IMac Freezing Issue -Need Confirmation...

Hey all,
I need confirmation on whether or not zapping the PRAM seems to stop the iMac freezing issue. I have had 3 freezes within 10 minutes. I restarted after my last preparation to installing Leopard and the screen saver kicked in, which is the 'Cosmos' slide show and the graphics froze up. Screen went black and I left it for a couple of minutes. I came back to it, and had an image on the screen, but it was still locked up. So I restarted it. After boot up, I opened Activity monitor, and locked up again.
So I zapped the PRAM on this 3rd restart and have not locked up since. I'd bet 100 to 1 that if I were to restart, without the PRAM reset, I would crash within 5 minutes of the start up.
I really believe without a doubt these iMac reboot issues are related to specific EFI versions failing to initialize graphics correctly.
Can anyone confirm this? If your iMac crashes, does Zapping the PRAM fix it?
I'll be calling Executive relations contact and telling her the bad news.
Okay, so first off, this isn't a solution to this iMac plague, but it should prevent the freezing and NO, it does not have to do with removing the ATI drivers.
I was asked to install Leopard by Executive relations at Apple and told her that, as soon as I do, my iMac will freeze. So, I have been preparing the Leopard install and have crashed 3 times, in a row... at that point I said, Leopard is going to be a no go but I needed to use my iMac without it crashing. So, zapped the PRAM like I did before and immediately the graphic freezes went away.
So

Here is my experience, iMac 24:
I bought in JR NY 2 weeks ago. I had to use it without internet connection (so no updates) and no freezes.
Then I connected to internet and installed the available updates and start to get the freezes, even trying the PRAM reset.
I tried to remove the extra memory, change memory slot but no lucky, video artifacts (like pixels not refreshing) when moving the mouse over the dock icons then freeze.
I had no other softwares installed at all, only the OS applications.
I formatted the HD and reinstalled the Tiger and didn't accepted any update, so I could use the imac for 2 days without a single freeze, but some black screens when screen saver starts.
Since no freezes, I decided to update the OS again and after the first boot the freezes came back very fast, I could start a freeze in about 10 seconds.
I tried the PRAM reset without sucess and my machine was ready to go to a tech person.
Yesterday I updated the OS to 10.4.11 and did a PRAM reset after the update and tested the machine for 2 hours without a freeze or video artifacts, looks very stable, but I have to test it more.
You guys tried the Tiger last update ?
Ulisses

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    Now they just need to figure out how to fix it.
    Here is a post from today by one of the Blizzard mac techs on the Mac Support forum of the World of Warcraft forums:
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    One is, identifying issues that need to be fixed. In this case (ATI
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    Two is, finding a way to provide short term relief of the issue if at
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    Since we can't make a driver update appear in seconds, bear with us if
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    wawalulu,
    If you can wait a few weeks for Apple and ATI to sort out the graphics driver problems, that might be your best bet. With any new model it does take Apple a couple months to iron out the glitches so when this happens, you will have a pretty solid Mac.
    I work supporting both Macs and PC's where the user base is in the thousands and I will tell you on the whole, Macs are definitely more trouble-free than PC's. However, I won't candy coat things like some of the posters on this forum. There WILL be issues that will crop up but usually Apple does the right thing and fixes them. Sending feedback and patience is the key. When the new Leopard OS (10.5) comes out this month, I guarantee there will be issues due to it's newness and lack of maturity. However, if Apple's past track record is any indication, it shouldn't have anywhere near the issues Windows Vista has. We won't even support Vista where I work because it's so troublesome!
    BTW, my 20" late 2006 iMac I use at work has been rock solid. This is because it's a revised version of the original intel iMac Apple released so most of the bugs were worked out. The G5 tower I had before that was perfect as well as the G4 and G3 towers I used before that. All of these Macs were at least second revision of their respective model lines. If memory serves, all of them has some teething pains in their first revisions.
    I have a new 20" aluminum iMac at home, breaking my cardinal rule to never buy the first revision of a new product and it does have the graphics freezing issue talked about in these threads but it's only happened twice. So, I knew full well what I was getting into and am patiently waiting for Apple to release an update and fix the issue. Why did it have to be so... darn... sexy?!
    I'll end this post on the following note: I use Macs at home precisely because I don't want to spend time fixing things... because I do that all day at work! If there was a better computer and OS out there, I'd be using it!
    Message was edited by: Martek

