New iMac freezes when awakened from display sleep

We have a new (intel) iMac and it is set so that the computer and hard drive do not sleep but the display sleeps. I have found repeatedly (like 6 times in the last 48 hours) that the thing freezes when you wake it up from display sleep. So I can be compiling stuff, the computer is alive, and then I go to wake up the display, and it goes black with the spinning beach-ball of death.
The log files are unrevealing.
Any suggestions?


Hi Bill,
   I hate it when that happens. I can't think of an aspect of simply sleeping the display that could freeze the system. Unfortunately, we don't know the details of what goes on when displays sleep. One thing that usually runs at a rather low level is a screen saver. Do you have a screen saver set to run? Maybe it's something silly like the screen saver trying to come on after the display sleeps.
   Naturally you want to run Repair Permissions if you haven't.
   I suppose the machine is freezing if there's no opportunity to get anything useful in the logs. The other thing I can think of doing is to secure shell in before the display goes to sleep and collect information about what is happening before the freeze. You might want to open several connections depending on what information you want to collect. The obvious choice is to run top, ordered by %cpu. When the machine freezes, top will probably be frozen showing the processes running at the time. You probably also want to monitor network connections with lsof. In fact, most of the things lsof monitors can freeze a machine.
   One of the connections could run a packet sniffer. Providing the sniffer writes to file frequently, you should capture the last packets before the freeze. You can send the capture file to me if you want a second opinion. If you don't get anything useful by sniffing from that machine, you might see something in a capture from a machine in promiscuous mode on the same subnet.
   To what directories, if any, does this machine bind? What network drives does it mount? Network operations are a prime suspect. Try comparable activities with the network disconnected.
   Well, that's all I can think of at the moment. Let us know what you find out.
   Shift to the left,
   Shift to the right,
   Mask in, mask out,

Brand New iMac freezes when external display connected

I'm having an issue where when I plug my Apple VGA adapter to my brand new iMac, it completely freezes. As soon as I unplug the adapter, it unfreezes. Also, if I plug in the adapter without the vga adapter, it does not freeze until I plug a vga cable

Z68A-GD55 B3 Freezes when resuming from S3 sleep

When resuming (waking up) from S3 sleep, the computer freezes after about 1 second.  I've tried * Removing all USB devices * Disabling all USB controllers via BIOS * Removing external video card and only using integrated graphics * Resetting CMOS and

Imac freezing when it goes to sleep

ever since i upgraded to mountan lion when my mac goes to sleep it freezes when i hit option command itunes mail iphoto all say not responding i have to hold power button and restartHi John, What all USB or Firewire devices do you have attached? What

Macmini 2011 on lion, goes to a blue screen om monitor when awakening from sleep mode, last 3 or 4 seconds, can anyone help? Thanks

Macmini 2011 on lion, goes to a blue screen on monitor when awakening from sleep mode, last 3 or 4 seconds, before desktop appears, can anyone help? ThanksDepending on the system configuration, this may not be unusual.  The Mini that I use for my hom

My 2011 iMac doesn't work with display sleep anymore after installing a clean copy of OSX 10.8 Mountain Lion

My 2011 iMac doesn't work with display sleep anymore after installing a clean copy of OSX 10.8 Mountain Lion. I have it on upper left corner but it take the whole computer to sleep, no way to turn just the display.Hi, thaks for response, meant to pos

MacBook Pro freezes when returning from sleep

I recently started using a Kensington Bluetooth mouse with my MacBook Pro and the computer freezes whenever I return the computer from sleep. Nothing happens when I press Command-Option-Esc. The mouse pointer moves on the screen and the dock magnific

I just got a new Imac, and downloaded files from my old PC. Now, when I go to Finder, I have 1500 files in an area called developer. What is this, and can they be deleted? There are also 78 files listed as Other!  Most of these files I do not recognize.

I just got a new IMac, and tried to download files from my old PC. When I go to,Finder, I have 1500 files under Developer, an 78 files under Other. Most of these files I do not recognize. Can they be trashed? Why did they transfer? I used a flash dri

External Display doesn't wake from display sleep

My display is set to sleep after an idle period (computer itself set to not sleep), when I return to the computer and wake the displays the external display most of the time does not "wake" or come back with picture. I need to disconnect the ada

10.6.4 complete system freeze when resuming from screensaver-VMWare Fusion

I have a Macbook Pro, 3,1. I just upgraded to 10.6.4 and noticed the following symptoms: Shortly after launching VMWare Fusion 3.1 running a Windows XP VM (from a Bootcamp partition), a series of pop up messages were complaining about a bad OpenGL dr

My iPhone freezes when disconecting from wall charger

Hi! I got an 8gb iphone for Christmas. Works great and it has the latest update that came out in January 08. I the past 2 weeks my phone freezes whenever I disconnect it from the wall charger and I have to go through the trouble of reseting pressing

Problems when waking from long sleep periods

Suddenly this morning my iMac developed a problem when recovering from a long period of sleep. I'm having trouble finding a solution. I have my iMac set to ask for password when it recovers from sleep or screen saver. When I woke my iMac this morning

Imac freezes when deleting secure trash

I have been having trouble with imac recently. freezes when using AE CS6 during rendering stage, convering videos in quicktime, emptying secrue trash, just upgraded RAM to 16GB, just upgraded OS to Mountain Lion.Hello, see how many of these you can a

Cannot wake from display sleeping freezes up

I just did a HD upgrade on my 24" imac 2.16ghz to a 1TB drive. All went well as I have done several others and I also switched from 10.4.11 to 10.5 and updated to 10.5.8 with no issues. I have a problem with it waking back up when the display goes to

IMac freezes when opening finder from Safari or other applications to import files

Hello, I have an iMac late 2013 27inch When I'm in Safari and want to upload a picture or file from the HDD, finder opens but then there is the rainbow circle and the whole Safari freezes. Same with other applications like Prezi. I don't know what to

MacBook Pro with retina display freezes when streaming from Vudu

I don't know if anyone has experienced this before. I have been trying to watch Non-Stop on Vudu tonight with a lot of issues. After streaming for a while, perhaps some 15-20 minutes or so, the video starts buffering non-stop (ha!). The problem is th

My iMac freezes when time machine is running a backup

Hi Guys, this is an iMac that had tiger and I upgraded to 10.5.8 I am using time machine with a 2TB external flex drive from seagate (brand new item) The back ups went smooth for the first few days but now my iMac totally freezes up at least once a d

Imac won't wake from deep sleep

This just started a week ago- in the morning after my Imac has been asleep for a few hours, I will try to wake it by pressing the keyboard or mouse and nothing happens- powerswitch is unresponsive, I eventually have to unplug and replug to start it u

IPhoto 11 freeze when import from SD on MacBookPro1,2

Hello there, I installed a brand new hard drive on my MacBookPro1,2 (17", Core Duo 2,16 , 2Go) with a fresh Snow Leopard install + iLife 11 Fully updated (10.6.8 + 9.1.5) , but I can't import any pictures directly from any SD card coming out of my ca

Imac freezing when shutting down

hi, i have this problem for quite a while now. it does not happen all the time but 9 times out of 10 this happens. when i shut down my imac, the screen goes blue as it should then you get the circle with the black lines going round until it shuts dow