1 2 3 4 5 Previous Next 63 Replies Latest reply: Jul 16, 2012 1:11 AM by air-ship Go to original post
  • 45. Re: iMac freezes
    LostAccount Level 1 Level 1 (80 points)

    Air-ship

     

    What model mac do you have? You can find the specs for your machine including the RAM specs here.

     

    I am anticipating a RAM issue so if needed the link might be useful.

     

    Regards

  • 46. Re: iMac freezes
    Elstrongo2 Level 1 Level 1 (0 points)

    Hi air-ship,

     

    Well, after RAM upgrade iMac still solid as a rock - 14 days and still counting!

     

    Any joy your end?

     

    Andy

  • 47. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Hi Andy,

     

    I didn't want to post anything until I was sure I could report a result.

     

    So, 8GB of RAM removed that was purchased from a major RAM supplier. A couple of Internet Plug-Ins removed (Adobe Reader etc.). I was very dubious that the plugins were causing an issue. It was a stone-dead freeze.

     

    The iMac (21.5" 3.06Ghz i3 core duo mid 2010) now has 4GB of Apple factory fit RAM and it boots from the internal hard drive. It originally booted from my external RAID 0 array.

     

    I have worked on it for a week now with no crashes at all. Brilliant!

     

    The process was very painful as I had to get it as close to Apple's required specification as possible. Now, while this was seriously disruptive, I do understand why Apple requires this. The lady who helped me should be applauded for her patience.

     

    I said from the outset that the freeze was not software related. I maintained it was hardware based. So, it turns it it was hardware related.

     

    The hardware vendor now wants me to remove all factory RAM and install each 4GB module one by one and operate the Mac. When I get some time, I will do this for them to try and identify which module is defective. But check this out: Is it the modules? Could it be the RAM slots? How far do you go to track down the issue while trying to earn a very thin crust?

     

    I've never experienced a RAM problem in 27 years of Apple Mac computing. I understand that these modules are very highly strung little beasts. It's asking a lot to cram so much RAM into such a small factor, after all, these modules are designed for laptops. The Apple extended hardware test has still not reported an error, anywhere, whatsoever. Food for thought.

     

    My confidence is slowly returning with the iMac.

     

    That's my lot for the moment and many thanks for advice offered by others here.

  • 48. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Andy, I'm back again...

     

    I received replacement RAM. It's identical to the RAM Apple supply with the iMac, even down to the sticker design. I installed it and all was well for a couple of weeks. My Mac was flying and production was fruitful.

     

    Two days ago I had another freeze, no warning at all. Then yesterday morning I had another freeze. Just before this happened my second monitor started displaying a random noise pattern (nothing to do with the monitor). This came from the video card I reckon and it had happened a few times before. Oh No! I lost two hours work and started again again. About two hours later it froze again, this time with a very loud screeching audio sound. Fortunately I only lost a little bit of work.

     

    So I removed the 2 x 4GB modules and reverted to factory standard with the installed 2 x 2GB modules. I managed to get through the rest of the day without any freezes.

     

    I've sent two Capture Data reports to Apple and will update on here when I have more news.

     

    My mates keep telling me to insist on a refund. Well I've tried this and Apple / Comet won't entertain the idea. I've been asked to take it into Comet and "prove" that the crashes are happening. I can only do this by setting up shop there and going through a standard daily workflow. What are the chances of that eh?

     

    R.

  • 49. Re: iMac freezes
    Elstrongo2 Level 1 Level 1 (0 points)

    Hey R,

     

    Apologies for not replying sooner mate. Oh dear, that screeching noise doesn't sound good at all - I assume no response from Apple yet?

     

    Things aren't overly rosy this end either I'm afraid Whilst it certainly seems to have improved matters the freezes are still happening every 2-3 days. The only thing left to do is reload the whole darn thing from scratch and If it still occurs It has to be logic board or other rather more expensive 'fix'.

     

    I think what I'll actually do is live with it until I get a new Mac and then I can reload everything on my old machine at leisure, pain in the rear but that's a BIG and time consuming task!

     

    I assume your iMac is still in warranty? If you're not so far from an Apple store I would certainly consider taking it down there and stamping your feet loudly, what's to lose?!

     

    Keep me posted on Apple's response (if any).

     

    Have a good one!

     

    Andy

  • 50. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Hey Andy,

     

    Bad news from you. I think the point that is missed by Apple is that we rely on these machines for "mission critical" activities. A dressed up term I know, but no working Mac, no working. Full Stop!

     

    As I mentioned before, the lady at Apple has been brilliant with her patient support and relentless vigour to find the fault at hand, be it software or hardware. Sadly that doesn't change the situation I'm in. I really think Apple should suspend all migration assistant aspects of OS X. That way we all know we have a fresh system. Also, would you pay for a "professional" AppleCare plan? One where you can get a swap-out if needed. Just an idea.

