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Freezing iMacs

53872 Views 694 Replies Latest reply: Nov 4, 2007 3:10 PM by FrustratedWithVista RSS
  • phr Calculating status...
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    Nov 3, 2007 12:21 AM (in response to MacMoses)
    MacMoses wrote:
    The solution is not the updates 1.2 or 1.3, as they have 0 effect for the true freezing that is plaguing the iMac aluminum's.


    According to the Apple engineering it is. I got the following answer today:

    "Engineering believes this issue has been addressed in the "iMacUpdate 1.2" which is available as of today, via Software Update."

    The problem with artifacts and freezing on the iMacs is in fact video memory which requires an entire logic board (motherboard) replacement at your nearest Apple Store (repair center).


    What makes you believe so? How comes that some machines do work perfectly before 1.1, but not so afterwards? Why is my iMac running smooth since 1.1, but not before? So no, I don't think it is a HW issue.
    iMac Core 2 Duo 24", Mac OS X (10.4.10)
  • samt14 Level 1 Level 1 (10 points)
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    Nov 3, 2007 12:36 AM (in response to rpduval)
    Hey guys, just wanted to say, i had no problems with tiger 1.0. I have many many freezes with 1.1 Tiger and Leopard without software upgrade Plus i did zap PRAM many times, didn't help. Upgraded to 1.3 still had freezes, but flashed PRAM again AFTER 1.3 upgrade and had no freezes, have played hardcore games, ran itunes visualizer, dock method, arabeque, iphoto scrolling 2000 pictures. ALL those caused crashes even in 1.3 but none after 1.3 then flash PRAM. Good luck
    Imac 20 inch, Mac OS X (10.4.10)
  • Mawe Budweg Calculating status...
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    Nov 3, 2007 12:42 AM (in response to phr)
    My 20 imac has the freeze problem too.
    When the imac arrived 31 of August it worked fine until the 1.1 update. Then i had a freeze from time to time. it worsened until the computer was almost unusable.
    Leopard didn´t help. the software update 1.3 didn´t help either. I tried almost everything, reinstall, reset pram, etc... So, since apple seems to be unable to fix this problem... I cant help me but I get the feeling that the hardware has a problem...
    I complained two months ago for the first time at apple support and every time i´ve called they never heard of this problem before. I cant really believe that an no comment on the official supportpages. Luckily this page exists... so i know im not alone.
    At the moment im really....
    By the way even if hate to admit that...bootcamp with windows vista works fine and not had a single freeze on the same computer...... APPLE DO SOMETHING...FAST
    imac 20, Mac OS X (10.5)
  • mystictheurge Calculating status...
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    Nov 3, 2007 1:00 AM (in response to phr)
    phr wrote:
    MacMoses wrote:
    The solution is not the updates 1.2 or 1.3, as they have 0 effect for the true freezing that is plaguing the iMac aluminum's.


    According to the Apple engineering it is. I got the following answer today:

    "Engineering believes this issue has been addressed in the "iMacUpdate 1.2" which is available as of today, via Software Update."

    The problem with artifacts and freezing on the iMacs is in fact video memory which requires an entire logic board (motherboard) replacement at your nearest Apple Store (repair center).


    What makes you believe so? How comes that some machines do work perfectly before 1.1, but not so afterwards? Why is my iMac running smooth since 1.1, but not before? So no, I don't think it is a HW issue.


    Yeah I agree with phr on this one. I highly doubt that the hardware is defective in the machine. Pretty much all indications of the failure point to a software bug. First, I don't think apple/ati could possibly let THAT many faulty computers out of quality control, judging by how widespread the problem is, second, people report that running xp/vista as the primary OS with other ati drivers seems to work flawlessly, third, the problem apparently isn't specfic to Mac OSX either, I've read on other forums that new ATI drivers have had similar problems, and lastly the *ASIC hang log* messages indicates that something is probably wrong with the firmware on the card, not the actual card itself.

    Anyway, 2 more hours on 1.2 and tiger and no freezes, I've now completed rather thourogh testing of at least 35 various applications and no freezing....
    iMac 2.4ghz Core 2 Duo 20"
  • Al Van Malsen Level 6 Level 6 (18,740 points)
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    Nov 3, 2007 4:05 AM (in response to MacMoses)
    I agree with you MacMoses.

    I thought it was software but after countless reinstalls and every other software fix that a user can do I finally called Apple and they are going to replace the motherboard. Unfortunately, for me, the 1.2 update (I am still using Tiger) actually made my Mac a bit more unstable than before.

    I think, based on my discussions with certain people at Apple that if the software updates do not solve the problem, then it is a hardware issue and you may as well call Apple and see about getting the motherboard replaced.

