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37782 Views 163 Replies Latest reply: May 23, 2009 7:12 PM by Nic T
Currently Being ModeratedApr 29, 2009 2:47 PM (in response to thefreshh20)Picked up my iMac 3.06Ghz with the ATI card on Saturday and it worked for 15mins before freezing. The funny thing is after reading some of the other discussions in this thread I have realised it started to play up as soon as i turned on airport. The screen started to flicker and then i got hundreds of small squares all over the screen about half an inch apart. Even after switching off and starting again all i got was a grey and white striped screen followed by a blue one that remained (no OS). The shop referred to it as DOA!! I spoke to Applecare and they didn't have a fix and told me to take it back to the shop. They are giving me a replacement but with the nvidia card instead so hopefully that will be more stable. Not happy though as i really wanted the top spec oneMac Mini, iMac, MacBook, iPhone, Mac OS X (10.5.6), media centre pc
Currently Being ModeratedApr 30, 2009 9:51 AM (in response to Nic T)I still have no solution or a computer that will work without freezing. Personally I'm $2500 into my iMac. In my opinion they need to get my imac fixed fast. I don't know bout you guys but when I spend 2500 I expect to get what I payed for. It SHOCKS me to hear how many people are having problems, and how many are willing to keep it even with the problems. I mean if I buy a car, and it breaks down on the way to work, I wont keep it. I got a computer that wont compute, that doesn't work for me. 3 or more freezes a day is a lemon product for computers.
I'm still a sour apple.3.06GHz ATI 4850 Wireless keyboard mouse, Mac OS X (10.5.6), none
Currently Being ModeratedApr 30, 2009 10:19 AM (in response to NotLovingMac)There are just as many if not more people that aren't having the problem. Your $2500 isn't going anywhere but in the mac you have now or a replacement one. Hold tight is my advice.IMAC 24'' 3.06 ATI HD 4850 PowerBook G4 1.66 BLPP, Mac OS X (10.5.6)
Currently Being ModeratedMay 1, 2009 11:03 AM (in response to Jreaton)I've tried the turning off the WiFi and using Ethernet work around. So far, it seems to be working. Played WoW at max settings for a few hours, recorded in game video and edited it in FCE. iMac has been on for over 24 hours with no crash.
So, my own empirical evidence says that the problem seems to be a driver conflict with the 4850 and the AirPort Extreme card. I'll do more testing tonight watching HD video from Hulu and NetFlix when I get home from work.iMac 24", 3.06 dual core, 4 GB RAM, 1 TB HDD, Radeon 4850, Mac OS X (10.5.6)
Currently Being ModeratedMay 1, 2009 3:10 PM (in response to unclethursday)I just received my replacement iMac 2.93 w/ ATI 4850 today. So for this Canadian, that means that I placed my order on March 3rd, and am just now starting to play with a machine that may work... right now Time Machine is doing its thing to backup my system - and after that's complete, I'll start stress testing it to see if this one freezes.
What are the opinions - is it better to stress test it now to see if it freezes, or go light on the machine until Apple posts a fix? I'm not very happy about speed regulating my fancy new Mac...Early 2009 iMac 2.93Ghz, ATI 4850, 4GB RAM, 640 GB HDD, Mac OS X (10.5.6)
Currently Being ModeratedMay 1, 2009 4:29 PM (in response to Martin Spencer)Turn off Airport, connect ethernet and enjoy. Go ahead and stress it out. It's a fantastic machine and I am sure Apple will get the kinks worked out. It took a couple of days for the freezes to start but since I turned off Airport I haven't had a single freeze. There is no way they are getting this one back.24" iMac/2.93GHz/ATI 4850, Mac OS X (10.5.6)
Currently Being ModeratedMay 1, 2009 4:48 PM (in response to smile dr)FWIW, I've been having the same problem since accepting delivery and setting my iMac up last week. First thought it was Firefox because initially it only froze while watching video online - one particularly annoying time during a webcast for Wolfram Alpha.