     

    Out of interest, can you let me know what you use on your Mac, just roughly. I'd like to compare notes.

     

    Okay so here's where I'm at. I've agreed with Apple to start swapping the RAM between banks 1 and 2 and operating the iMac. If there is no crash within 10 to 15 working days then I swap the RAM around. Incidentally, 10 to 15 working days has been the recent pattern for the freezing to rear its ugly head. I've also been requested to unhook my external time machine backup drive. I will attach it at the end or beginning of each working day and perform 1 backup (then restart if I'm backing up at the start of the day). I estimate this process will take between 3 and 5 weeks to complete. During all this I will backup to my offsite backup once a week.

     

    Last week I lost a total of 6 hours of work. Partly my fault as I was writing an article into a CMS and hadn't saved it during authoring. I do the odd bit of copywriting as well as design.

     

    Anyone else here think my warranty should be honoured and this iMac swapped out? As Paul Weller once penned: "Times are hard and life is short, but it's up to us to change in a town called Malice". A stance Apple could take and "Think Different".

     

    Okay, I'll keep in touch and I do hope your situation improves. Have you thought about switching to PC – only joking.

     

    Cheers,

    Rees.

  • 51. Re: iMac freezes
    Elstrongo2 Level 1 Level 1 (0 points)

    Hi Rees,

     

    I gotta say whilst the migration assistant is a super idea in theory and indeed practice, if there's any 'nasties' in the previous system, they'll take residence on the new one of course.

     

    Thinking about it my current system has been migrated twice now, all the way from a G3 tower » iMac G4 » iMac G5 and I suffered this self same issue on the G3 but not the G4. At the time I put it down to an overheating problem 'cause when I stuffed a desk fan into the side of it, it didn't freeze?!

     

    Anyways here we are. I'm sure you'll keep the post active with your RAM swapping antics but regards Time Machine, I've had that thought process already and only connect the TM drive if i need to, but sadly no change this end ,worth a try though. ****, I've even tried only eating with my left hand every 10 days, I've just about exhausted everything else!

     

    On a completely different note, I assume you're freelance? Do you have a website, some good may come of all this after all?!

     

    Speak soon, and good luck!

     

    Andy

    andy@twostrong.com

     

    PS You do realise, if you even mention 'switching to PC' again, we could never be friends!

  • 52. Re: iMac freezes
    Elstrongo2 Level 1 Level 1 (0 points)

    Hey Rees,

     

    Long time! Just checking in to see if you ever resolved the freezes?

     

    Mine still does does BUT after the upgrade of RAM has cut down the frequency by 10 fold! Instead of up to 3 times a day, now it's once every 1-2 weeks thank god!

     

    Anyway, hope you are good otherwise.

     

    Speak soon,

    Andy

  • 53. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Hi Andy,

     

    So my issue was definitely hardware! I removed the 2 x 2GB Apple factory RAM and moves the 2 x 4GB Mr. Memory modules into the banks where the Apple RAM had been. It's been running like a dream ever since. I've only had one black screen of death / shutdown now in almost 5 months. Mr. Memory need not have replaced the RAM after all!!! As I mentioned before, the lady at Apple was most helpful and did me a big favour and got me to clean my Mac up. Thing is though, it was still an Apple Deny All Knowledge situation. I ended up self-diagnosing the issue.

     

    During this process I almost trashed 2 x external HD's and spent literally days in downtime to fault find.

     

    Over Christmas when I shutdown for a few days I'll fit the Apple RAM again in the free banks. It will be interesting to see what happens. I could do with the extra 4GB because I often have most of CS5 plus others open at any one time. Safari or Firefox might have 15 or 20 tabs on the go which is super memory hungry.

     

    I'm please to hear that your issue is less frequent now. Sounds like there is still an underlying issue there though. Could it be the RAM ???

     

    Keep in touch.

     

    Cheers.

    Rees.

  • 54. Re: iMac freezes
    joesoto78 Level 1 Level 1 (0 points)

    you got the wrong andy im jose

    sorry bud give another shot...

  • 55. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Hi Andy,

     

    So my issue was definitely hardware! I removed the 2 x 2GB Apple factory RAM and moves the 2 x 4GB Mr. Memory modules into the banks where the Apple RAM had been. It's been running like a dream ever since. I've only had one black screen of death / shutdown now in almost 5 months. Mr. Memory need not have replaced the RAM after all!!! As I mentioned before, the lady at Apple was most helpful and did me a big favour and got me to clean my Mac up. Thing is though, it was still an Apple Deny All Knowledge situation. I ended up self-diagnosing the issue.

     

    During this process I almost trashed 2 x external HD's and spent literally days in downtime to fault find.

