IMac freezing again

Hi,
My iMac has started freezing again, this time it's when I'm using iMovie. I switched it off by holding the power button and then when I turned it on again my screen had all these white lines.

Now when I try turning the computer on it freezes and does nothing, in other words, the computer won't turn on properly. I have tried the single-user mode and it says the disk is OK. What do I do?????

Similar Messages

Brand new iMac freezes constantly! Updates aren't helping!

Hello everyone,
This past Sunday I bought a brand new iMac intel Core 2 Duo with a 250 GB HDD and 1 GB of RAM. At home I set it up with my SAMSUNG 1080p 22" monitor, Apple bluetooth Keyboard and mightymouse, and a Western Digital 350 GB HDD hooked up via USB. I was excited to finally jump on the intel-based Mac bandwagon, as well as experience dual monitors for the first time.
That was Sunday. Tuesday evening I was watching "Rome" on itunes on my Samsung monitor while surfing the web with Omniweb on the iMac monitor. All of sudden, everything locked up. I was able to move my cursor, but nothing responeded to my clicking. I hard booted the system and loaded everything I had going again, and sure enough, it locked up a few moments later. I ran system update, updated everything, then restarted. Time went by and although not immediatly, later that night it froze up on me again.
Fast forward to last nite, and the freezing reached and all time high. 5 times. Each time was when I had a browser open in my iMac window and I had Quicktime playing in my Samsung monitor. I was watching a sports program, with the player fit to the screen.
I have read many posts about intel iMacs freezing late last year, but there was a firmware update that evidently fixed that. I have this update installed, and I have had no luck. I have even contacted Apple Care via phone where I got instructed to unplug everything, plug it back in, start in safe mode, and delete cache. That didn't help me out at all. Am I right insuspecting I have a faulty Video card? I just ordered 4GB of RAM, could this be a RAM issue?

When diagnostics are run on a freezing computer and nothing shows, I'll put the program into a testing loop because this means one of two things: the issue is heat related so running the diagnostics several more times will bring on the heat so that the issue shows up or the installed RAM is marginal, just flaky enough to show up now and again but not so far off that a run through of the memory test catches it on the first run.
As I said in my original post, memory is always a suspect in a freezing or kernel panicking computer. And it does tend to top my list. But from what you describe I'm not quite willing to say, "Why don't you just wait until the RAM upgrade arrives?"

