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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac 27" quad i5 Random restarts


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MikesMacs

 
Member Since: Oct 10, 2010
Location: Roseville CA
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Mac Specs: 15" MBP i5 500GB 4GB, iPhone 3GS, 160GB Classic, 40GB ATV, 16GB iPad WiFi

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So when I let my iMac sit and go to sleep after 15 minutes of no use, it restarts itself then sits at the login screen. Is this caused by my settings or something else I am not aware of? If anyone has any idea please let me know. Thanks for your time.

- Mike

Everything was meant to be taken apart.
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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
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Does it happen any other time?

How is your local power? Power glitches and spikes in the line can cause that to happen. Other things that can cause the machine to randomly reboot are bad memory or a bad power supply. Since the machine is probably fairly new the likelihood of that happening is small but still possible.

Do you have an UPS to use? (uninterrupted power supply)
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MikesMacs

 
Member Since: Oct 10, 2010
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Yeah its plugged into a capacitor like powerstrip that holds a charge. I actually just realized something...

After I come back to the machine, And its at the login screen I then log in and all my applications that were open when I left it are now closed. Which led me to believe it had restarted... Then I check my uptime on iStat and it still says over a day. Is it just logging itself out and closing all applications?

I have no idea at this point.

- Mike

Everything was meant to be taken apart.
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Chef_eam

 
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Member Since: Dec 12, 2009
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Look in system preferences on the General tab of Security. There is an option to log out after a certain period of inactivity. See if that is checked.
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chscag

 
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Good point Chef. I'll bet that's what's happening.
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MikesMacs

 
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I think that was it, I unchecked that and have no had the problem since.

Another question, do you guys turn your computers off at night or let them sleep?

- Mike

Everything was meant to be taken apart.
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Raz0rEdge

 
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I usually let my iMac just go to sleep after a few hours of inactivity..so I usually leave it running for days on end without any problems..

Regards
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Chef_eam

 
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I just put mine to sleep at the end of the day. One tap on the keyboard, and I am up and running again in the morning.
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chscag

 
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I let mine sleep unless there are Texas sized thunderstorms and warnings in the area. When that happens, everything is turned off and unplugged. I learned that the hard way several years back.
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MikesMacs

 
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I have just been letting mine sleep as well. I like that a quick tap on the keyboard wakes it up within seconds.

- Mike

Everything was meant to be taken apart.
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50voltphantom

 
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I've been meaning to ask the same question. Does it make any difference as far as the life of the machine when you leave it on and let go to sleep vs. a shutdown/restart every day? I'm currently a shutdown person with my main machine. As far as my other two, it just depends how I feel that day.

Mac Specs: 20" iMac 2.4 GHz Core 2 Duo 4 GB RAM 500 GB HD OS 10.6.8 Magic Trackpad- eMac 1.42 GHz (RIP) - iMac G3 Grape 400 MHz 1GB RAM 40GB HD OS 10.4.11 iSub - iPad 2 16GB - iPod Classic 120 GB - iPod Shuffle 2nd Gen 1GB - Apple TV 2
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