Have you guys checked the viewing angle of your iMacs? I do think that since the screen is huge, the light traveling through a piece of glass will refract similar to what happens when you get a rainbow after the rain.
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Late 2013 27" iMac, yellow screen issues :(
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to me it looks good.
do you notice a difference if you are moving a finder window from the bottom left to the bottom right?
Here is a new picture showing the slight yellow tint i am mentioning.
I can still return/replace it to Apple Store but I'm wondering whether it would be a waste of time if I ma end up getting something worse.
Thanks everyone for your input.
You're probably not going to get anything better than that. I've personally been through two 27" iMacs and seen 4-5 ones at the Apple Store, and they all have subtle yellow tinting towards the bottom. Heck, even the 21" iMacs, 27" TB displays and MacBooks have the yellow tinting. I just guess it's the nature of the screen, either of how Apple designed them to be or how IPS displays are.
The yellow SHOULD be very light and quite uniform though (as is on mine and those I've seen at the store), so it shouldn't be a lot more pronounced in one corner or area. However, if it doesn't bother you through your regular usage, I wouldn't exchange it. Like you said, you could definitely get a screen much worse with stronger yellow tint, dead/stuck pixels and backlight bleed.
I would never exchange mine. It has one of the best screens you can possibly get with great uniformity and little to no backlight bleed. I only notice a very subtle yellow tint towards the bottom if I purposely look for it and do a finder dragging experiment from top to bottom. Under normal usage conditions you cannot detect it. I even think it could be a viewing angle problem, since the yellow tint does fade away if I lower my head towards the bottom. I noticed if I tilt my iPod Touch a bit, it also becomes yellower on the bottom compared to the top as well.
Thanks Seramir for your input. Yes except for this subtle yellowish tint, others are all good. I am happy that it doesn't have any bright pixels and noticeable light bleeding.
Additionally, returning this 10kg beast by carrying it in Hong Kong is not funny at all.
I would probably keep it.
I notice the yellow more on the lower right of my screen as well. I am trying hard to not notice it for now since I know there's little that can be done. If in 6 months it's still a problem for me I may ask they replace the screen. But for now I guess I'm happy I don't have worse problems.
For what my opinion is worth and given the folks here that say its normal or fine or all displays have yellow tint on them. Well personally I'm on a late 2010 27" iMac. I run Win7 through Bootcamp and mainly use Windows on my iMacs. Now this having been said I come to find that if or when using the original Mac OS that you do indeed notice yellow areas being a bit more apparent compared to when using Windows through Bootcamp. I would say the OS you run depicts how much yellow is actually on your screen. For example when I start Windows up the only time I see the yellow tint is during the actual start up of the OS when the screen is all black with the Windows image moving around starting up. At this point is where I notice yellow on all four corners of my screen, none of it even as each other but more or less there is indeed yellow ish light around the screen. Now once booted into Windows no matter what I do I don't see a single bit of it.
I would have to say same goes for when booted into the original Mac OS I barely notice it unless I was to really look hard for it or have something big and white I was working on in the OS then I may see the uneven yellow-ish tint everyone here is talking about. I've had other 27" iMacs later than 2010 that were all pretty much the same, this being said I have yet to have a 2012 or later iMac but I would expect it to be the same (with yellow tinting if thats what you wanna call it). I've looked at this as being the norm as its just part of the light that lights the display. I also looked at the screen from different angles in which its like all other reflections, you may see more yellow in one area than the other based on angle, however when looking directly at the screen from a straight forward view you don't notice much of it or any of it, really.
As of recent I've been thinking about picking up the newest current 27" iMac and hand down my 2010 iMac to my mom and my biggest concerns is the dead pixels I see people talk about here and also image retention. The whole yellow thing to me personally is normal. Then again this is just me based upon never seen one that did not have any yellow tint you folks are referring to.
I would have to say same goes for when booted into the original Mac OS I barely notice it unless I was to really look hard for it or have something big and white I was working on in the OS then I may see the uneven yellow-ish tint everyone here is talking about. I've had other 27" iMacs later than 2010 that were all pretty much the same, this being said I have yet to have a 2012 or later iMac but I would expect it to be the same (with yellow tinting if thats what you wanna call it). I've looked at this as being the norm as its just part of the light that lights the display. I also looked at the screen from different angles in which its like all other reflections, you may see more yellow in one area than the other based on angle, however when looking directly at the screen from a straight forward view you don't notice much of it or any of it, really.
As of recent I've been thinking about picking up the newest current 27" iMac and hand down my 2010 iMac to my mom and my biggest concerns is the dead pixels I see people talk about here and also image retention. The whole yellow thing to me personally is normal. Then again this is just me based upon never seen one that did not have any yellow tint you folks are referring to.
A question from a "soon to be" 27 iMac owner.
