My iMAC often freezes after waking from sleep, or occasionally freezes at random. How do I stop this?

I have 10.6.8 on my iMAC. I have been shutting down my iMAC partly because I often get freezes a few seconds after the mac wakes. The freezes also occur at random. There is seldom any way to shut down the MAC except by pulling the power cord, though very rarely I am able to finally achieve a normal shutdown. I have tried fixing permissions as well starting in Safe Mode, and while these seemed to help at first, they no longer seem to have any affect.
I thought that maybe I got some kind of virus/trojan/etc., but from what I have read here that very likely is not the case.
I have also read here that the issue could be "hardware." Does this mean things like my printer or external speaker, or external hardrive? or does it mean the hardware of the computer itself? I have read about a "Hardware Test." Does this "Apple Hardware Test" have a benefit here in figuring out the problem?
Does anyone have any suggestions? I certainly can't keep 'pulling the plug,' and I know now from these discussions that shutting down (vs. sleep) on a regular basis is not best either for the imac. (I am loathe to upgrade to LION until I get this problem resolved, though, interestingly, I seem to see that a number of LION folks have the same or similar problem.)

FussGus,
Welcome to the Apple Discussions!
What periherals, especially USB ones, do you have attached to your Mac? Does the problem persist with everything other than the Apple keyboard and mouse disconnected?
Does the problem persist if you Start Up in Safe Mode? If so, check what items are in /Library/StartupItems and /Library/PreferencePanes.
As generic advice for sleep-related issues:
For a Mac OS X with sleep problems (file names and locations are for 10.4.x):
-- trash /Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
-- trash /Users/[username]/Library/Preferences/com.apple.systemuiserver.plist
-- reboot while resetting PRAM (restaqrt while holding down command-option-p-r until you hear three sets of chimes, then release the keys)
While not directly related, since your wakes before freezing, also refer to Computer Will Not Wake From Sleep

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I suspect the problem where the USB devices are started, because I had that Bluetooth adapter plugged in at the time of the upgrade. I'm speaking of the lines in the log which start with 'USBF'. The keyboard and mouse are useless when the black screen shows up after waking from sleep.
I've tried some of the suggestions I've found for the iBook 'wake from sleep' postings on macfixit.com and here - resetting NVRAM and removing a few of the .plist files. This didn't seem to help.
I would greatly appreciate help in resolving this issue. I've been a Mac owner since the original Macintosh (it's still in my house) and am frustrated that this is the first problem I've encountered.
Thanks in advance for your help.

Thanks. In fact I had bought a new keyboard and mouse (Macally) and sure enough, if I unplug it before it reboots, the CD drive door stays closed and I can boot from a CD! I did not try any of the other stuff. Is there any way to get it to stop this? Why does a USB peripheral cause the CD to eject anyway? Would love to know!
Ron

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Freeze after waking from sleep

hi, it's been happening only in the past 3 days.
my mac pro is less than a month old.
3 gig ram, dual 2.66mhz processor, 120G hd with more of a third free disk space.
this's what happens: if the computer is in sleep mode, and if after few hours i wake it back up, it freezes.
for the first 10 seconds, the computer apparently works fine, but after that the curson stops responding, as well as all apps.
i can't quit applications, or esc...
all i can do is to powerboot it again.
i've run disk utility and verified disk and repaired permissions.
as it is now all is in check.
can you please let me know what i can do?
on my other systems i used to run Cocktail, but i haven't installed it or run on this intel machine yet, not to screw things up.
can anyone tell me what i should do for this freeze issue, and what's the best system management utility for intel machines?
thanks in advance
milly

Cocktail is not a system management utility, but rather a troubleshooting only utility. Freezes can happen waking from sleep often if there is a third party USB device connected or a PCI adapter to USB that is not familiar with Apple's Energy Saver low power mode. Before proceeding with this experiment, it is important to backup your data*:
http://www.macmaps.com/backup.html
Dismount (if a volume), and disconnect all third party USB devices and see if it freezes. If it does, make sure the hard disk is less than 85% full (an arbitrary number most have found to be safe for Mac OS X) using my http://www.macmaps.com/diskfull.html FAQ as a guide. And if it still freezes waking from sleep, repair the directory:
http://www.macmaps.com/directoryfaq.html
Cocktail, and other cache cleaning utilities should be avoided unless an obvious cache problem exists. You can use Cocktail also to delete files no other programs will delete, but only after backing up your data, to ensure you don't delete the wrong file.
* Links to my pages may give me compensation.

