, look where i look, but not have to see a lit display on a computer screen.
i will try the hot corner thing.
thank you all for your responses.

IMac turns off after it turns on

Quick question on what might be a problem with an iMac G3 350Mhz. I hit the power button, the green light comes on, the hard drive starts to spin, about 1 second, everything shuts off. Can't really figure out where I might start (Power supply, bad Power Switch). Works the same if I hit the power button on the front of the unit or on the keyboard.
Any suggestions?

I'm no whiz at this, but I have a suggestion: back-up any data you don't want to lose or you may be paying for a transfer sometime soon onto a new computer. Recently, my iMac G3, bought in 2000 and on its second HD, "popped" with a flash of light from the base when I turned it on. After that, my screen would appear an electric green color and then would shut down within a second, just like yours did. Turned out that my analog board blew and it would cost over $400-$500 to get it replaced. With a six year-old computer's potentially escalating problems at stake, I decided to buy a brand-spanking new iMac 5,2. Hated to spend all that $$$, but I'm enjoying it, especially since I got DSL, too!
If your problem is fixed with the PRAM battery, good for you; but still, back up your data.
iMac5,2 (17 inch monitor) Mac OS X (10.4.7) Previous computer: iMac G3 w/o Firewire. Analog board blew after 6 years.
iMac5,2 (17 inch monitor) Mac OS X (10.4.7) Previous computer: iMac G3 w/o Firewire. Analog board blew after 6 years.

IMac swtichng off

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