Has anyone ever tried adjusting the display with e.g. a Spyder Pro or similar?
Does it look better afterwards?
Some of the pictures I've seen just look badly adjusted to me.
I am planning on using it mainly for Photoshop, Lightroom etc. not professionally but ambitious amateur. If everything I do ends up with messed up color due to the display i have to rethink the iMac....
Has anyone ever tried adjusting the display with e.g. a Spyder Pro or similar?
Does it look better afterwards?
Some of the pictures I've seen just look badly adjusted to me.
I am planning on using it mainly for Photoshop, Lightroom etc. not professionally but ambitious amateur. If everything I do ends up with messed up color due to the display i have to rethink the iMac....
I myself have Mid-2011 27 inch iMac(base 2.7 i5) and a 27 inch LED Cinema Display as an external(I believe my Cinema Display was produced around 2010-2011). I got my iMac's display serviced through AppleCare, because it had some weird gray ish looking dot on my screen. Before it got replaced, I always thought my display was just piss yellow compared to my LED Cinema Display.
After the display replacement, it's STILL piss yellow. Though it's not as yellow as it used to be. Since I removed the screen of both displays I had for my iMac I know they were both LG panel.
Now I'm curious if my LED Cinema Display is using Samsung panel. If then, I'm also curious if the displays are interchangeable between iMac and LED Cinema Display? (I heard lots of things how they share the same panel... but not sure)
After the display replacement, it's STILL piss yellow. Though it's not as yellow as it used to be. Since I removed the screen of both displays I had for my iMac I know they were both LG panel.
Now I'm curious if my LED Cinema Display is using Samsung panel. If then, I'm also curious if the displays are interchangeable between iMac and LED Cinema Display? (I heard lots of things how they share the same panel... but not sure)
Apple have just replaced my 2012 iMac for a 2013 one because of multiple display issues.
It just arrived and yes, the display is very uneven.
But I would feel like I was taking liberties asking them to replace my replacement.
Have they tried repairing it first? What sort of issues did you have? Did you have to visit the apple store a few times?
Apple have just replaced my 2012 iMac for a 2013 one because of multiple display issues.
It just arrived and yes, the display is very uneven.
But I would feel like I was taking liberties asking them to replace my replacement.
If anyone is taking liberties, it's Apple for selling machines with crappy unreliable panels in!
It took 3 attempts (and around two months) for me to get a working iMac (2013) with a nice even screen. Some people may see it as picky, but I work in design and having an even toned screen is pretty important and also, if I am spending over £3k on a computer, I expect it to be amazing.
im doing the same... i got my first replaced screen (not ne entire imac) and it has a yellow tinted right bottom corner... im gonna return it again. i already spoke to my retailer... we are going all the way to a 3x repair and see what apple will do then.
i really, really can't believe how apple could use those really really bad quality displays.
i just can't believe.
Is the new screen calibrated?
So if I get a new screen on mine (as opposed to a replacement), is it calibrated?
I see that on the apple web page they talk about how these screens are all calibrated...
https://www.apple.com/au/imac/design/
Individually calibrated for true-to-life colour.
None of these innovations would matter much if the iMac display didnt deliver vivid, true-to-life colour. Which is why we put every single display through an exacting colour-calibration process using three state-of-the-art spectroradiometers: one to measure gamma, one to measure white point and one to check the work of the other two. This equipment is tuned to meet colour standards recognised around the world for precision and accuracy.
The Apple store confirmed they don't perform any calibration there.
Does anyone know if the screens are calibrated at the factory as a part (that can be swapped in), or is it done as a whole unit (in which case a replacement screen is NOT calibrated).
So if I get a new screen on mine (as opposed to a replacement), is it calibrated?
I see that on the apple web page they talk about how these screens are all calibrated...
https://www.apple.com/au/imac/design/
Individually calibrated for true-to-life colour.
None of these innovations would matter much if the iMac display didnt deliver vivid, true-to-life colour. Which is why we put every single display through an exacting colour-calibration process using three state-of-the-art spectroradiometers: one to measure gamma, one to measure white point and one to check the work of the other two. This equipment is tuned to meet colour standards recognised around the world for precision and accuracy.
The Apple store confirmed they don't perform any calibration there.
Does anyone know if the screens are calibrated at the factory as a part (that can be swapped in), or is it done as a whole unit (in which case a replacement screen is NOT calibrated).
Phooey. My Thunderbolt Display and my 2011 iMac didn't do this.
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If having an accurate, calibrated screen is really that important to the work you do on your computer then (a) you probably won't be using a current iMac display because of the rampant uniformity issues and (b) you'll have your own colorimeter to calibrate the display yourself.