My iMac freezes in Safari

Problem description:
My iMac freezes every day few times when using Safari. I have to hard reset it by holding the power button.
EtreCheck version: 2.1.8 (121)
Report generated 15 Feb 2015 20:51:02 GMT+1
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (27-inch, Late 2009) (Technical Specifications)
    iMac - model: iMac11,1
    1 2.8 GHz Intel Core i7 CPU: 4-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            4 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1067 MHz ok
        BANK 0/DIMM1
            4 GB DDR3 1067 MHz ok
        BANK 1/DIMM1
            4 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    ATI Radeon HD 4850 - VRAM: 512 MB
        iMac 2560 x 1440
System Software: ℹ️
    OS X 10.9.5 (13F34) - Time since boot: 0:8:53
Disk Information: ℹ️
    WDC WD1001FALS-40U9B0 disk1 : (1 TB)
        EFI (disk1s1) <not mounted> : 210 MB
        Data (disk1s2) /Volumes/Data : 999.35 GB (291.53 GB free)
    OWC Mercury Electra 3G SSD disk0 : (240,06 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 239.71 GB (22.61 GB free)
USB Information: ℹ️
    Razer Razer DeathAdder
    Apple Internal Memory Card Reader
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Built-in iSight
    Apple Computer, Inc. IR Receiver
Firewire Information: ℹ️
    Stanton ScratchAmp 400mbit - 400mbit max
Configuration files: ℹ️
    /etc/hosts - Count: 6
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Applications/Parallels Desktop.app
    [not loaded]    com.parallels.kext.hypervisor (10.1.1 28614 - SDK 10.7) [Click for support]
    [not loaded]    com.parallels.kext.netbridge (10.1.1 28614 - SDK 10.7) [Click for support]
    [not loaded]    com.parallels.kext.usbconnect (10.1.1 28614 - SDK 10.7) [Click for support]
    [not loaded]    com.parallels.kext.vnic (10.1.1 28614 - SDK 10.7) [Click for support]
        /Applications/Proxifier.app
    [not loaded]    com.initex.proxifier.macosx.kext (2.11.2 - SDK 10.6) [Click for support]
        /Library/Extensions
    [not loaded]    com.caiaq.driver.NIUSBHardwareDriver (2.7.0 - SDK 10.9) [Click for support]
        /System/Library/Extensions
    [loaded]    com.avira.kext.FileAccessControl (1.0.0d1 - SDK 10.9) [Click for support]
    [loaded]    com.delantis.kext.tcpblocknke (4.0.0 - SDK 10.8) [Click for support]
Problem System Launch Agents: ℹ️
    [running]    com.paragon.NTFS.notify.plist [Click for support]
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.avira.antivirus.general.agent.plist [Click for support]
    [loaded]    com.avira.antivirus.ipm.ui.plist [Click for support]
    [loaded]    com.avira.antivirus.notifications.agent.plist [Click for support]
    [loaded]    com.avira.antivirus.odscan.default.plist [Click for support]
    [loaded]    com.avira.antivirus.scheduler.agent.plist [Click for support]
    [running]    com.avira.antivirus.systray.plist [Click for support]
    [loaded]    com.avira.antivirus.telemetry.agent.plist [Click for support]
    [loaded]    com.avira.antivirus.update.default.plist [Click for support]
    [loaded]    com.paragon.updater.plist [Click for support]
    [running]    com.teamviewer.teamviewer.plist [Click for support]
    [running]    com.teamviewer.teamviewer_desktop.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [failed]    com.avira.antivirus.dbcleaner.plist [Click for support]
    [failed]    com.avira.antivirus.ipm.loader.plist [Click for support]
    [running]    com.avira.helper.watchdox.plist [Click for support]
    [loaded]    com.delantis.tcbblockd.plist [Click for support]
    [loaded]    com.delantis.tcbblocknke_load_kext.plist [Click for support]
    [loaded]    com.delantis.TCPBlock.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.paragon.ntfs12.refresh.plist [Click for support]