  • Another iMac Freezing Issue - pls help a newbie out

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    If I am streaming video (i.e Hulu on Firefox) or working in memory intensive applications (Windows, Parallels, Photoshop Elements, etc.) Problem is more frequent.
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    I have seen suggestions of resetting PRAM as well as doing a clean re-install, but also seen that those fixes haven't endured.
    I don't have Apple Care and I'm not sure what steps I should be taking to fix this. Is there hope? I mostly see lots of problems reported, but not successful resolution.
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    System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
    The interface that connects to the Internet should be dragged to the top of the list.
    If using Wifi/Airport...
    Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
    For 10.5/10.6/10.7/10.8, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
    208.67.222.222
    208.67.220.220
    (There may be better or faster DNS numbers in your area, but these should be a good test).
    Click OK.
    If that doesn't work try changing channels on your Router.

  • IMac freezes during 10.10.1 install, needs full-on Time Machine Restore.

    I failed to use Disk Utility to Verify/Repair permissions before the 10.10 -> 10.10.1 upgrade on a 27" iMac (early 2009, first 27").
    The computer restarts and partway through the grey-screen with progress bar, the iMac simply, stops.
    I eventually have to power down, and always the same stop.
    I boot into the Recovery area, where Disk Utility Repair Permissions first said the drive was un-fixable, then ran fine and made repairs and said it was fine.
    I then had to restore the entire machine from Time Machine since it WOULD NOT recover enough to boot.
    Time Machine restore was amazing.  Many hours, but it restored the iMac to the previous state from the day before, including what e-mails were open.
    I figured all the diagnostics had "shaken up" the drive enough to try 10.10.1 again, but the same result.  Partway through grey-screen with progress bar, permanent freeze.
    Needed 2nd Time Machine restore.
    Now I'm afraid to try again.
    Is that a dead sector on the hard drive?  On a system file that's never used?  So confusing.  I wish a scan could find it and mark it as unusable.
    5 year old Mac drive though.  Could be getting Tired.
    Thoughts welcome.

    I boot into the Recovery area, where Disk Utility Repair Permissions first said the drive was un-fixable, then ran fine and made repairs and said it was fine.
    To be clear, use Disk Utility's Repair Disk function, not Repair Disk Permissions. Once it finishes, back up that disk's contents to another device, preferably two or more, and then discard it. If you are concerned about securing its contents, physically destroy it first.
    A permanent repair for hard disk corruption does not exist. Firmware contained within the hard disk drive already automatically maps bad sectors "unusable" as you desire. The problem is that as a disk ages and is subject to the inevitable environmental abuse that occurs with all consumer electronics, the number of bad sectors will increase exponentially with time. Replace it.

  • New iMac freezes?