I've calibrated all of my Apple displays to D6500 color temperature and gamma of 2.2 and they all wind up looking different after my calibration than they did out of the box. Assuming my meter is accurate (and there's no reason to think that it's not), I'd take Apple's calibration claims with a huge grain of salt. Sure, the factory calibration is better than nothing, but it won't be as good as a calibration you do yourself. Besides, displays drift over time, so even if the factory calibration started out correct it won't stay that way.
tl;dr version: the replacement screens probably aren't calibrated, but it's not a big deal.
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Man, that's a keeper. That's far better than the two 2013 iMacs I had. Don't press your luck.
I have had my maxed out iMac for about two weeks. I have observed some "yellow" screen at start up. No yellow noticed afterwards. I am very pleased with my new purchase. No noise, no yellow in corners, and faster than fu_k. Just my observations.
I just received my new 27" iMac. The screen is exhibiting a slight yellow towards the bottom third, and a bit more noticeable in the bottom right corner. I used the test here to check the screen for dead pixels and the yellowing:
http://imac.squeaked.com/test.php
Note the yellowing problem has existed for quite some time now with iMacs. I have some degree of yellowing on a 2007 24" iMac.
Although I need to have some level of color accuracy as a hobbyist photographer, I'm not going to bother with a replacement since the odds of getting a "perfect" screen seem quite low, and I frankly don't want them messing with what is otherwise a perfect machine from the factory.
I will try color calibration using the tools that I have to see if that makes any difference to the yellowing problem. If it still bothers me, I'll use my 20" Eizo for processing critical photos.
http://imac.squeaked.com/test.php
Note the yellowing problem has existed for quite some time now with iMacs. I have some degree of yellowing on a 2007 24" iMac.
Although I need to have some level of color accuracy as a hobbyist photographer, I'm not going to bother with a replacement since the odds of getting a "perfect" screen seem quite low, and I frankly don't want them messing with what is otherwise a perfect machine from the factory.
I will try color calibration using the tools that I have to see if that makes any difference to the yellowing problem. If it still bothers me, I'll use my 20" Eizo for processing critical photos.
I have looked and had other people look and I do not think that the "yellow" is a problem. I only noticed it maybe at startup, however, it was never a problem. Just my observations. I am totally happy with my display as of today.
today i just brought my imac back to reseller... again.
this is the 2nd screen replacement.
i hope this time the screen is fine. but as i said earlyer... i think this is a common imac 2012/2013 (slim version) problem that has not been admitted by apple to prevent MASS RETURN of imacs.
im really sure.
if some of the users didn't notice... fine... but im a photographer and i look closely on those things. its a mark of quality to me. and apple FAILS at this one.
im feeling really uncomfortable bringing my machine to the retailer... but i told them that i cant take this bad quality screen from apple. its about the principle. if they want to have that much money, they have to deliver perfect machines.
this is the 2nd screen replacement.
i hope this time the screen is fine. but as i said earlyer... i think this is a common imac 2012/2013 (slim version) problem that has not been admitted by apple to prevent MASS RETURN of imacs.
im really sure.
if some of the users didn't notice... fine... but im a photographer and i look closely on those things. its a mark of quality to me. and apple FAILS at this one.
im feeling really uncomfortable bringing my machine to the retailer... but i told them that i cant take this bad quality screen from apple. its about the principle. if they want to have that much money, they have to deliver perfect machines.
Good luck with that, but I think you may be setting your exceptions too high. I hate it when people throw around the word "perfect", especially when it comes to mass produced consumer electronics. There is no such thing as perfect machines or perfect anything, no matter how much you pay.
Do I have a slight temperature shift on my new 27" iMac? Sure, but it's within tolerable limits and I will never notice it unless I purposely look for it. I bought it to do work on and I can't be hassled with wasted time attempting to swap it out multiple times, including the inconvenience of lugging it around. The replacement may be worse or have other problems. My iMac is rock solid otherwise. I'm extremely happy I don't have dead/stuck pixels and back light bleed, which are much worse problems.
Besides, as already stated by a few people, I truly believe some slight temperature shift from top to bottom is normal for IPS displays. As a matter of fact, all the displays, iMac or not I've seen in the Apple Store have it.
Of course, if the effect is very noticeable or severe, then by all means get it exchanged. But not when it's so slight you can't really notice it until you look very hard.
I pulled up a great quote from another MacForums user giving some insight on this phenomenon.
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Some color shift may come with the technology, but I had two 2013 iMacs and the yellowing at the bottom of the screen was SEVERE. I have two Thunderbolt displays and neither of them have this. My 2011 iMac didn't have this issue either. Unfortunately in this case I think it has something to do with the way the displays are constructed and/or assembled in the new ultra-thin iMacs so you might be stuck with it.
I found the display gradient in the two 2013 iMacs I tried out completely unacceptable but fortunately I was able to step up to a Mac Pro which better suited my needs anyway. Judging by some of the pictures posted in this thread there are iMacs out there that have acceptable screens but my personal experience leads me to believe that they're few and far between.