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Hey again.
I've read numerous reports about the sleep/waking problem but mine seems to be different. I even created a new main admin account to see if some of my preferences (I migrated my user accounts from an iMac over to the new MP) and still having the same issues.
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After that Repair Permissions.
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 DALE

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Have a late 2006 20 inch iMac
This just started happening... after a long sleep when you wake screen is either blank or frozen.
Restart does NOT help... Just have a blank screen. Sometimes a flashing question mark
The only way is to restart with a safe boot. Then it takes at least 10 minutes to come back up.
Then if you restart it's ok until it goes to sleep again.
Sometime just checking something like mail will freeze the system
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System Freeze after Waking from Sleep

Hi,
I have seen a few other posts out there with similar issues however mine is a little different. I have been noticing a few oddities since updating to Mac OS X.5, and finally X.5.1. The first challenge I noticed was that my machine does not go to sleep all of the time now, and it might be because I have a HD plugged in at night for Time Machine, but I am not sure because I seem to remember it doing this before.
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 Cheers! DALE

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Hi,
I upgraded to mountain lion a month or so ago and ever since my MBP often crashes after waking from sleep. I've included the error report below. Any help would be appreciated. After it restarts, it works fine. Problem consistently happens after waking from sleep.
Thank-you
Interval Since Last Panic Report: 55755 sec
Panics Since Last Report:          1
Anonymous UUID:                    D0E51DBB-BAAC-864E-AF93-8DAF5E934CE9
Sun Dec 2 08:24:22 2012
panic(cpu 0 caller 0xffffff7f8aabdb25): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff811e05d000 0x0a5480a2, D0, P2/4
Backtrace (CPU 0), Frame : Return Address
0xffffff80fa7bb420 : 0xffffff800a21d626
0xffffff80fa7bb490 : 0xffffff7f8aabdb25
0xffffff80fa7bb520 : 0xffffff7f8abb74b3
0xffffff80fa7bb580 : 0xffffff7f8abb7527
0xffffff80fa7bb5f0 : 0xffffff7f8aecc853
0xffffff80fa7bb730 : 0xffffff7f8abdd659
0xffffff80fa7bb760 : 0xffffff7f8aac78da
0xffffff80fa7bb810 : 0xffffff7f8aac2fac
0xffffff80fa7bba00 : 0xffffff7f8aac43a2
0xffffff80fa7bbad0 : 0xffffff7f8acb815a
0xffffff80fa7bbb00 : 0xffffff7f8ac9be1a
0xffffff80fa7bbb30 : 0xffffff7f8ac9b241
0xffffff80fa7bbba0 : 0xffffff7f8ac9b362
0xffffff80fa7bbc20 : 0xffffff7f8aca687d
0xffffff80fa7bbc50 : 0xffffff7f8acae61c
0xffffff80fa7bbdd0 : 0xffffff7f8aa5a3c7
0xffffff80fa7bbe40 : 0xffffff7f8aa4457b
0xffffff80fa7bbeb0 : 0xffffff7f8aa46c04
0xffffff80fa7bbf00 : 0xffffff7f8aa0839f
0xffffff80fa7bbf20 : 0xffffff800a649e4a
0xffffff80fa7bbf60 : 0xffffff800a23dcde
0xffffff80fa7bbfb0 : 0xffffff800a2b26b7
      Kernel Extensions in backtrace:
         com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f8a9ff000->0xffffff7f8aa36fff
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f8a829000
         com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f8aa42000->0xffffff7f8aa53fff
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f8a9ff000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f8a829000
         com.apple.NVDAResman(8.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f8aa56 000->0xffffff7f8ad58fff
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f8a829000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f8aa42000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f8a9ff000
         com.apple.nvidia.nv50hal(8.0)[9F3D09B5-3158-3D9E-BDA3-E71576AAD3B7]@0xffffff7f8 ad66000->0xffffff7f8b088fff
            dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f8aa 56000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f8a829000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12C60
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x000000000a000000
Kernel text base: 0xffffff800a200000
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 50092647901403
last loaded kext at 48562451601465: com.apple.driver.AppleUSBCDC    4.1.22 (addr 0xffffff7f8c5c0000, size 16384)
last unloaded kext at 48645674911297: com.apple.driver.AppleUSBCDC    4.1.22 (addr 0xffffff7f8c5c0000, size 12288)
loaded kexts:
com.razer.orochi.driver    2.0
com.rim.driver.BlackBerryUSBDriverInt    0.0.74
com.apple.driver.AppleHWSensor    1.9.5d0
com.apple.driver.AudioAUUC    1.60
com.apple.driver.AGPM    100.12.69
com.apple.driver.AppleHDA    2.3.1f2
com.apple.GeForce    8.0.0
com.apple.iokit.IOUserEthernet    1.0.0d1
com.apple.iokit.IOBluetoothSerialManager    4.0.9f33
com.apple.Dont_Steal_Mac_OS_X    7.0.0