     

    Over Christmas when I shutdown for a few days I'll fit the Apple RAM again in the free banks. It will be interesting to see what happens. I could do with the extra 4GB because I often have most of CS5 plus others open at any one time. Safari or Firefox might have 15 or 20 tabs on the go which is super memory hungry.

     

    I'm please to hear that your issue is less frequent now. Sounds like there is still an underlying issue there though. Could it be the RAM ???

     

    Keep in touch.

     

    Cheers.

    Rees.

  • 56. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Thanks for the heads-up Jose.

  • 57. Re: iMac freezes
    Elstrongo2 Level 1 Level 1 (0 points)

    Hi Rees,

    Really glad your issues may finally be at an end! That's not to say you've had the easiest of rides!

     

    Looking back over previous posts to remember exactly what RAM I've left in, taken out, shaken all about! I haven't any Apple supplied DIMM's left in the machine - 2 x 4GB Crucial. OK the crashes are still occurring but It's definitely way more stable, almost to an acceptable level. I say 'acceptable', clearly it shouldn't happen at all, but I can get on with work at least without worrying too much about 'The FREEZE'. Having said all that, I'm writing this in a txt file and saving as I go so I can paste into post at the end, DOH!

     

    Also, my apologies, I never did list out what apps I use daily/simultaneously so here goes:

    CS5 - DW, PS, ID, Il

    Acrobat Pro 9

    All common browsers

    Parallels 5

    Mamp Pro

    Transmit 4

    Little Snitch

    Plus a whole bunch of small utilities.

     

    Not that I think that any of the above are in anyway connected with the problem but hey, you never know?!

    You say Apple got you to 'clean your Mac up'? Did you manage a complete re-install in the end then?

     

    I've had a bunch of Mac's over the years and never taken out Applecare, and never had need to! Maybe I might do it on the next big purchase - food for thought eh?

     

    All the best chap,

    Keep me posted.

     

    Andy

     

    PS Glad to hear you never crossed over to the Dark Side

  • 58. Re: iMac freezes
    Bobzeyz Level 1 Level 1 (0 points)

    This issue reared its' ugly head for me when I upgraded to Lion, and even though I re-installed SL the issue remains.  As stated, the top of the unit (27" Imac) get very warm and everything locks up (sometimes the mouse too).  I installed additional RAM, to no avail.  I allowed the computer time (1 hr) to rectify itself, to no avail.  So I began looking at software.  PS doesn't phase this machine so that was out as was all my other editing and word processing apps.  I unplugged the modem from the unit and behold,no freezes!  I saw some interesting tips concerning start with the shift key held down and it helps for awhile.  I also found the PR key solution to help for awhile as well.  But once I removed Safari from the mix, it would seem that my freezing problem has abated.  To date (2 weeks) I've had no freezes.  The other day I re-installed Safari on a lark to see what effect it would have after 2 weeks of perfect operation, and within minutes of spooling up the app, the unit froze, forcing a hard start.  I again removevd the offending app, and lo!, no freezes.  I don't know if this will help everyone, but it certainly helped my situation.  I currently run Firefox (Chrome has locked up on me once or twice) so  I humbly suggest FF.  Also, wireless encryption didn't seem to affect the freezes either.  Tried removing the 128 encryption from the wireless and no difference (except my DVD player accessed Netflix easier).  So for what it's worth, I find that no Safari seems to work.  Luck to all.  Apple, could you step up to the plate on this?  Long time user, hard core Macer.  Will NOT switch (once you go Mac, you never go back)

    rjp

  • 59. Re: iMac freezes
    air-ship Level 1 Level 1 (0 points)

    Ayup Andy.

     

    No, I point blank refused to to carry out a totally fresh install of Snow Lepoard and all my software. I couldn't afford another three days (no exaggeration) of downtime to set it all up again.

     

    I did do a fresh install of Lepoard and re-migrate from my latest backup. That was painful enough. I think I re-migrated three times in total while moving from external to internal drives.

     

    As I mentioned before, I don't blame Apple for carrying out a logical fault finding mission. However, I do point a pointy finger at them for missing the hardware issue (or not admitting it more like). I ended up at that diagnostic after the hardware test had passed with flying colours. Why was I suspicious? Well, 27 years of using Macs offers you an insight into their idiosyncrasies. I "just knew" it wasn't software.

     

    So, my summary (and sentence) is this: Apple know about a fault or issue with my line of iMacs. They won't admit it. I sort of understand this with a mainstream product at stake. Then again, I've just sent my old iPod Nano Gen.1 back on recall for a battery replacement. Confused? You will be! As we have discussed, we rely on this kit day in and out. It is our work life-blood and in Apple we trust (or did).

     

    Easy,

    Rees.