mid 2011 iMac had intermittent freezing, recent firmware fix seemed to work, now using Lion, but if bluetooth is on, iMac won't stay asleep

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mid 2011 iMac had intermittent freezing, recent firmware fix seemed to work, now using Lion, but if bluetooth is on, iMac won't stay asleep

mid 2011 iMac had intermittent freezing, recent firmware fix seemed to cure that so upgraded to Lion, then started using bluetooth trackpad (was using USB keyboard and mouse, still am but added trackpad for Lion capabilities) -- after about an hour of use of trackpad, a program froze. I was able to put iMac to sleep with the button on the back, woke it up, force quit the problem program, all well except that with bluetooth on and trackpad connected, the iMac will not stay asleep. Bluetooth now off, iMac behaving well again.

Posted on Mar 14, 2012 1:27 PM

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Answer 1

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HACKINT0SH

Level 5

5,804 points

Mar 14, 2012 3:06 PM in response to sdaniel5

Resolution

Choose Apple > System Preferences.
Click Bluetooth.
Click Advanced... in Mac OS X v10.5 or v10.6 or click the Settings tab in Mac OS X v10.4.
Deselect the "Allow Bluetooth devices to wake this computer" checkbox.
Click OK.

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Answer 2

Mar 14, 2012 6:00 PM in response to sdaniel5

Hello:

You have several problems. I seriously doubt a firmware update "fixed" the freezing issue....

The previous post would prevent the trackpad from waking the Mac - which is probably not going to address your problem

Try several things:

1. Reset PRAM

2. Reset SMC

3. Trash a preference file (com.apple.bluetooth.plist) and restart.

As I indicated, the freezing problem may be underlying all of your problems.

Barry

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Answer 3

sdaniel5 Author

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Mar 15, 2012 7:34 AM in response to HACKINT0SH

In the bluetooth advanced preferences, Allow Bluetooth divices to wake this computer -- is checked, and greyed out.

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Answer 4

sdaniel5 Author

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20 points

Mar 15, 2012 7:35 AM in response to Barry Hemphill

3. Trash a preference file (com.apple.bluetooth.plist) and restart.

There is no such file that I can find on this iMac.

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Answer 5

Mar 15, 2012 7:37 AM in response to sdaniel5

The file is located in MacintoshHD>library>preferences.

Barry

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Answer 6

sdaniel5 Author

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Mar 15, 2012 7:45 AM in response to Barry Hemphill

Thanks. I found several. One is exactly as you described. (4 KB)

The others have 'appendages': .k42jkDZ (zero bytes)

and .lockfile (zero bytes)

and zfH1aH3 (16 KB)

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Answer 7

sdaniel5 Author

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Mar 15, 2012 8:29 AM in response to Barry Hemphill

I found the com.apple.bluetooth.plist file that Barry told me to trash, trashed it, restarted, and the option about waking the computer you mentioned was no longer greyed out, so I unchecked it. We'll see. (I have had no freezes of any kind since going back to the USB and turning off bluetooth, buy the way.)

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Answer 8

Mar 15, 2012 8:35 AM in response to sdaniel5

Hello:

Your preference file was corrupted (rare, but it happens). Hopefully that will fix whatever was causing your problem. By the by, allowing a Bluetooth device to wake the computer should have no effect on your not sleeping issue. The wake has nothing to do with sleeping.

Barry

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Answer 9

HACKINT0SH

Level 5

5,804 points

Mar 15, 2012 2:00 PM in response to Barry Hemphill

Barry, some of your facts are off.

http://support.apple.com/kb/TS3402

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Answer 10

sdaniel5 Author

Level 1

20 points

Mar 15, 2012 2:21 PM in response to HACKINT0SH

Thanks for the link, Hackintosh. Seems to apply to the track pad also. If the mouse sleeps, no one else sleeps! (Nessun Dorma) Once I trashed the pref file and restarted, then followed your directions, it went very smoothly.

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Answer 11

Mar 15, 2012 2:54 PM in response to HACKINT0SH

My facts are off??? You would not recognize a fact if it bit you in the ankle.

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