IMac :: 21.5 Brightness Vs 27 Brightness?
Aug 1, 2010
I went to Best Buy yesterday and they just got the new imacs in and had on display side by side. The 21.5 display was not as bright and vibrant as the 27 display. The apple and best buy guys could not tell me why the difference. The settings were checked and found to be the same for both machines. I was going to get the 21.5 but now not so sure. I definitely like the brighter 27 better. Is this normal? Why is the 27 brighter? Has anyone else noticed the difference?
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Nov 15, 2010
The brightness goes up when you plug in your MBA, but then over time it just goes up and up. I honestly like my brightness pretty low (rarely more than half, typically at 3-5 notches), but it just keeps on going up and up. I almost never set it above half, but multiple times a day, I notice that it looks pretty high and it's at like 3/4 so I put it it down to about 1/3, but after a while, it's just up again.
Anyone else notice this? What is it, why does it do this? How can I fix it? I don't mind not having auto-brightness (even though I loved it), as long as my screen doesn't keep going up.
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Nov 28, 2010
I have the 21" iMac and need to brighten the screen. How do I do this?
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Jun 20, 2009
So I installed Vista 64 bit on my Macbook Pro (Santa Rosa), I installed most of the drivers I can find, but I cant get the screen brightness buttons to work (F1 and F2)
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Feb 17, 2008
I have dual ACD's. How do I make it so that both screens have the same brightness? If I adjust the brightness in the display settings it adjusts the main screen, but then not the other one. How do I make them the same?
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Nov 26, 2010
I have a 27 iMac, and a 22 inch Viewsonic as the second monitor.
The second monitor is just not bright. I have used another monitor as a second monitor as well. Both are just not bright enough to suit me.
I have fiddled with the brightness controls, to no avail.
Is that a generic problem with second monitors?
They just don't get enough juice or something?
Would another brand monitor help?
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Mar 23, 2009
i got a question about adjusting the brightness level on iMac.
i adjust the brightness to lowest but each time i restart or turn the computer back on, the brightness level would set back to highest. Is that for all the imac? is there a way to set it?
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Apr 20, 2009
I have a new iMac 2009 - 24' - 2,93Ghz, running the latest OS.
When I start, the brightness is at maximum... I set it to minimum, only to find it at maximum again when I re-boot the computer ! I tried setting it via settings as well... it just dosent stick !
On the flip-side, the volume retains its last settings.
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Aug 7, 2009
Am I the only one having this bug? I have a 2009 24" iMac Radeon 4850 and after installing the 10.5.8 combo every time the machine boots the brightness is set to maximum.
I tried zapping the PRAM and that didn't help.
The other problem I noticed is that my startup network shares, even though checked to "hide" pop up finder windows at boot time. It never did this before (even without hide being checked).
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Mar 11, 2009
the monitor's default brightness setting is far too bright for my eyes, so the first thing I did was to open the System Preferences pane and reduce the brightness setting. That worked fine until I shut the computer down. On rebooting, the brightness returned to its default highest setting. On my older iMac G5, the brightness setting always stayed put. It isn't a huge problem since adjusting the brightness setting does work, but I don't want to have to adjust it every time I reboot my computer.
I spent two hours yesterday on the phone with Apple support trying to fix the problem, even going so far as to reinstall the system software with no success. The woman on the phone finally suggested that I return the Mac for a replacement.
Has anyone else here with a 2009 iMac experienced this problem? Is it possible that it's hardware related? If so, could this be the tip of the iceberg suggesting a potentially larger problem down the road? I would have guessed it might be a software glitch. (The new iMac has thrust me, finally, into Leopard; until last week I was using Tiger on my older G5.) I bought the 3-year Apple Care with it--since the new iMacs have only been out a week, should I wait until the next Leopard update and see if that fixes the problem?
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Aug 25, 2009
After every reboot, the brightness of my iMac's screen changes to 100% brightness, which is slightly annoying. Does anyone know why this happens? By the way, I'd say it does it since 10.5.8.
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Sep 9, 2009
I have a Rev A (Aug 2007) alum iMac (20") and ever since I installed 10.5.8, the screen has been set on full brightness on every startup. I'm currently running Snow Leopard and the problem persists. I erased and installed during the procedure so I don't think it can really be a corrupted system file or something.
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Jun 30, 2010
Today morning, when i switched it on, I saw that the back fan is moving with more speed and sound . earlier, I never heard the fan sound. Also, on startup the brightness is set to max , while my settings was very low brightness. Howcome, its starting with max brightness now, when I dont have changed anything ? And what about the fan sound and speed? And yes, does the iMac has a battery also ? for what? Its always plugged to AC current, then what is the battery doing ? I never knew that. just downloaded istat pro and it shows HD 35 degree and Battery 55%. Wht is it ?
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Sep 3, 2014
Suddenly my iMac's display is very dim - almost can't read the text. The display brightness keys <F2> and <F1> don't do anything any more. How can you adjust the screen brightness?
Info:
iMac (21.5-inch Late 2009), OS X Mavericks (10.9.4)
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Jul 23, 2010
All of a sudden, every time I reboot, my screen's brightness is all the way up. So, I go to 'Preferences' and bring it down to only happen again the next time I reboot. Not a terrible problem, I hope, but not sure why the settings of this doesn't remain as I left it last. Perhaps I have picked up something OR I have a fault which could get worse?Anyone seen anything like this?
