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Can't Get iMac to Sleep With Power Button
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Administrator
Join Date: Apr 2001
Location: San Antonio TX USA
Status:
Offline
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This seems to have come from out of the blue. I typically use the power button to put my iMac (mid 2007) to sleep, but it no longer does that. Now, the first time I press the button, nothing happens. The second time, I get a "failure" tone (kind of like a "chord" sound).
I'm running El Capitan because the machine isn't supported for Sierra. I haven't made any changes except for upgrades to OnePassword. Any ideas?
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Glenn -----OTR/L, MOT, Tx
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Administrator
Join Date: Jun 2000
Location: California
Status:
Offline
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Reset the power management controller. If the system controller has become confused, it can mess up sleep and drain your battery.
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Administrator
Join Date: Apr 2001
Location: San Antonio TX USA
Status:
Offline
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Glenn -----OTR/L, MOT, Tx
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Administrator
Join Date: Jun 2000
Location: California
Status:
Offline
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SMC reset instructions. That's the official instructions.
If that doesn't fix it, I've also read from unofficial sources: unplug power for at least 15 seconds like they say. Press power button for 10 seconds and release. Then plug the power cord back in.
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Administrator
Join Date: Apr 2001
Location: San Antonio TX USA
Status:
Offline
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I realize that I haven't yet restarted the computer... I'll do that first, then see if there's a problem or if I'm just a little slow in first-line correction steps.
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Glenn -----OTR/L, MOT, Tx
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