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iMac with Lion not waking after overnight sleep

Since upgrading to Lion a few days ago, my iMac (2010) won't wake up with magic keypad swipe, button press, spacebar or any other key. Works fine and wakes fine when used periodically during the day, but is locked tight upon first use in the AM. The only thing that works is a hard power off and reboot. Any thoughts? Thanks!

iMac, Mac OS X (10.7)

Posted on Jul 22, 2011 11:49 AM

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265 replies

Jan 17, 2012 9:34 AM in response to alanfromcamas

I may have found a solution.

I have tried loads and tons of methods, to fix internet, wake, BT, reboot problems, such that I have read through the posts.

Removing the power, PR reset, permission fix, mDNSResponder, Blued, remove then add BT devices etc etc. Hope I am not mistaken, but after months of trial and error I went withturning my Magic Trackpad off and not using it. Yes, I did spend money to buy it, but it seems that this may have been the problem.

Try it, maybe it helps.

My up time is about a week now, instead of hours or a day or two.

Still, Apple MUST fix this frustrating issue. :-(

Jan 22, 2012 7:21 AM in response to Rcarter236

Now I am not happy to hear this, I'm sorry. :-(

Now lets see, you must have tried unparing, turning off then reparing these gadgets, and also force quitting "blued" from utilities - activity monitor, right?

Let's see your hibarnate mode. Type into terminal:


sudo pmset -g | grep hibernatemode



See http://goo.gl/Eqoi to understand its value (intiger from 0 to 7)

Feb 4, 2012 12:43 PM in response to Rcarter236

Ok.. I have waited a few days before posting this and I may yet end up eating my words but here goes - caution to the wind..


I updated to OS X 10.7.3 when it came out a few days ago and immediately began to sleep my iMac as often as I could.. So far - after a few long sleeps and overnighters - it has woken up ok...


Could it be they have fixed this issue in 10.7.3?


I sincerely hope so..


I had given up on sleeping since about November - always powering down my machine - now its on 24/7 again...


Anyone else trying this?

Feb 6, 2012 11:17 AM in response to Techworld Services

As I described in an earlier post, I have had this problem. I have the trio of BT devices on a mid-2011 27" iMac.


I updated to 10.7.3. the other day, and yesterday worked up the courage to put this computer to sleep.


Like Techworld Services, mine woke up when I went to wake it a few hours later.


I know just one occurrence does not a conclusion make, so we'll see if it keeps up.

Feb 7, 2012 6:09 PM in response to oxocube

Hope the update fixes it. Just had a chat with apple care and the rep don't even know about this problem.


I'll add a failure mode that I noticed for this bug. It also happens for me when I disconnect stuff from the USB. It's random what device causes this (ipad, iphone android, canon 7D) and whether it happens or not it's a luck of the draw.

Feb 13, 2012 3:18 PM in response to cotak

**** and blast.

Since Feruary 6th I have been running 10.7.3 on my (late 2009) imac and sleeping regularly for several hours at a time (up to around 9 hours). But yesterday evening I put it to sleep and 24 hours later no wakeup (mouse, keyboard & trackpad locked).


I swear it is much better but Apple clearly have not fixed the problem.

Feb 13, 2012 3:38 PM in response to igs

Apple still hasn't officially recognized the issue, and therefore has not sent an update patch (including the latest .3). I gave up long ago putting my iMac to sleep. It simply isn't worth the trouble.


Unfortunately, that isn't the only sleep issue that came packaged with Lion. Other problems also still persist including not waking at for network access (for ATV), and not reconnecting to WiFi known networks. All of them affect me, and the support forums are filled with others in the same boat. Apple, however, is turning a blind eye.

Feb 15, 2012 1:49 PM in response to Georgio1

I too updated to 10.7.3 and still had the issue.


In my case it's intermittent but annoying when it happens.


I can connect a USB keyboard and mouse to login and see what's going on. What I see is the Bluetooth radio is turned off, which is why the BT devices don't work. Turning on the BT radio does nothing - it doesn't power up the BT radio.


The last time it happened, I called Apple Tech Support and the lady told me to take my 2011 iMac in for repair to get the BT card replaced. I haven't done that yet, but I hope it works.


Those of you having this trouble, trying plugging in a USB keyboard and mouse and see if the BT radio is ON.

Feb 17, 2012 3:25 AM in response to Georgio1

Same here Georgio_1


You may recall my previous posts that I upgraded to 10.7.3


All was well - iMac slept and woke up even after up to 13 hours at a time over a few weeks.. Right up in fact until yesterday morning when for some unknown reason it reverted back to its previous behaviour.

No mouse. No keyboard. No Trackpad. No Bluetooth. No Wifi. Plugged in a USB mouse and was able to shut machine down to a spinning globe then had to hit reset button.

Argh!!


So.. it is definately better but sadly not cured 100%..


Any engineers from Apple monitoring this thread???


That seems to be the consensus from other users too...

iMac with Lion not waking after overnight sleep

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