    [loaded]    com.teamviewer.Helper.plist [Click for support]
    [running]    com.teamviewer.teamviewer_service.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.delantis.tcpblocknotify.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [loaded]    com.valvesoftware.steamclean.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Dropbox    Application (/Applications/Dropbox.app)
    Plex Media Server    Application (/Applications/Plex Media Server.app)
    Espionage    Application (/Applications/Espionage.app)
Internet Plug-ins: ℹ️
    AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 537 - SDK 10.9
    SharePointBrowserPlugin: Version: 14.0.0 [Click for support]
    JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
Safari Extensions: ℹ️
    AdBlock
    Open in Internet Explorer
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Native Instruments USB Audio [Click for support]
    Paragon NTFS for Mac ® OS X [Click for support]
    TCPBlock [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         5%    Console
         3%    WindowServer
         2%    Safari
         1%    fontd
         0%    avguard-ondemand-mgmt
Top Processes by Memory: ℹ️
    378 MB    savapi
    326 MB    avguard.bin
    241 MB    Safari
    172 MB    com.apple.WebKit.Plugin.64
    172 MB    com.apple.IconServicesAgent
Virtual Memory Information: ℹ️
    11.00 GB    Free RAM
    4.28 GB    Active RAM
    792 MB    Inactive RAM
    1.10 GB    Wired RAM
    527 MB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Feb 15, 2015, 08:41:52 PM    Self test - passed
    Feb 13, 2015, 09:12:26 AM    /Library/Logs/DiagnosticReports/Adobe Premiere Pro CS6_2015-02-13-091226_[redacted].hang
    Feb 13, 2015, 09:12:17 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Premiere Pro CS6_2015-02-13-091217_[redacted].crash
    Feb 13, 2015, 09:09:26 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Adobe Premiere Pro CS6_2015-02-13-090926_[redacted].crash
Console log:
15/02/15 20:36:03,558 syncdefaultsd[2719]: AOSKit ERROR: XPC CLIENT: Connection [0x7f9c61456170] event handler received event with type: [XPC_TYPE_ERROR]. Description: [Connection interrupted]
15/02/15 20:36:27,164 xpcproxy[2916]: assertion failed: 13F34: xpcproxy + 3438 [D559FC96-E6B1-363A-B850-C7AC9734F210]: 0x2
15/02/15 20:36:30,000 kernel[0]: process 2917 set trusted
15/02/15 20:36:30,000 kernel[0]: Change trust on
15/02/15 20:36:30,000 kernel[0]: process name mdworker (pid 2917)
15/02/15 20:37:34,000 kernel[0]: Change trust on
15/02/15 20:37:34,000 kernel[0]: process name �� 9W��9W��9W��9W�� (pid 2859)
15/02/15 20:37:34,000 kernel[0]: revoking trust for process 2859
15/02/15 20:37:34,000 kernel[0]: Change trust on
15/02/15 20:37:34,000 kernel[0]: process name ��H ��p�IX��i�IX��b�IX��IX�� (pid 2917)
15/02/15 20:37:34,000 kernel[0]: revoking trust for process 2917
15/02/15 20:38:30,000 kernel[0]: process 2942 set trusted
15/02/15 20:38:30,000 kernel[0]: Change trust on
15/02/15 20:38:30,000 kernel[0]: process name mdworker (pid 2942)
15/02/15 20:38:45,000 kernel[0]: Change trust on
15/02/15 20:38:45,000 kernel[0]: process name (pid 2719)
15/02/15 20:38:45,000 kernel[0]: revoking trust for process 2719
15/02/15 20:39:30,000 kernel[0]: Change trust on
15/02/15 20:39:30,000 kernel[0]: process name �� MfX��MfX��MfX��MfX�� (pid 2942)
15/02/15 20:39:30,000 kernel[0]: revoking trust for process 2942
15/02/15 20:40:35,000 kernel[0]: process 2969 set trusted
15/02/15 20:40:35,000 kernel[0]: Change trust on
15/02/15 20:40:35,000 kernel[0]: process name mdworker (pid 2969)
15/02/15 20:41:51,000 bootlog[0]: BOOT_TIME 1424029311 0
Please help, this is frustrating... :-/