    I received my new 24" 2.8GHz iMac in early November w/4GB of Crucial memory, immediately repartitioned it, upgraded to Leopard, migrated my apps/accounts/data over from my 2.7GHz G5 Tower (which has been running Leopard perfectly), and ran Software Update to bring everything current.
    This Mac has not experienced any obvious video artifacts, or freezes while processing intensive video activity, but it is heavily customized. Here's the details:
    I've attached an Apple 23" Cinema HD Display for dual displays, a G-Tech 750GB FW800 drive for Time Machine, and a Kensington USB 2.0 powered hub to attach all my USB stuff (Harmon/Kardon SoundSticks, SanDisk memory card reader, extra Mighty Mouse, USB dock for iPhone, Canon LiDE 30 scanner, USB connection to APC Back-UPS RS 1500). I retired my old USB 1.1 hub, since I knew it would be problematic with the new system, as would be my old USB Serial Adapter.
    From a software viewpoint, I have iWork '08, iLife '08, Adobe CS3 Suite, MS Office 2004 11.3.9, Indigo 2 (home automation control software), Meteorologist, and all the other usual Apple software. At login, I have Mail, Indigo 2, iTunes, iPhoto, iCal, Address Book, Meteorologist, and Activity Monitor startup, then share iTunes and iPhoto over the local network. I also share my data volume over the local network, as this new iMac is replacing our old Windows 2003 server as a home media/data repository.
    To add to the mix, I'm also running SereneSaver Quicktime movies as Desktop backgrounds cycling every 5 minutes on both displays (although it only displays the first frame of the video on the secondary display). I was also running MacKiev's 3D Atlas Globe screen saver (displaying the latest satellite cloud cover) until I found it was locking up the new iMac in about 3 hours (with SereneSaver also running). Needless to say, this all ran perfectly on the old G5 Tower, even with its ancient ATI Radeon 9800 Pro (128MB) video card. And finally, in addition to the regular .Mac/iDisk updates, and the hourly Time Machine backups, and the quarter hour Meteorologist weather updates, and the every 5 minutes Mail updates, I was using Spaces to sort out all the windows that I wasn't hiding.
    I knew I probably brought over some conflicting software, since this was a migration from a PPC Mac to an Intel iMac, so when things froze, I assumed it was a compatibility issue, and proceeded to start trashing obviously unnecessary stuff from the system/root/user libraries. I also assured everything that was running was current. Over a couple of days I thought I had pretty much found everything I could think of that might crash the new iMac (including old Symantec frameworks, MS Virtual PPC stuff, old auto startup Retrospect stuff, and the like). I tested all my apps, reran the Leopard 10.5.1 combo update, Repaired Permissions, Verified Disk (with Disk Utility), booted up from a Tiger 10.4.11 volume and checked the Leopard startup with DiskWarrior 4.0, and then ran Apple's Hardware Test from their iMac startup DVD. In the end, I was able to keep the new iMac up and running continuously performing its assigned chores for over 37 hours.
    Then, yesterday afternoon in mid-post to one of these threads, my shiny new iMac froze up. No warnings of any kind. In mid-breath it simply stopped working. The blinking colon in the menu clock stopped, the Activity Monitor CPU history graph updating in the Dock stopping updating, neither mouse would move, pressing any combination of keys on the keyboard I could think of would not interrupt the iMac from its pause. So, I sucked it up and pressed the power button to restart.
    Upon restart, I checked the Console logs, and of course, nothing untowards was identified there. Whatever froze up the iMac happened immediately. A close Apple contact of mine immediately suggested it sounded like a hardware issue. I didn't think so, but I took his advice anyway and reinstalled Leopard in a virgin partition on the internal hard drive, along with iWork '08, iLife '08, and all the latest Apple updates, again. I did not install Adobe CS3, since its installer disk doesn't finish properly in Leopard, and I didn't want to install Tiger first, then all it's updates, then CS3, then all its updates, then Leopard again. I just want to confirm, or not, that I'm having an obscure hardware issue.
    Today I'm running the virgin installation (now 16 hours into the test) to see if I can crack the 37 hour barrier. If I make it to two full days, I'll be pretty confident that I must still be having software issues with my standard startup configuration. Of course, I'm not currently running any non-Apple software, and there's no legacy stuff on this startup partition, other than the music and photos I copied over from my data partition for sharing over the network at home. I'm also foregoing Indigo 2 controlling stuff around the house, and the great SereneSaver Quicktime movies playing soothing videos (beach scenes, peaceful lakes, mountain vistas, etc. with background sounds) as my Desktop background.
    So, if this basic, virgin configuration locks up in the next day or so, my next step is to pull the Crucial 4GB of memory and put the standard Apple 2GB back in, and wait another couple of days. If that locks up, then it's a call to AppleCare. If not, then it's a call to Crucial to replace their memory modules.
    My question is whether anyone else with a simpler configuration, and no obvious video issues (as confirmed by Software Update not offering the video firmware update), is experiencing any spontaneous freezes?
    At this point, it's still premature to think I have a hardware issue, but if I do it should manifest itself with this basic, virgin installation.
    More updates later...