com.apple.driver.ApplePolicyControl    3.2.11
com.apple.driver.ACPI_SMC_PlatformPlugin    1.0.0
com.apple.driver.AppleUpstreamUserClient    3.5.10
com.apple.driver.AppleIntelHDGraphics    8.0.0
com.apple.driver.AppleIntelHDGraphicsFB    8.0.0
com.apple.driver.AppleMikeyHIDDriver    122
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport    4.0.9f33
com.apple.driver.AppleSMCPDRC    1.0.0
com.apple.driver.AppleSMCLMU    2.0.2d0
com.apple.filesystems.autofs    3.0
com.apple.driver.AppleMikeyDriver    2.3.1f2
com.apple.driver.AppleMuxControl    3.2.11
com.apple.driver.AppleMCCSControl    1.0.33
com.apple.driver.AppleLPC    1.6.0
com.apple.driver.SMCMotionSensor    3.0.2d6
com.apple.driver.AppleUSBTCButtons    235.4
com.apple.driver.AppleUSBTCKeyboard    235.4
com.apple.driver.AppleIRController    320.15
com.apple.driver.AppleUSBCardReader    3.1.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.BootCache    34
com.apple.iokit.SCSITaskUserClient    3.5.1
com.apple.driver.XsanFilter    404
com.apple.iokit.IOAHCIBlockStorage    2.2.2
com.apple.driver.AppleFWOHCI    4.9.6
com.apple.driver.AppleUSBHub    5.2.5
com.apple.driver.AirPort.Brcm4331    602.15.22
com.apple.driver.AppleAHCIPort    2.4.1
com.apple.iokit.AppleBCM5701Ethernet    3.2.5b3
com.apple.driver.AppleUSBEHCI    5.4.0
com.apple.driver.AppleEFINVRAM    1.6.1
com.apple.driver.AppleSmartBatteryManager    161.0.0
com.apple.driver.AppleACPIButtons    1.6
com.apple.driver.AppleRTC    1.5
com.apple.driver.AppleHPET    1.7
com.apple.driver.AppleSMBIOS    1.9
com.apple.driver.AppleACPIEC    1.6
com.apple.driver.AppleAPIC    1.6
com.apple.driver.AppleIntelCPUPowerManagementClient    196.0.0
com.apple.nke.applicationfirewall    4.0.39
com.apple.security.quarantine    2
com.apple.driver.AppleIntelCPUPowerManagement    196.0.0
com.apple.driver.AppleBluetoothHIDKeyboard    165.5
com.apple.driver.IOBluetoothHIDDriver    4.0.9f33
com.apple.driver.AppleHIDKeyboard    165.5
com.apple.driver.DspFuncLib    2.3.1f2
com.apple.iokit.IOAudioFamily    1.8.9fc10
com.apple.kext.OSvKernDSPLib    1.6
com.apple.nvidia.nv50hal    8.0.0
com.apple.NVDAResman    8.0.0
com.apple.iokit.IOSurface    86.0.3
com.apple.iokit.IOSerialFamily    10.0.6
com.apple.iokit.IOBluetoothFamily    4.0.9f33
com.apple.driver.IOPlatformPluginLegacy    1.0.0
com.apple.iokit.IOFireWireIP    2.2.5
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport    4.0.9f33
com.apple.kext.triggers    1.0
com.apple.driver.AppleSMBusPCI    1.0.10d0
com.apple.driver.AppleGraphicsControl    3.2.11
com.apple.driver.AppleBacklightExpert    1.0.4
com.apple.iokit.IONDRVSupport    2.3.5
com.apple.driver.AppleSMBusController    1.0.10d0
com.apple.driver.AppleHDAController    2.3.1f2
com.apple.iokit.IOGraphicsFamily    2.3.5
com.apple.iokit.IOHDAFamily    2.3.1f2
com.apple.driver.IOPlatformPluginFamily    5.2.0d16
com.apple.driver.AppleSMC    3.1.4d2
com.apple.driver.AppleUSBMultitouch    235.7
com.apple.iokit.IOUSBHIDDriver    5.2.5
com.apple.driver.AppleUSBMergeNub    5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice    3.5.1
com.apple.iokit.IOBDStorageFamily    1.7
com.apple.iokit.IODVDStorageFamily    1.7.1
com.apple.iokit.IOCDStorageFamily    1.7.1
com.apple.iokit.IOAHCISerialATAPI    2.5.0
com.apple.iokit.IOFireWireFamily    4.5.5
com.apple.iokit.IO80211Family    500.15
com.apple.iokit.IOUSBUserClient    5.2.5
com.apple.iokit.IOAHCIFamily    2.2.1
com.apple.iokit.IOEthernetAVBController    1.0.2b1
com.apple.iokit.IONetworkingFamily    3.0
com.apple.driver.AppleEFIRuntime    1.6.1
com.apple.iokit.IOHIDFamily    1.8.0
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.sandbox    220
com.apple.kext.AppleMatch    1.0.0d1
com.apple.security.TMSafetyNet    7
com.apple.driver.DiskImages    344
com.apple.driver.AppleKeyStore    28.21
com.apple.iokit.IOUSBMassStorageClass    3.5.0
com.apple.driver.AppleUSBComposite    5.2.5
com.apple.iokit.IOSCSIBlockCommandsDevice    3.5.1
com.apple.iokit.IOStorageFamily    1.8
com.apple.iokit.IOSCSIArchitectureModelFamily    3.5.1
com.apple.iokit.IOUSBFamily    5.4.0
com.apple.driver.AppleACPIPlatform    1.6
com.apple.iokit.IOPCIFamily    2.7.2
com.apple.iokit.IOACPIFamily    1.4
com.apple.kec.corecrypto    1.0
Model: MacBookPro6,2, BootROM MBP61.0057.B0F, 2 processors, Intel Core i7, 2.66 GHz, 8 GB, SMC 1.58f16
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353237334348302D4346382020
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353237334348302D4346382020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.81.22)
Bluetooth: Version 4.0.9f33 10885, 2 service, 18 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9500420ASG, 500.11 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Razer Orochi, 0x1532, 0x0013, 0xfa140000 / 6
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 9
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0236, 0xfa120000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 3