So, same thing happens again..
iMac freezes when I browse web with Safari, here is new console log:
18/02/15 10:20:39,000 kernel[0]: vm_page_bootstrap: 3982970 free pages and 178566 wired pages
18/02/15 10:20:39,000 kernel[0]: rooting via boot-uuid from /chosen: 65FD562A-2322-3761-B241-0F6D07DCF30F
18/02/15 10:20:39,000 kernel[0]: Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
18/02/15 10:20:39,000 kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT1@1/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/OWC Mercury Electra 3G SSD Media/IOGUIDPartitionScheme/Macintosh HD@2
18/02/15 10:20:42,435 WindowServer[122]: Display 0x04272d40: GL mask 0x1; bounds (0, 0)[2560 x 1440], 39 modes available
Main, Active, on-line, enabled, built-in, boot, Vendor 610, Model 9cb5, S/N 0, Unit 0, Rotation 0
UUID 0x7eaceae36e58dbb8a1463bb9034010b9
18/02/15 10:20:42,441 WindowServer[122]: Display 0x04272d40: GL mask 0x1; bounds (0, 0)[2560 x 1440], 39 modes available
Main, Active, on-line, enabled, built-in, boot, Vendor 610, Model 9cb5, S/N 0, Unit 0, Rotation 0
UUID 0x7eaceae36e58dbb8a1463bb9034010b9
18/02/15 10:24:42,663 mds[60]: (Normal) Volume: volume:0x7f8d13871e00 ********** Bootstrapped Creating a default store:0 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/firmwaresyncd.VZaTlM
19/02/15 15:45:24,000 bootlog[0]: BOOT_TIME 1424357124 0
EtreCheck version: 2.1.8 (121)
Report generated 19 Feb 2015 15:51:03 GMT+1
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (27-inch, Late 2009) (Technical Specifications)
    iMac - model: iMac11,1
    1 2.8 GHz Intel Core i7 CPU: 4-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            4 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1067 MHz ok
        BANK 0/DIMM1
            4 GB DDR3 1067 MHz ok
        BANK 1/DIMM1
            4 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    ATI Radeon HD 4850 - VRAM: 512 MB
        iMac 2560 x 1440
System Software: ℹ️
    OS X 10.9.5 (13F34) - Time since boot: 0:5:29
Disk Information: ℹ️
    WDC WD1001FALS-40U9B0 disk1 : (1 TB)
        EFI (disk1s1) <not mounted> : 210 MB
        Data (disk1s2) /Volumes/Data : 999.35 GB (291.53 GB free)
    OWC Mercury Electra 3G SSD disk0 : (240,06 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 239.71 GB (23.41 GB free)
USB Information: ℹ️
    Razer Razer DeathAdder
    Apple Internal Memory Card Reader
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Computer, Inc. IR Receiver
    Apple Inc. Built-in iSight
Firewire Information: ℹ️
    Stanton ScratchAmp 400mbit - 400mbit max
Configuration files: ℹ️
    /etc/hosts - Count: 6
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Applications/Parallels Desktop.app
    [not loaded]    com.parallels.kext.hypervisor (10.1.1 28614 - SDK 10.7) [Click for support]
    [not loaded]    com.parallels.kext.netbridge (10.1.1 28614 - SDK 10.7) [Click for support]
    [not loaded]    com.parallels.kext.usbconnect (10.1.1 28614 - SDK 10.7) [Click for support]
    [not loaded]    com.parallels.kext.vnic (10.1.1 28614 - SDK 10.7) [Click for support]
        /Applications/Proxifier.app
    [not loaded]    com.initex.proxifier.macosx.kext (2.11.2 - SDK 10.6) [Click for support]
        /Library/Extensions
    [not loaded]    com.caiaq.driver.NIUSBHardwareDriver (2.7.0 - SDK 10.9) [Click for support]
        /System/Library/Extensions
    [not loaded]    com.avira.kext.FileAccessControl (1.0.0d1 - SDK 10.9) [Click for support]
    [loaded]    com.delantis.kext.tcpblocknke (4.0.0 - SDK 10.8) [Click for support]
Problem System Launch Agents: ℹ️
    [running]    com.paragon.NTFS.notify.plist [Click for support]
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.paragon.updater.plist [Click for support]
    [running]    com.teamviewer.teamviewer.plist [Click for support]
    [running]    com.teamviewer.teamviewer_desktop.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.adobe.SwitchBoard.plist [Click for support]
    [loaded]    com.delantis.tcbblockd.plist [Click for support]
    [loaded]    com.delantis.tcbblocknke_load_kext.plist [Click for support]
    [loaded]    com.delantis.TCPBlock.plist [Click for support]
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
    [loaded]    com.paragon.ntfs12.refresh.plist [Click for support]
    [loaded]    com.teamviewer.Helper.plist [Click for support]
    [running]    com.teamviewer.teamviewer_service.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.delantis.tcpblocknotify.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [loaded]    com.valvesoftware.steamclean.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Dropbox    Application (/Applications/Dropbox.app)
    Plex Media Server    Application (/Applications/Plex Media Server.app)
    Espionage    Application (/Applications/Espionage.app)
Internet Plug-ins: ℹ️
    AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 537 - SDK 10.9
    SharePointBrowserPlugin: Version: 14.0.0 [Click for support]
    JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
Safari Extensions: ℹ️
    Open in Internet Explorer
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Native Instruments USB Audio [Click for support]
    Paragon NTFS for Mac ® OS X [Click for support]
    TCPBlock [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         3%    WindowServer
         2%    Safari
         1%    com.apple.WebKit.Networking
         1%    fontd
         0%    loginwindow
Top Processes by Memory: ℹ️
    189 MB    mds_stores
    189 MB    com.apple.WebKit.WebContent
    172 MB    com.apple.IconServicesAgent
    137 MB    Safari
    103 MB    Finder
Virtual Memory Information: ℹ️
    11.88 GB    Free RAM
    3.58 GB    Active RAM
    618 MB    Inactive RAM
    1.09 GB    Wired RAM
    549 MB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Feb 19, 2015, 03:45:24 PM    Self test - passed
I have disabled Safari Extensions, and didn't succeed to remove Avira's kext file, but as I said, I have experienced this freezes before I had Avira.
I don't think that is the problem.
Can anyone help me and recommend what else should I do? This thing is quite annoying. My iMac is my workplace and constant freezes are frustrating.
Thanks in advance

