Apple Quietly Releases Fix for Flickering on 24-Inch LED Cinema Display over Thunderbolt

Discussion in ' News Discussion' started by MacRumors, Sep 28, 2011.

  1. macrumors bot


    Apr 12, 2001

    Ever since Apple released its first Thunderbolt-equipped machines earlier this year, reports have been surfacing from a number of users complaining about flickering issues on company's 24-inch LED Apple Cinema Display when used with the new Thunderbolt-equipped machines.


    Apple has apparently quietly released a firmware fix for the issue, although the update has not been publicly announced and its existence appears to have only been revealed to a small number of customers who have escalated their issues through Apple's support systems.

    A link (.dmg download) to the firmware update was posted to Apple's discussion forums earlier today, and a number of users who have applied the update have reported at least initial success with addressing the flickering issues. Users report having to reboot their systems and power cycle their displays in order for the displays to function properly after applying the update.

    From the description included in the download file:
    Full instructions for installing the firmware update are also included in the documentation.

    It is unclear why Apple has yet to publicly issue the firmware update for all 24-inch Apple Cinema Display users, and thus users should exercise caution in deciding whether to apply the update and prefer to check with Apple support regarding their specific issues.

    Apple introduced the 24-inch LED Cinema Display in October 2008 and officially discontinued the model in July 2010 when Apple consolidated its display offerings with the 27-inch LED Cinema Display as its sole offering. Apple did, however, continue to sell off its remaining stock of 24-inch displays for a number of weeks after the official discontinuation.

    Article Link: Apple Quietly Releases Fix for Flickering on 24-Inch LED Cinema Display over Thunderbolt
  2. macrumors member


    Jun 2, 2006
    Jakarta, Indonesia
    Apple only care about their new product. What about MacBook Pro late 2008 flickering issue on nvidia 9400M? It's been 3 years, and still no fix.
  3. macrumors 68040

    Bubba Satori

    Feb 15, 2008
    You're holding it wrong.
    Don't buy any of that Dell junk.
  4. macrumors 68000


    Mar 5, 2009
    Do you have AppleCare? I took mine in for a loose hinge and they ended up replacing my whole screen assembly cause they noticed it was flickering. Not sure if it got to the root of the problem but the screen no longer flickers.
  5. macrumors newbie

    Sep 28, 2011
    It's about time

    I had this problem for quite some time, i hope it will be a permanent fix.
  6. Greg McBride, Sep 28, 2011
    Last edited: Sep 28, 2011

    macrumors member

    Greg McBride

    Jun 22, 2007
    MBA Question

    I have a new 13" MacBook Air and the power connector is on the opposite side of the Thunderbolt connector. Does the cable on the Thunderbolt display reach both sides of the MBA? In the pics, it doesn't look like it does. Just curious if anyone knows.

    Ignore this post. Just found the answer. Apparently it does work. (I figured it would. Apple wouldn't overlook something like that.
  7. macrumors 6502a

    NY Guitarist

    Mar 21, 2011
    I have this exact same problem. And apparently so do many others out there too. Just do a search.
  8. macrumors 65816

    Mar 10, 2005
    Maybe fix the flickering on the brand new thunderbolt display, too? I have one hooked up to a 27" iMac and the random flickering always catches me off guard while working. Really, $1000 for a monitor and it acts this way?
  9. macrumors G5


    Nov 14, 2007
    1 Geostationary Tower Plaza
    I had the problem. Just go to Apple and complain. I got my screen fixed.
  10. macrumors member

    May 28, 2008
    I thought this would never come.

    Always a pleasant surprise when Apple releases an update for a long discontinued product. I have spent hours researching this issue over the past few years. Display always flickered on my MacPro w/ATI Graphics, but Never flickered on my Wife's 2010 MBP with NVidia graphics. Flickered horribly on my 2011 MBP (15", 2.3 i7). Applied the update just now, no flickering so far!

    Very happy about this!
  11. macrumors 65816


    Sep 30, 2009
    Is it possible to have a design flaw that no firmware can totally solve?
  12. Moderator emeritus


    Jun 15, 2000
    For this specific issue of the 24" and Thunderbolt Macs, I doubt it. They worked perfectly fine with the previous generation Macs.

    I had this problem with the 24". Fortunately Apple replaced the monitor with a 27" at no cost, but hopefully this update fixes the issue for those still using these displays.
  13. macrumors member


    Oct 11, 2007
    I still think it is unwise to install a firmware update without an official notice from Apple.
    I was one of the few who got the firmware from Apple Engineering and they told me it was specific to my machine. I suppose there might be different chips on the 24ACD throughout it's production run.

    It has worked for me, so far.
  14. macrumors 68030


    Feb 2, 2004
    Pacific Northwest
    They'd rather complain than admit they failed to by AppleCare or didn't think it would cover it.
  15. macrumors 68030


    May 1, 2009
    Logic board or display. AASPs have a way of finding out wich.

    It's a known issue, but not widely enough to warrant a warranty extension.
  16. macrumors member

    Jul 10, 2008
    first thought when I skimmed the headline: WoO a new cheap 24" Cinema Display :)

    Then reality set in ;)
  17. macrumors 6502a

    Jul 10, 2008
    Quite some time? The very longest is 8 weeks! the hardware has only been available since July. In this period of time you've had plenty of opportunity to return the product or have it repaired/replaced by Apple.
  18. FFX, Sep 29, 2011
    Last edited by a moderator: Sep 29, 2011

    macrumors newbie

    Sep 6, 2011

    If you pay 1000$ for a monitor, it should at least work when you get it. I would never buy a product with "Apple Care" why should you pay extra, to get a regular warranty, that products must include by LAW.
  19. macrumors 6502


    Oct 11, 2007
    Hmm, had no issues with my MNA 2011 11" on the thunderbolt display. I'm not sure if I need to install this update. It looks like a typical case of "if it isn't broken in the first place, don't fix it"
  20. macrumors G4


    Mar 24, 2006
  21. macrumors 6502a

    Hey Jude

    May 9, 2008
    Same here ---- I assume you meant "MBA". Yep, I'm going to leave well enough alone on this one, too.
  22. macrumors newbie

    Jul 22, 2009
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

    I had the flickering problem with my 24" acd. Got a free thunderbolt display because of it!! Yaaaaaaaaas.
  23. macrumors newbie

    Jan 7, 2010
    You really have no idea what you are talking about. I love Apple apologists. :rolleyes:
    It isn't only 8 weeks that this has been a problem. This affects people with a 24" ACD with a 2011 MBP. I've had the problem since February when I bought my 15" MBP 2.2 and have been waiting patiently for the fix to come along. I am a graphic designer by profession and trust me, the flickering has been a major problem. I've tried every patch they have offered (some made the problem much, much worse) and the last one actually made the flickering livable so I'm hesitant to try anything new until I hear this is actually an "official" patch. My 24" ACD is out of warranty, but the business rep at our local store is willing to help me if this doesn't do the trick. I don't want a 27", I want the 24" that I have to work because it fits my home office space.

    Enlighten yourself, go to:
    if you think the problem has only been going on 8 weeks.
  24. macrumors 601


    Feb 4, 2004
    Florida Resident
    It reminds me of the "Flicker fixer" card on the Amiga 2000.
  25. macrumors 6502

    Dec 14, 2009
    Charlotte, NC
    What country do you live in that requires a 3 year warranty by law?

    Edit: and 3 years free phone support

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