    Be very careful when you call and tell them everything you have done to try and solve the problem. If they ask you to do things you have not done then do them. You never know, one of the things they ask you to try may work. You will have to exhaust all software issues before they will consider it a hardware issue. Be patient and don't lose your temper and act like you know everything. don't bet them up about the "thousands of people having this problem" becasue they may or may not know how widespread it is. These folks take hundreds of calls and the freeze may only represent a small portion of the calls that tech has recieved in the last few days, so to them it may not be widespread you just don't know. Anyway, based on my information this problem is not as widespread as many would like you to believe but affectw somewhere between 1-2% of the Macs being sold. It has been difficult for the engineers as it is a combination issue of hardware and software and there appears to be little rhyme or reason to it. There is no "bad batch" of video cards although something is wrong with some of them. It may not be a video card as such but a controller chip for that card. It appears to be software for some as the updated have fixed the issue for them. It is also an intermmitent problem which makes it even harder to diagnose. In most cased there is nothing written in the log files to guide you to the source of the problem which makes it even harder for the engineers to solve as they can't reference those logs to help give them a clue as to where to look for a solution.

    Apple is actually sending someone to my house to fix this and where I live, in the middle of nowhere, that is a heck of an offer for them to make. the nearest service technician is at least 45 miles away from me. I am very pleased with that level of service as it is not part of the standard warranty package and I do not have Applecare. I will be buying it though after I am certain that my Mac is running the way it should.

    Years and years of dealing with Apple and they have never failed to do the right thing by me. I am happy and impressed with the level of service I am receiving in an attempt to resolve this problem.
    24"imac 2.4Gz, 17"iMac core duo, 20" G5 iMac, 20" Intel iMac, Mac OS X (10.4.8)
  • paulmarchand Calculating status...
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    Nov 3, 2007 6:36 AM (in response to autiger)
    Hi around,

    i experienced several freezings on my new iMac 24" (no options). I thought that the last update fixed this issue, but sadly it didn't. It freezed in frontrow, itunes..

    I tried to call the apple store today but saturday it is closed, so i ve to wait until monday. I think they will tell me to send it to repair, BUT no way i don't want them to open my still very new machine. Do you think they can accept to send me a NEW one, freshly built in china ?

    I ve it since October 4th.

    I'm desperate
    Thanks to all
    Mac OS X (10.5)
  • Marc Poirier Calculating status...
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    Nov 3, 2007 7:25 AM (in response to paulmarchand)
    That's not the way it works unfortunately... you're past your 14 days, they won't just sent out a new machine, as we read in other threads, they have procedures to follow before they give you a new one, which eventually, if they can't fix, they'll replace...I don't have it with me but check what they offer in their 90 days warranty.. You're still under you 90 days, see if they can pick it up or come to your place instead of you bringing it in.. They'll probably go through a series of software tests before they tell you they need to take it in for mouth to mouth resurrection

    Don't despair!!! we're with you!!!
    Silver IMac, 24", 2.8ghz Extreme, 2g RAM, 500g HD, Mac OS X (10.4.10), Laptop powerbook G4 1,67ghz, 1g ram, 17"
  • dsmcclin Calculating status...
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    Nov 3, 2007 9:19 AM (in response to Marc Poirier)
    Quick question - has anyone with massive freezing prior to the v1.2 or 1.3 update who has had the update fix their problem tried it in bootcamp with windows (vista preferable or xp with games)? My iMac (brought in for repair day of last software update) was having problems in both Leopard and Vista (Leopard much worse than Vista, but both bad and unusable). This last software update was just drivers, not firmware, right? I would think that it's still a problem if it crashes frequently in windows but not in Mac OS.

    ps- I have to use windows for work, so don't yell at me about that - that is why I love the intel macs - best of both worlds (plus win xp on MBP is FAST!!).
    iMAC, Mac OS X (10.5), Aluminum iMac 2.8GHz 4GB RAM 750GB HD
  • MacBookC2D123 Calculating status...
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    Nov 3, 2007 9:39 AM (in response to dsmcclin)
    Yes. I had freezes in 1.1 and 1.2 in XP although less than in OSX. I swapped my 2G stick of RAM with another (it passed the memory test in Techtool and works perfectly well in another 2.4 iMac) and I have no further freezes in either OSX or XP. Go figure...

    PS Good Luck to all the people still having freezing. My best to you all...
    iMac 2.4, Mac OS X (10.4.10)
  • misterbrain Calculating status...
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    Nov 3, 2007 9:45 AM (in response to dsmcclin)
    I hardly had problems using windows vista. Just 2 black screens and one bluescreen during playing bioshock.