IMac Freezing - No video glitch, but unresponsive

Good morning all,
In the past week or so, I've started to have problems with my iMac freezing. This has occurred while using iChat, playing World of Warcraft and while using Safari (not all at once).
In short, the video display seems to freeze. I can still hear audio (ie. the other person on iChat speaking), but everything else in non-responsive. The keyboard does not respond and I cannot ALT-Tab or open any other programs. My only recourse is to manually turn off the computer and try again.
It's usually a guaranteed failure when opening up Warcraft. About 4 seconds after the program has opened, the computer freezes.
I've searched the forums and have come across several threads that involve some sort of graphical glitch, from which I do not suffer. That being said, I thought a new thread might be appropriate.
Any advice would be greatly appreciated.
Thank you,

My iMac has been repeatedly freezing when I am working in Final Cut Express. It plays the sound but freezes the video. It has been a horrible experience to try to edit 'blind'!
I have vacuumed the air vents, installed smcFan Control (great to manual adjust fan speeds on all 3 internal fans), re-installed Snow Leopard & gone through copious hours as all the software updates each time I've re-installed, and I run the disc doctor program. It started happening around the time Steve Jobs said Apple would no longer use Flash. I thought it a Flash issue since it only has to do with the playback of video. Today I discovered that clips I downloaded yesterday were also freezing in my desktop Picasa. Meaning it's not Final Cut, or Picasa, and unlikely my video card as all videos streamed from the NET (on YouTube, etc) play fine, and in fact my videos that freeze on my iMac when uploaded to YouTube or Facebook play fine.
I am enormously and thoroughly frustrated, as you can imagine. I had 15 clips from the G20 Protest March yesterday and was not able to make an adequate video to upload out of them because the video keeps freezing, and losing synch with the audio - and every time you try to play it, it freezes in a different spot!!
Horrendous problem.
Today, then, following advice in this thread, I will try re-installing back an update or so on OSX - I'm using 10.6.4, and perhaps need to go backwards?
This is an awful problem and I am surprised Apple hasn't addressed it. Perhaps it only relates to computers a few years old?
A usually very happy iMac user who is very disgruntled these days...
Brenda

24" iMac freezing occasionally/Please Help

24" iMac freezing occasionally without allowing force quit. Sometimes when I attempt to restart it, when the computer comes back on it will freeze on a gray screen with a folder in the middle with a question mark on it. If I unplug all peripherals and the iMac power cord and let it sit for a while, it starts working again Sometimes I might get 4 days of use before it happens again. Then sometimes it might happen 2 or 3 times in a day. I've always heard the gray screen with foler with question mark was the mark of death for the hard drive. If this information is true, how am I able to get it to work occasionally with no porblems?
Thanks,
34firefighter

I found out what was happening... I was running screen dimming software called 'Shades' which was messing up the colour profile allocation. I stopped this software running and I was able to recalibrate! I'm so pleased as I thought there was something wrong with my graphics card!

