edipo
Level 1 (0 points)

Q: iMac screen suddenly oversaturated. ML. Redish-magenta colors

I have my osx system since 2007. i recently upgraded to imac 2012, 21.5" and Mountain Lion  (from imac 2007, snow leopard). I do professional photography.

 

Everything was fine until i notice that in some photos, my magenta-redishh colors were way to saturated. I DO food photography, speccially salmon and this particular salmon hue is very  very saturated now.

 

Also i notice an increased "GAMMA" compared to my previous monitor, but i was expecting that on new imacs. Any way, this gamma enhancement increases overall contrast too making everything worst.

 

Tried to change the monitor profile (i´m using thedefault by now) and nothing changes. Is very annoying not having fine control over the iMac screen. The visual callibration method is very unreliable. I did not touch the "universal acces" contrast either, that is not the issue.

 

I´ll try to load in safe mode, maybe is there a nvidia CUDA driver error?

 

Please i need help .i´m afraid is a hardware issue.

 

thanks.

iMac, OS X Mountain Lion (10.8.5)

Posted on Oct 7, 2013 6:43 AM

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edipo

Q: iMac screen suddenly oversaturated. ML. Redish-magenta colors

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  • by baltwo,

    baltwo baltwo Oct 7, 2013 3:04 PM in response to edipo
    Level 9 (62,256 points)
    Oct 7, 2013 3:04 PM in response to edipo

    Contact Apple's Support, formerly Apple Express Lane.

  • by edipo,

    edipo edipo Oct 7, 2013 5:58 PM in response to baltwo
    Level 1 (0 points)
    Oct 7, 2013 5:58 PM in response to baltwo

    Well, i have no support in my country. Argentina. I may take it to the semi-official service, but only if i have nothing left to do. It seems like those "not so clear" problems.

     

    Thanks. though

  • by William Lloyd,

    William Lloyd William Lloyd Oct 7, 2013 6:33 PM in response to edipo
    Level 7 (21,141 points)
    Oct 7, 2013 6:33 PM in response to edipo

    Default Mac gamma is 2.2 now which is standard.  Default way back 10 years ago was 1.8.  You want 2.2 for any photography-related work.

     

    Otherwise, for any color accurate work you simply must do a hardware calibration.  Anything else without a hardware calibration and use of the generate profile is just spitballing, whether or not it used to be close enough for you.

  • by edipo,

    edipo edipo Oct 7, 2013 7:17 PM in response to William Lloyd
    Level 1 (0 points)
    Oct 7, 2013 7:17 PM in response to William Lloyd

    OK. i´ve been using gamma 2.2 all this time in my old imac. But the new screen is very different. I have a datacolor spyder2 but is not good for the new led screen of my imac.  I´m not taking of fine calibration here. this saturation seems very wrong to me, and dont think is the default factory settings for all imacs.

     

    thanks.

  • by -g,

    -g -g Oct 7, 2013 7:49 PM in response to edipo
    Level 4 (3,217 points)
    Quicktime
    Oct 7, 2013 7:49 PM in response to edipo

    what app(s) is the problem occuring

    is your desktop off color

    i assume you tried rebooting the Mac

     

    what monitor profile is highlighted in

    system preferences> displays> color: display profile

    try highlighting the default Apple profile for your monitor (to rule out your current profile)

     

    download a copy of PDI WhackedRGB.jpg

    drag it into open Safari window

    open it in Photoshop

    Apple Preview.app

    do they all display its color correctly (they should all match)

  • by -g,Helpful

    -g -g Oct 7, 2013 7:56 PM in response to -g
    Level 4 (3,217 points)
    Quicktime
    Oct 7, 2013 7:56 PM in response to -g

    what color space (profile) are the problem files in

     

    do they have that icc profile embedded...

  • by edipo,

    edipo edipo Oct 8, 2013 5:14 PM in response to -g
    Level 1 (0 points)
    Oct 8, 2013 5:14 PM in response to -g

    i´m using the factory default monitor profile.

     

    I downloaded the whacked rgb image and it looks ok for me. on every app. a little oversaturated overall, but as expected on new screen.

    ç

    I also checked the embeded profiles and notice that the untagged and adobe rgb look more saturated on orange-magenta hue.