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Jul 29, 2010
Just got my new i7 in the mail today after waiting for the refresh for 5 months and it has that stupid high pitched noise that you get when you adjust the brightness. I returned four of these things at the beginning of the year (2 HD failures, 1 power source failure, 1 DOA), one that had the hd failure also had this same high pitched noise.
I love these computers (minus the complete lack of quality control), so I don't want to switch back to PC, but I am at my wits end here. Apple already gave me $150 off this computer for me trouble, but I just don't know if its worth the hassle anymore. I am returning it for sure, but would you ask for more compensation, maybe a ram upgrade or something? I don't like to be the guy who asks for free crap, but the way I see it, they can give me another hundred $, or I can go back to pc and they lose a customer for life.
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Sep 10, 2014
How to keep the Brightness meter icon from appearing on your screen?
Model Name: iMac Model Identifier: iMac12,2 Processor Name: Intel Core i5 Processor Speed: 3.1 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 6 MB Memory: 16 GB Boot ROM Version: IM121.0047.B1F SMC Version (system): 1.72f2 iMac (27-inch Mid 2011), OS X Mavericks (10.9.4)
Info:
iMac (27-inch Mid 2011), OS X Mavericks (10.9.4)
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Nov 30, 2014
My wife has an iMac (I don't know any other way to identify it e.g. model number), and she has this 3rd party calibration software that I'm trying to use. I am not used to a Mac, and I cannot find the display settings for the monitor. There are no buttons on the monitor, and when I go to preferences, I can only find the brightness control. I've googled this and cannot find a clear, simple answer. I have used every version of Windows (currently on 8.1 on my PC) and it's easy for me on that platform. I suppose it's just that I don't really know how to navigate Mac OS.
Info:
iMac, Mac OS X (10.6.8)
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Oct 29, 2010
I just received my very first iMac two days ago & just noticed this horrendous whistling noise that reminds me of leaving a really loud concert. It coordinates with the display's brightness apparently (I looked it up before hand) & stops whistling at max brightness & min brightness. Anything in between = whistling.
How should I address this problem? Should I just go to the Apple store & have them replace my iMac? :/
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Aug 17, 2007
for my macbook pro, it has a button that will kill the keyboard light, then restore it when pressed again, i need a button, or an app with a hot key, that does the same thing for the LCD backlight, i often leave the machine on and that requires the lid being open, so i have to hold down the dim button until it goes out, then restore it the same way, so thats what im looking for any ideas?
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Nov 2, 2007
OK so I didn't complain in 10.4 too much but why in the name of god they could't fix that issue in 10.5? You can click as much as you want in preferences and still after restart its coming back to defoult...I hate when my screen goes dark when power adapter is on. Anyone have this issue???
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Nov 22, 2009
Seeing as I have lost my brightness slider in Prefs/Displays and my F1 F2 Keys do not function as the brightness control
can anybody suggest a brightness App I can use ?
Well other than Shades or Brightness because both of those mess with your colour profile/profiles.
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Jun 24, 2010
My Apple ADC Studio Display has decided to stop all of it USB ports from working and as anyone who knows about these monitors you need to connect the monitor to a USB port to get the Brightness control to work, are there any apps out there which can control the brightness of the monitor up or down. I have played around with Calibration but I still cannot change the brightness of the screen. I have searched around for some solutions but all I have found is brightness controls which turn down the brightness but do not allow you to adjust the brightness up
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Sep 26, 2010
My Macbook Air is doing something pretty strange..
This is as far as my brightness will go up. This is using the keyboard brightness thing on F1 and F2. When I go into the system preferences, I can drag the brightness to the top, but as soon as I release the mouse, it automatically flicks back to where it was before without getting any brighter.
Does anyone have any ideas as to the cause?
The model number of my macbook is A1342 if that helps.
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Oct 19, 2010
I am calibrating my system with spyder2 and it wants me to set my brightness back to the default. What is the default setting for the brightness?
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Oct 28, 2010
How bright is the default Macbook Air Brightness? Mine is fully maxed, did it come like that?
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May 10, 2009
I recently bought a new Kensington Slimtype keyboard for my PowerMac G4 (dual 867mhz); it's running Leopard and everything other than this is working beautifully. For some reason, whenever it goes to sleep, it turns the brightness down to it's lowest setting - not a huge problem, I just turn it back up. Just wondering if anyone else is having this problem and if they are, how did they rectify it?
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Aug 3, 2009
I have mine on one bar and I am finding this okay. Full brightness practically burns my eyes. Where do you have your brightness set to?
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Apr 26, 2012
I have a Macbook Pro 13.3 ", only a few months old. When I use this, whether I use the word, web surfing etc then adjust the brightness of the screen itself from strong to weak and back, all the time. This happens both when connected power and do not. And no, it's not that it goes into power saving mode, this occurs during use.
Info:
MacBook Pro
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Jun 22, 2012
The brightness is turned all the way off on my MacBook pro and the only way to turn it back up is through system preferences. But I cant see it and everytime I push the brightness control keys it makes a beeping noise. And won't do work.
Info:MacBookPro
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