IMac freezing - using 10.5 with newest 24" Intel

I've read a lot of posts about iMacs freezing and they seem to be mainly with the older gen's of them.
In my case, my 24" Intel iMac freezes and the mouse will not move, the force quit won't work as the keyboard doesn't respond, nothing works, basically I just have a screen and nothing happens.
I can only force shut down and restart the computer. The same problem has happened at least once to my wife and she did the same thing except put the computer to sleep with the power button and restarted with the power button and she got a message that the mouse wasn't synced up with the bluetooth.
Can this problem have anything related to using the wireless mouse and keyboard? I also read something about issues with freezing and that it was addressed with the newest software update.
thanks for the help

Hello,
*"restarted with the power button and she got a message that the mouse wasn't synced up with the bluetooth"*
To set up a Bluetooth device to work with your computer:
Choose Apple menu > System Preferences and then click Bluetooth.
Click Add +
Choose the type of device you want to set up and follow the onscreen instructions and when you are finished restart the iMac.
If the iMac still freezes...
Try resetting the SMC, instructions here. http://support.apple.com/kb/HT1543
Try resetting the PRAM and NVRAM, instructions here. http://support.apple.com/kb/HT1379
Check the hard disk. Insert Installer disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu (Panther and earlier) or Utilities menu (Tiger and later) and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
*"Can this problem have anything related to using the wireless mouse and keyboard? I also read something about issues with freezing and that it was addressed with the newest software update"*
The most recent software update was for iTunes, so I'm not sure which software update you are referring to.
Carolyn

Imac freezes in safe mode yosemite

The power in our house was suddenly disconnected in the middle of the night and when I wanted to start my imac again it froze during the start up. I can see the apple logo and the progress indicator, but it stops at about 50%. Waited all night, nothing... Tried to start in save mode holding shift but same thing. Tried again holding shift/cmnd/v and it freezes again. Does anyone know why? See the pic.

To me that fact that it runs OK in Safe Mode would indicate that the issue is software.
Apple says;
Starting up into Safe Mode does several things:
• It forces a directory check of the startup volume.
• It loads only required kernel extensions (some of the items in /System/Library/Extensions).
• In Mac OS X 10.3.9 or earlier, Safe Mode runs only Apple-installed startup items (such items may be installed either in /Library/StartupItems or in /System/Library/StartupItems; these are different than user-selected account login items).
• It disables all fonts other than those in /System/Library/Fonts (Mac OS X 10.4 or later).
• It moves to the Trash all font caches normally stored in /Library/Caches/com.apple.ATS/(uid)/ , where (uid) is a user ID number such as 501 (Mac OS X 10.4 or later).
• It disables all startup items and login items (Mac OS X 10.4 or later).
• Mac OS X 10.5.6 or later: A Safe Boot deletes the dynamic loader shared cache at (/var/db/dyld/). A cache with issues may cause a blue screen on startup, particularly after a Software Update. Restarting normally recreates this cache.
It would seem that you need to salvage your personal files and trash everything else and start fresh by erasing the drive, writing zeros to it and then installing a fresh version of Mac OS X. Afterward carefully restore only your personal files.
Dah•veed

My iMac freezes up after the screensaver runs for a few minutes

My 30inch iMac freezes up after the screensave has been running for a few minutes. This happens about every other day. I leave my system running all the time. nothing will unfreeze things so I have to do a hard button reset. I am running all the latest system updates etc.

