Mac Turns Itself On Once A Day
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Jon Moen
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Randy Phelps
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Okay B0b!
The System Management Controller (SMC) is a chip on the logic board that controls all power functions for your computer. If your computer is experiencing any power issue, resetting the SMC may resolve it. The SMC controls several functions, including:
Telling the computer when to turn on, turn off, sleep, wake, idle, and so forth.
Handling system resets from various commands.
Controlling the fans.
To reset the SMC on an iMac (Early 2006), iMac (Mid 2006), iMac (Late 2006), or Mac mini (Early 2006):
From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
Unplug all cables from the computer, including the power cord and any display cables.
Wait at least 15 seconds.
Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
Press the power button on the back to start up your computer.
The iMac (Early 2006) and later models do not have a button on the main logic board for resetting the SMC, which eliminates the need to remove the computer's cover to reset it (as required for some earlier models).
To reset the SMC on a Mac Pro computer is:
From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
Open and remove the metallic outer door.
Press the SMC_RST switch that is located slightly below and to the right of the row of diagnostic LEDs. Use a non-metallic, non-conductive object, such as a wooden pencil. Note: Mac Pro (Early 2008) does not have an SMC_RST switch, refer to the reset procedure steps in the previous section (same as the Intel iMac and Intel Mac Mini above).
Replace the metallic outer door.
Press the power button to start up your computer.
Try this.. it should solve it.
Telling the computer when to turn on, turn off, sleep, wake, idle, and so forth.
Handling system resets from various commands.
Controlling the fans.
To reset the SMC on an iMac (Early 2006), iMac (Mid 2006), iMac (Late 2006), or Mac mini (Early 2006):
From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
Unplug all cables from the computer, including the power cord and any display cables.
Wait at least 15 seconds.
Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
Press the power button on the back to start up your computer.
The iMac (Early 2006) and later models do not have a button on the main logic board for resetting the SMC, which eliminates the need to remove the computer's cover to reset it (as required for some earlier models).
To reset the SMC on a Mac Pro computer is:
From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
Open and remove the metallic outer door.
Press the SMC_RST switch that is located slightly below and to the right of the row of diagnostic LEDs. Use a non-metallic, non-conductive object, such as a wooden pencil. Note: Mac Pro (Early 2008) does not have an SMC_RST switch, refer to the reset procedure steps in the previous section (same as the Intel iMac and Intel Mac Mini above).
Replace the metallic outer door.
Press the power button to start up your computer.
Try this.. it should solve it.
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b0b
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Here's a topic at the Apple Support Forum where people have been trying to solve it:
http://discussions.apple.com/thread.jsp ... ID=7280837
The solution involves deleting a configuration file named com.apple.AutoWake.plist. The problem is that if you use Energy Saver to turn off your computer (I turn mine off at 7 PM), this file is automatically created with no wake time. The system interprets this as "Power on at 0:00 UTC" which is 5:00 PM Pacific Daylight Time.
So, it looks like if I turn off the shutdown scheduler and then delete the file, it will fix the problem. I'll just have to manually turn off the power when I leave every day like I do with the PCs.
Or maybe I could set it to startup/wake at 6:58 PM then shut down at 7:00 PM. A bit freaky if someone's in the office, but it might work. I think I'll try that and see what happens.
http://discussions.apple.com/thread.jsp ... ID=7280837
The solution involves deleting a configuration file named com.apple.AutoWake.plist. The problem is that if you use Energy Saver to turn off your computer (I turn mine off at 7 PM), this file is automatically created with no wake time. The system interprets this as "Power on at 0:00 UTC" which is 5:00 PM Pacific Daylight Time.
So, it looks like if I turn off the shutdown scheduler and then delete the file, it will fix the problem. I'll just have to manually turn off the power when I leave every day like I do with the PCs.
Or maybe I could set it to startup/wake at 6:58 PM then shut down at 7:00 PM. A bit freaky if someone's in the office, but it might work. I think I'll try that and see what happens.
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b0b
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I just found this amazingly inventive workaround for the problem:
This sets a wakeup call for the year 2049, regardless of what you do with the Energy Saver scheduler. Since there is always a wakeup time, the bogus 0:00 UTC wakeup call never happens.
I still like my idea better. Stay tuned. We'll see if it works when 5 PM rolls around.
Code: Select all
sudo pmset schedule wakeorpoweron "03/31/49 06:00:00 GMT" "com.elgato.workaround"I still like my idea better. Stay tuned. We'll see if it works when 5 PM rolls around.
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b0b
- Posts: 29079
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