Back up all data, then uninstall the Razer and Blackberry software according to the developers' instructions. Reboot and test. Most likely there will be no change. In that case, see below:
MacBook Pro (15-inch, Mid 2010): Intermittent black screen or loss of video

My MacBook Pro won't reconnect to my Wi-FI automatically after waking from sleep mode

Hello, everyone. Since I updated to Yosemite, my MacBook Pro won't reconnect to my Wi-FI automatically after waking from sleep mode.
Does anyone know how to fix that?
Thanks in advance,
Arthur.

Hi, arthurpacifico.
Thank you for visiting Apple Support Communities.
Here are a couple troubleshooting steps that I would recommend trying to see if it corrects this issue.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Reset your computer’s PRAM
http://support.apple.com/kb/HT1379
If the issue persists, try the troubleshooting steps I have attached below.
Symptom: After restarting or waking from sleep, my computer might not connect to the Internet
After waking from sleep or starting up, your computer may not show that it is connected to a Wi-Fi network.
After start or wake, your computer may indicate that it is connected to a network, but does not connect to the Internet.
Solution
Use these steps if your computer does not automatically connect to your desired Wi-Fi network.
Check your TCP/IP settings in the Network pane of the System Preferences. Click the "Renew DHCP lease" button
Choose System Preferences from the Apple menu.
Choose Network from the View menu.
Select Wi-Fi, then click the Advanced button in the lower-left hand corner of the screen.
Click the TCP/IP tab from the top of the screen.
Click the "Renew DHCP lease" button.
Select the Wi-Fi tab and view your Preferred Networks list.
Select each network and click the minus sign to remove those networks from your Preferred Networks list.
Click OK and close the Network preferences.
Remove your stored network passwords using the Keychain Access Utility.Restart your computer.
Open Keychain Access from /Applications/Utilities. Your window will look like this:
Remove your AirPort network passwords from the login keychain: Select the "login" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
Remove your AirPort network passwords from the System keychain: Select the "System" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
Note: The above steps will remove your Wi-Fi network passwords. If you do not know them, or if your network does not use passwords to restrict access, you should contact your network administrator.
Join your Wi-Fi network. You will need to enter your password for your network again if it requires one.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/ht4628
Cheers,
Jason H.

Apps are switched after waking from sleep

When I close the lid, my MacBook Air goes to sleep, and when I open the lid again, it wakes from sleep. But it also switches apps after waking from sleep. Is there anything I can do to prevent this from happening?
This has been discussed earlier, but the proposed solution (changing System Preferences > Security & Privacy > General > Require Password x minutes after sleep) only fixed it temporarily. The symptom reappeared after a short while (after the first restart, I think, but I'm not sure).
I noticed that the problem does not appear in a new user. It only appears in a user account I moved and upgraded across a couple of Macs and OS X updates. Is there anything I can do short of creating a new user account?

FWIW, I never sleep my machines or their HDs, just their displays and never have an issue waking up the displays, usually run 24/7. Give that a shot.

After waking from sleep, my iMac (Lion) is unresponsive. The mouse moves, but when I click things it won't open them.

After waking from sleep, my iMac (Lion) is unresponsive. The mouse moves, but when I click things it won't open them.
This has happened EVERY time the iMac goes to sleep for the last few days.. the only way I have found to resolve the issue is to manually restart the computer each time via the button on the back of the iMac.
Any and all help is appreciated!
Thanks

FWIW, I never sleep my machines or their HDs, just their displays and never have an issue waking up the displays, usually run 24/7. Give that a shot.

My iMAC often freezes after waking from sleep, or occasionally freezes at random. How do I stop this?

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