Q: Imac won't sleep af 2016-004 update

Question

cfuhr

Level 1 (8 points)

Desktops

Q: Imac won't sleep af 2016-004 update

After I yesterday applied security patch 2016-004 to my Imac ( dec 2010 model) I can't enter sleep mode. I have tried to make a safe boot ( Found a note on the net, that it fixed the problem for some) but it doesn't for me

When I try to use sleep mode - the screen goes blank as normal and my external USB disk spins off - but i sounds like the fan in the Imac does not spin down. After a few minutes it switches on the screen again

Until yesterday everything worked fine - and the security update is the only change I have made

Any ideas ?

Carsten Fuhr

Denmark

iMac, OS X Yosemite (10.10.5)

Posted on Jul 29, 2016 3:14 AM

I have this question too

Solved

cfuhr

Level 1 (8 points)

Desktops

A:

The problem is now solved - it seems that it was caused by a USB harddisk... now it sleeps like a baby

Posted on Aug 1, 2016 12:18 AM

Q: Imac won't sleep af 2016-004 update

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by Mike Sombrio,Apple recommended

Mike Sombrio Jul 29, 2016 3:18 AM in response to cfuhr
Level 6 (17,201 points)

Apple Watch

Jul 29, 2016 3:18 AM in response to cfuhr

Try resetting the SMC Reset the System Management Controller (SMC) on your Mac - Apple Support
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by cfuhr,

cfuhr Jul 30, 2016 2:27 PM in response to Mike Sombrio
Level 1 (8 points)

Desktops

Jul 30, 2016 2:27 PM in response to Mike Sombrio

Sorry for the late answer - I did not make any difference with a reset of the SMC. It's still the same - it seems to sleep around a minute, and then the screen comes on again. Have check the activity monitor - no programs are preventing sleep mode. Out of ideas !

Carsten
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by Mike Sombrio,

Mike Sombrio Jul 30, 2016 4:13 PM in response to cfuhr
Level 6 (17,201 points)

Apple Watch

Jul 30, 2016 4:13 PM in response to cfuhr
Take a look at your settings.
From the Apple menu, choose System Preferences.
From the View menu, choose Energy Saver.
Make sure "Wake for network access" isn't checked.
OS X Yosemite: If your Mac won’t go to or stay in sleep
If your Mac doesn't sleep or wake when expected - Apple Support
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by cfuhr,

cfuhr Jul 31, 2016 12:39 AM in response to Mike Sombrio
Level 1 (8 points)

Desktops

Jul 31, 2016 12:39 AM in response to Mike Sombrio

Hi
I have tried all the basics like energy settings etc - And nothing has been changed except for applying the security update

Carsten
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by Mike Sombrio,

Mike Sombrio Aug 1, 2016 2:55 AM in response to cfuhr
Level 6 (17,201 points)

Apple Watch

Aug 1, 2016 2:55 AM in response to cfuhr

As suggested in both support articles I linked to. Gald you found your problem.
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by cfuhr,

cfuhr Aug 1, 2016 12:40 PM in response to Mike Sombrio
Level 1 (8 points)

Desktops

Aug 1, 2016 12:40 PM in response to Mike Sombrio

Back to scratch... i won't go to sleep again. Not even with the usb disks pushed out, and the disks switch off. so i must be something else, that brings it out of sleep after a minute. Still strange, because nothing was changed except the security patch - any ideas ?

Carsten
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Accepted Answer · Aug 1, 2016 12:18 AM

cfuhr

Level 1 (8 points)

Desktops

Aug 1, 2016 12:18 AM in response to cfuhr

The problem is now solved - it seems that it was caused by a USB harddisk... now it sleeps like a baby

Q: Imac won't sleep af 2016-004 update

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by Mike Sombrio,Apple recommended

by cfuhr,

by Mike Sombrio,

by cfuhr,

by cfuhr,Solvedanswer

by Mike Sombrio,

by cfuhr,

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