    I have been experiencing a Restart/Shut Down reliability issue with my new iMac and Leopard 10.5.1. This evening an Apple rep I know pointed me to a work-around in Apple Discussions:
    http://discussions.apple.com/thread.jspa?messageID=5957261&#5957261
    This thread notes the discovery by one user that iDisk automatic syncing is not working reliably, and is preventing consistent restarting/shutting down of your Mac. Although, syncing has been working reliably for me both for .Mac stuff, and the iDisk itself, if you do a Get Info on your iDisk it reports, at least for me, that its capacity is 1TB, with 466GB available. I have only the standard 10GB .Mac account, and only 5GB of that is allocated to my iDisk, so something is clearly amiss with the .Mac iDisk setup (iDisk Get Info reports correctly on my G5 Macs w/Leopard), as being reported from the .Mac server. If you check your Console logs, you may also see this recurring error message, which is reporting a syncing error, although my syncs have, as I've said, been working correctly:
    11/25/07 9:11 PM FileSyncAgent192 MKCOL /.FileSync (FAILED), httpStatusCode:405, errorType:100, transactionState:5, txnId:3846B904-9ABB-40E5-9928-B9233FAC05D2, auto-retries=0, manual-retries=0
    To summarize, if you turn off your iDisk in your System Preferences/.Mac/iDisk preference pane, you'll have no problems restarting/shutting down. You may also need to do the power management reset (turn off Mac, unplug all devices and power for 15 seconds, reconnect, and start up) and the parameter RAM reset (reboot while holding down the cmd-opt-P-R keys). You can do this in one restart cycle, if you like. After that, restarts/shutting down has worked perfectly for me.
    Of course, I actually USE my iDisk, and will be leaving it on. But, at least I know now how to work around the restart/shut down issue. (Note: this morning my iMac running my full/standard configuration locked up, after the iDisk mounted/unmounted repeatedly during the evening, so I rebooted and switched iDisk syncing to manual. More to follow...)
    I hope Apple adds this fix to their 10.5.2 update next month.
    Note: This is such an important issue, that in addition to adding it to a reply in another Shut Down thread, I thought I'd post it as a separate topic here.

  • Snow Leopard Crash / Freezing Issue - Keyboard Dead - Hard Reboot Required

    Good morning,
    Been using Snow Leopard on a 24" 2.4Ghz iMac pretty much since the day of launch. Initially was very pleased, no real problems, seemed to run even smoother than regular Leopard, however, recently, my system has developed a bunch of issues, particularly when running word and/or transmission (possibly other apps, but I have noticed with these two so far).
    The main problem is, very randomly, the system will lock-up. This can be after 1 hour or 24 hours, there is no real correlation. After the lock up, you are able to use open apps, ie Transmission, Word, Safari, Finder, etc, but they do not function correctly...for example
    Word - You can click into documents, but any keyboard strokes are completely ignored.
    Safari - You can browse links on default start page, etc, but you cannot create new tabs or type anything into the address bar.
    Finder - You can browse folders; but you cannot perform any functions such as dragging to trash, etc.
    Also worth noting, it the main menu bar at the top of the screen continues to say either "Word" or "Transmission" etc, regardless of what application you are in. Clicking on any applications icons in the dock has no response unless they were already running.
    The system is unable to shut down or log off, and you cannot quit apps. The only option is to do a hard reset via holding down the power off button.
    Note: My system is set to never sleep. There is no screensaver.
    Any advice would be gratefully received. I'm a fairly new mac user so i'm not aware how to view log files etc., which may identify the problem.
    Many thanks in advance.

    Just want to reiterate. I am seeing freeze issues with my iMac 2.8 GHZ 4GB ram and wireless keyboard and magic mouse. Had this for two years without problem. When a freeze occurs mouse is reponsive but clicks don't give result. I am unable to open window to force quit apps. It may be related to iTunes but I can't confirm. Happening again now, even as I type this I can't open other appslike console log. I add more later.
    Jamie

  • 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

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