Reinstall Safari 5.0.6 for Leopard
Then restart your Mac, try Safari.
If it crashes again, third party plugins could still be at fault even though they do not show up in the report.
Follow the troubleshooting help here > Safari: Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues

IMac freezes with every other click

I am new to the community and hope to find help for a big problem.
I run OS Yosemite 10.10.1 on my 2010 iMac 2.93 i7 (upgraded to 12GB RAM a year ago).
For the past 5 days it gives me the colorful wheel of death almost with every second click. I cannot open a program or search a site or move a file without the iMac freezing up. Just writing these two sentences, it froze twice for about 45 seconds, which is the average, but it can take up to 2 min before the Mac responds again. I have not changed anything on my iMac knowingly in the past few weeks.
I closed every program I don't need, shut down dropbox, Google Chrome, and any program I can imagine slows down processing speed. I cleaned my desktop, made sure I have 20% space on the HD. Since I am always suspicious of the Microsoft Office programs, particularly Outlook, I logged in with a different user name that does not use these programs. Nothing helps. I used Magician, Disk Utility, Activity monitor to see if anything looks odd, but all seems normal.
I am not that Mac literate, so I just discovered the Console that seems to log error events. This is what the last 5 min look like; it tells me I had 4000 events logged yesterday. Is this normal?
Please if anyone can advise what to check, change or do to stop this nuisance that would be awesome.
Thank You!

Basic guess:
Under utilities you have to run the disk doctor to see what is wrong with either your hard drive or backup drive - stop time machine first & check the backup drive first as that is the one that may be damaged.
Hopefully someone is online now who can post the details -
Another option is to take it in for repair to apple store or authorized apple dealer (if on warrantee of any kind)

IMAC freezing, hang during startup, loud noise coming out from the speaker

I am using the iMAC i3 Intel based which i bought it just a month ago
Last week it hang, freeze just like that without me launch any application just yet
I hold the ON button for a restart, and it freeze during the startup
One more thing, sometimes when it freeze, there's a noise coming out from the speaker ( just like there is no signal from the TV )
Already sent it to the Apple Service Center but they tell me it is free from any error, but by the time i bring it back home, not even 12 hours, it freeze again just like that with loud noises coming out from the speaker.
Btw did i mention, sometimes there's also a screen distortion
Please somebody help me

I've experienced similar symptoms to the original poster's description. I have an iMac 27" 2010 model. This may be related to the following:
I've looked on numerous forums regarding the freezing problem I was having. This problem would arise on a wide range of systems.
Symptoms included but were not all always present - usually when I am loading the system with games/heavy load processes:
- Full system freeze, screen still on.
- Loud cracking noise coming from speakers (relative to what volume was at when the freeze happened).
- Computer asleep but I cannot wake up unless hard reset with power button.
- My screen backlight was also damaged (permanently dimmed) near the left side, and progressively got worse over time. This was fixed (replaced LCD 27" display $600+ and covered by my creditcard extended warranty)
Basically, what I've come to realize which has not been well documented as far as I could find relating to this problem - is that the system is overheating and causing these freezing errors (and LCD damage in my case). Prologned occurances could result in different system part failures.
How do you fix the overheating problem? Give this a try, it's worked so far for me and I've actually been able to continue video/photo editing without having this annoying freeze.
Search for and download 'iStat Pro' (widget addon that lets you monitor your system temperatures... compare it before and after the fix)
Search for and download 'SMCFanControl (a great little app that allows you to change your system fan speeds) - I did not know this was possible, and have never heard the fans go this high when it was being run automatically by the system. The fan's are obviously louder when set to max, but is well worth the system cooling results.

IMac freeze Snow Leopard 10.6.6

For the last 6 months or so I have experienced annoying "freezes" when the screen (mid session) gives me a colour e.g. dark yellow or red, and everything freezes.
Solution is system force quit and start again.
Tried all sorts of recommended fixes but nothing worked for more than a few days.
Recently (3 weeks ago) adjusted the configure of batch tasks on Main Menu - ticked ALL the boxes, leaving only Update Prebindings. Ran the program and bingo
NO MORE FREEZES Please do not ask me why as I am not a techo.
All I can say it is worth a try as it has worked 100% for my system.
Nice to have my iMac back again.

After speaking to the author of Main Menu, it appears it has some system optimization tasks that it runs that can prevent freezes. Not knowing what those are, you just played your luck chances. I would not always depend on those features to improve your system. System caches and prebindings are often voodoo in their ability to help or harm a system depending on the level of corruption in your system. Before running such a utility again, check here first to verify that's what it is needed.