Finally did a search in the forums and found this thread - what a relief that was since misery truly loves company. Unfortunately my home network doesn't allow for direct ethernet hookup easily so I'll suffer through till a fix is posted.
As requested by many on this forum, I did log the issue with Apple Support here in Canada (used the callback feature and Kevin called at the precise time - nice). After checking with a Level 2, he did confirm it was a known issue that Apple is taking seriously and working on. His final request to me was to check if the clock still works when it next freezes and to post my results using my case number, which I will do.
Thanks to all of you for posting your trials, tribulations and successes on these forums.
...john...2009 Early 24" iMac 3.06GHz/4GB/1TB/ATI 4850 & 2007 15" MBP/3GB/ATI-X1600, Mac OS X (10.5.6), 23" Cinema/AirportExtreme
Currently Being ModeratedMay 2, 2009 11:32 AM (in response to McJPP)Over 48 hours with the iMac on since turning off the AirPort and going Ethernet. Not even a hiccup suggesting it might crash. I've played games at max settings, recorded in game movies, watched HD videos, edited HD videos and more to try and work the iMac to the point where it definitely would have crashed when the AirPort was on before.
So, anyone who can hook up through Ethernet until Apple fixes the driver/firmware conflict, it seems to eliminate the crashes.iMac 24", 3.06 dual core, 4 GB RAM, 1 TB HDD, Radeon 4850, Mac OS X (10.5.6)
Currently Being ModeratedMay 2, 2009 11:39 AM (in response to Nic T)Has anyone tried the new Mac EFI Firmware Update 1.4 yet?
IvanMac Pro Quad 3.0, Mac OS X (10.5.5), PM G4 GE Mac OS 9.2.1
Currently Being ModeratedMay 2, 2009 12:14 PM (in response to ivan54)Yup, done deal, firmware update is the fix. Just posted.
"This update fixes intermittent system freeze issues for iMac computers with ATI Radeon HD 4850 graphics and fixes wake-from-sleep issues in Boot Camp."
Do software update or go to http://support.apple.com/downloads/iMac_EFI_Firmware_Update_14
That really didn't take very long. Thank you Apple, good job!iMac 24", 3.06GHz, 1T, 8GB, ATI 4850, Mac OS X (10.5.6), MacBook Air 1.86 SSD, iPhones, iPods, 20" G5 iMac...
Currently Being ModeratedMay 2, 2009 2:34 PM (in response to ivan54)I just did a good hour and a half test (Ran iTunes Visualizer Full Screen, which always worked before) on WiFi and didn't have a single freeze, hiccup, complaint at all.
Good job Apple!
Currently Being ModeratedMay 2, 2009 3:07 PM (in response to Jim Kohn)Has anyone run any performance tests to determine if the core or memory clock speed was adjusted to remedy this?MBP 2.2, Mac OS X (10.4.10)
Currently Being ModeratedMay 2, 2009 4:20 PM (in response to John Capra)http://forums.macrumors.com/showthread.php?t=695261&page=2 reply no.36 - did some xbench before and after. Doesn't look like anything's been changed.iMac 2.93 Intel Core Duo, Mac OS X (10.5.6), 4Gb RAM, ATi 4850 graphics
Currently Being ModeratedMay 2, 2009 4:38 PM (in response to Richard Osmond)This is great... thank goodness for these forums; I just applied the update on my 1-day old replacement iMac that I've been running with a wired Ethernet connection to avoid freezing.
The cable is now put away - back to WiFi, and hopefully no freezing!Early 2009 iMac 2.93Ghz, ATI 4850, 4GB RAM, 640 GB HDD, Mac OS X (10.5.6)
Currently Being ModeratedMay 2, 2009 4:50 PM (in response to Martin Spencer)Over at the macrumors forums, it would appear that this update has indeed fixed everyone's issues, without any degradation in benchhmark tests.
Yes!Early 2009 iMac 2.93Ghz, ATI 4850, 4GB RAM, 640 GB HDD, Mac OS X (10.5.6)