     

    I think is not as bad as i thought. Thanks a lot,.

     

    i´d like to re-dowload the original imac monitro profile, in case it is corrupted.

  • by -g,

    -g -g Oct 8, 2013 6:10 PM in response to edipo
    Level 4 (3,217 points)
    Quicktime
    Oct 8, 2013 6:10 PM in response to edipo

    I downloaded the whacked rgb image and it looks ok for me. on every app. a little oversaturated overall

     

    only color-managed apps will display whackedRGB correctly -- it will look blue on unmanaged apps

     

    if it is still showing a little oversaturated in Preview, Photoshop, Safari -- then your monitor profile doesn't quite match your monitor

     

    you might try using a fresh sRGB profile as your monitor profile (if that improves the WhackedRGB color) until you get the calibration figured out

     

    untagged and adobe rgb look more saturated on orange-magenta hue.

     

    untagged RGB on unmanaged apps generally gets sent straight to the monitor with no change

    you can test this in Photoshop by View> Proof Setup: Monitor RGB

     

    untagged RGB on color-managed apps (Safari, Preview) generally gets sent straight to the monitor with no change

     

    untagged RGB on Photoshop (you ignore the embedded profile or don't color manage) and Firefox (with Full Color Management Value 1 enabled), for all practical purposes, ASSIGNS the working default profile and CONVERTS to monitor RGB

  • by edipo,

    edipo edipo Oct 9, 2013 4:45 AM in response to -g
    Level 1 (0 points)
    Oct 9, 2013 4:45 AM in response to -g

    thanks a lot.

     

    i´m still confused about this. i think i have a little too much overall saturation, plus redish-orange-magenta is more evident.  Also there is too much contrast (or gamma ?) and maybe this is the cause of the saturation.

     

    dont know what to do here, i dont have the hardware to calibrate my imac. The SRGB profile looks to close to imac default monitor porfile.

     

    best !

  • by -g,Helpful

    -g -g Oct 9, 2013 8:09 AM in response to edipo
    Level 4 (3,217 points)
    Quicktime
    Oct 9, 2013 8:09 AM in response to edipo

    you could have something amiss in the Universal Access or corrupt install

     

    or your hardware could be the problem, did you reset the logic board

     

    at this point, i would:

     

    try a New User and see if the problem follows

     

    install a new OSX onto an external HD and boot off it and see if the problem follows

     

    if the problem is in the new install, Apple Care is your best option (why your monitor is so far off, it should be pretty close)...

  • by edipo,

    edipo edipo Oct 26, 2013 8:56 AM in response to -g
    Level 1 (0 points)
    Oct 26, 2013 8:56 AM in response to -g

    I did reset the logic board pram, and tried new user .  Nothing.

     

    did not have the chance to boot from external fresh install by the way. but i´ll try.

     

    Also, i hope this issues is solved on MAVERIck, wich i´ll install later this month, since is a little buggy yet.

     

    Thanks.

  • by Kurt Lang,

    Kurt Lang Kurt Lang Oct 26, 2013 9:24 AM in response to edipo
    Level 8 (37,639 points)
    Oct 26, 2013 9:24 AM in response to edipo

    Sounds like you ran into the same issue as a small number of users have with Mountain Lion. It affected both of our Mac Pros. The issue is fixed in Mavericks, but you could try this procedure if you prefer to remain in ML. It's what I figured out and use on our end.

  • by edipo,

    edipo edipo Oct 30, 2013 7:30 AM in response to Kurt Lang
    Level 1 (0 points)
    Oct 30, 2013 7:30 AM in response to Kurt Lang

    I tryed tweaking the srgb profile, as the post says. I did not helped. I think is for another issue related to the icons only.  My last resort is Mavericks now.

     

    thanks a lot

  • by Kurt Lang,

    Kurt Lang Kurt Lang Oct 30, 2013 8:13 AM in response to edipo
    Level 8 (37,639 points)
    Oct 30, 2013 8:13 AM in response to edipo

    Did you clear the cache files after tweaking the sRGB profile? If you don't, nothing visually changes. At least, not right away. As the OS eventually updates the caches on its own, they'll suddenly display as you expect.

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