IMac freezes while Time Machine updates the back up. What to do?

Ever since I upgraded to Lion my iMac freezes or nearly freezes for 5 - 10 minutes every hour while Time Machine updates the back up. What to do?
I have tried everything I can think of but its only improved from total freeze while Time Machine backs up to freeze with an occasional few seconds of activity.
I am really fed up with this.

When I first updated to Lion everything was a mess with freezes happenng constantly like every two or three minutes. Then when looking at the app store I noticed in purchased items that Lion was showing install instead of installed so I downloaded and installed again.
After this install every time Time Machine updated a backup my iMac froze for about 5 or 10 minutes while the backing up was in progress. I was getting really fed up and started this thread. Then one morning I got up and the iMac would not start up. It just sat there with the progress thingy spinning. I started in T mode to look at it from my MacBookPro and two copies of the HD appeared. Both showing zero files. I ran Disk utility on the MacBookPro to try to fix the disk. It showed 8 copies of the disk and all not reparable.
I then created a startup USB drive using my MacBookPro, used it to start up the iMac and restored everything from the previous day's backup. Since then it has been running smoothly with no freezes so maybe the answer is simply to restore a recent backup.
I am using Imation external drives and I don't believe the problem is drive specific.

I'm having log in problems and my iMac freezes

hello,
i have a 27-inch mid 2011 intel 2.7GHz core i5 imac. 6 months after purchasing it i had to take it to an apple store, it would freeze at the apple logo on startup. i was told that my hardware was ok and mountain lion was reinstalled. it ran fine for about a year then kept freezing and crashing when i logged into skype. i set up another user account and that account seemed fine. i couldnt really find any problems so i reset the mac and reinstalled mountain lion. I then had the same problem about 3 weeks ago and i knew mavericks was due for release so i decided to rest the mac again so it was fresh for mavericks.
yesterday my Imac went to sleep and when i tried to log in it kept telling me my password was wrong even though it wasnt (i did check caps lock) then it started freezing again at the apple logo. it has logged on since but in safari earlier i had alot of screen flickering. im new to OSX and really dont know whats wrong
so if anyone knows what could be worng please tell me im getting frustrated now
regards

Restore w/ micro-usb cable.

IMac Intel - After installing 10.6.5 imac freezes on startup

I installed 10.6.5 on my intel imac over the weekend and after a couple of uses my imac will no longer boot.
It gets to the gray screen with the loading spinner and after a few seconds the spinner freezes.
I've tried booting into safe mode. After the progress bar disappears the gray screen and spinner appears after a few more seconds the spinner freezes again.
I've reset the p-ram multiple times.
There is a cd in the drive which I can't remove. I tried booting into Open Firmware using Command-Option-O-F; but even that boot freezes.
Any ideas?

You can try getting the CD out by holding down the eject button while booting, if you can get the CD out then you can boot try booting from the Install Disc that came with the Mac. If you can't get is ejected you will probably need to take it in for service at an AASP.
I'm assuming you haven't been using a bootable clone like SuperDuper or Carbon Copy Cloner on an external HD. If you have then you could boot from that.
Roger

2011 iMac freezes anytime I play videos

My 2011 iMac continually freezes anytime I play videos whether it's on Netflix or iTunes. There's no problem playing videos on YouTube. I am on version 10.9.2 OS X. The videos will freeze for about five seconds (everything freezes - including the dock bar), then will unfreeze and after I'd say another five seconds, it freezes again! Does anyone have any suggestions? It's very frustrating trying to watch a movie! I also have a horizontal white line that goes straight across the video as well, which I'm guessing is probably linked to the videos freezing...?

gabevdd wrote:
i just updated my mac book pro mid 2009 to OS X 10.8.4 and my safari to 6.0.5 . Now i can't play videos in youtube. when i play videos it freezes. Please i need help!!
Did you also update Adobe Flash Player to be compatible w/your new OS?

IMac freezing again

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