    Until update 1.3 I hardly could use my iMac with Tiger or Leopard (Leopard was worst).
    After update 1.3 Leopard became much more stable. Vista continued running stable except minor problems with the bluetooth apple keyboard.

    Since 1.3 I just had 2 freezes using Leopard (both freezes occured when opening time-machine).

    Even working with logic studio using au-instruments that are using huge amounts of memory (DFH-Superior Drums that allone uses up to 1.2GB RAM) no problems or freezes.

    But I don't think, that 1.3 solved the problems with the iMac's entirely.
    Alu iMac 24" Intel Core 2 Extreme; 750GB HD; 4 GB RAM, Mac OS X (10.5)
  • Apple Bud Calculating status...
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    Nov 3, 2007 9:57 AM (in response to paulmarchand)
    I also have a new 24" iMac with Leopard and all of the updates installed, and I'm experiencing freezes. My last freeze was when using Safari - no other apps were open.
    iMac 24", Mac OS X (10.5)
  • ickter Calculating status...
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    Nov 3, 2007 9:58 AM (in response to paulmarchand)
    I too will be calling for action on Monday. I'm so sick of dealing with this issue. I've had my machine since Aug 31 and will not be happy if ALREADY some stranger (who cares not for me or my machine) has to crack it open.

    You my friend should be even more upset. The issue recognized during your 14 day return period. You could have returned it but instead Apple told you to stand pat and wait like a SUCKER for your 14 days to lapse. If most iMacs work then so should ours. Plain and simple. Apple has had enough time to look into this. No more waiting!

    Background: I've been dealing with these freezes too since update 1.1. Now with Leopard is freezes with regularity both before and after 1.3. I've been through the PRAM resetting, clean installs, everything. Bought Leopard, now problem is even more regular. Cover Flow and Preview regularly freeze the machine. Watching movie clips often yields artifacts and sometimes even black screen.
    iMac 2.8GHz, Mac OS X (10.5), 4GB/750GB
  • pavelbure Level 1 Level 1 (35 points)
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    Nov 3, 2007 10:24 AM (in response to autiger)
    i think that's about all we can do at this point is call up and tell them we want our machines fixed. if i can just get my imovie 06 problem fixed i will be somewhat happier. i also want the freezes to stop. hopefully my parts will be in by the end of the week and i can continue using a otherwise beautiful machine.
    imac, Mac OS X (10.4.10)
  • KMACR Calculating status...
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    Nov 3, 2007 10:40 AM (in response to ickter)
    The issue is really wearing us down. I find I alternate between hopeful optimism and dark pessimism with each new potential "fix" and failure. I brought my iMac home again today from the Apple repair center to try to get some project work done over the weekend (still awaiting delivery of a new logic board from Apple ordered last week). The tech had loaded update 1.2 (tiger) plus the Aperture update and had no freezes as he worked with it in Aperture off and on for a couple of days. So, until the part arrives, I've brought it home to try to make the best of the situation.

    However, immediately after getting home with it again, I started it up, opened Aperture---and it froze in mid-application opening. Spinning beachball cursor for several minutes. Finally I did the usual manual restart with the power button (which I think I must be surely wearing out by now---may wind up needing to replace that before all is said and done). I opened Aperture again and it seems to be working better but I will be saving every third keystroke once again until the logic board arrives and I put it back in Apple repair.

    I can give it but one more chance to redeem itself with the hardware repair then I'll be forced to politely demand that Apple replace it with a working iMac. Number of days owned: 47. Number of days with screen freezes (at 4-18/day): 44 (I'm crediting the tech's word that it did not freeze on him for two days after the update).

    My business suffers and this iMac was to be used as a photo-management tool plus a book/photography presentation unit for a lecture series in front of live audiences---I can't afford to have it constantly freeze, affecting the show. In light of all the working iMacs out there I feel I must just have received a bad one. I hope Apple understands the gravity of the situation. Perhaps the logic board, once it arrives, will fix the problem...I can only wait...some more...and see. I know Apple is working hard on trying to resolve the issue. They can only be too aware of the saying, "one bad apple..."
    iMac 24" 2.4GHz Aluminum, Mac OS X (10.4.10), 3GB RAM 320GB HD ATI Radeon HD 2600 PRO 256MB memory
  • mystictheurge Level 1 Level 1 (5 points)
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    Nov 3, 2007 11:26 AM (in response to pavelbure)
    Ick, now I'm worried my "fixed" iMac has potential to start acting up on me again now, especially after I update to leopard....

    Just out of curiosity, there are "stable" aluminium imacs, right?

    I'd really hate to end up with a lemon computer....
    iMac 2.4ghz Core 2 Duo 20"
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