Dimming iMac screen

I've been using powerbooks for the last few years, and the dimmer keys will gradually dim the screen from bright, to dim, to almost dark & then compleely dark.
On the iMac, it dims the screen, but not to the same degree as the powerbooks. I'd like to make my screen darker than seems possible.
Is this a normal function of the iMacs?
Thanks

The iMac screen is bright - especially in the normal room lighting conditons (as opposed to office lighting). For normal viewing gamma 2.2 and white point 6500 are best (native gamma and white point can also be used as they are close to these values) Gamma 1.8 looks pretty bad on these machines.
If that is still to bright you can make a dark profile in the Display pref pane's color calibration area with the expert settings (pull all the sliders down) - but that really will only increase the contrast - for the most part the whites will stay just as bright.

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IMac screen going dim . . .

Lately my older imac screen has been somewhat dim when waking from sleep.... only happens sometimes, seems to be normally bright at the bottom, growing dimmer the further toward the top you look .... if I restart, everything is fine again.
Hardware problem? Seems unlikely since it seems unrelated to how long the computer has been on, it's immediately fine on restart. Any ideas appreciated . . .

Some problem with my iMac. Took it back to the Apple Reseller, they 'repaired' it after 3 weeks. Got it back, still the same problem. Called them and they said is was a normal buzz which the inverter card(?) makes, like the fan and the HD.

My iMac screen goes bright and dim randomly, any idea why?

my iMac screen goes bright and dim randomly, any idea why?

Sounds like a power issue.
Try Resetting the System Management Controller (SMC)

How to keep iMac screen black while keeping secondary monitor running for visual experiments in Matlab

Hi,
I'm trying to run a visual experiment using PsychToolbox in Matlab.
I've attached a secondary monitor to my iMac for this purpose and I'm having difficulties trying to
'black out' the iMac screen.
I need the secondary monitor to run at a refresh rate of 120Hz and at linearised luminance (did this for my secondary monitor),
so I can't really use my iMac screen. However, i need my iMac screen to be darken out because I'm doing a vision experiment.
I tried dimming my iMac screen but it doesn't go completely dark. I tried Ctrl+Shift+Eject (or was it Command) but it will darken both
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shui
NB:I'm using OS X Version 10.8.3.

I do not know the details of your experiment, but creating a black monitor is not difficult. For example a completely black page, e.g. in Power Point, set to fill the screen?
The advantage of doing this with PP is that you can move in to or out of the black page with just the space bar. You can set up your monitors so PP is displayed on just one monitor.

IMac screen keeps waking up for no apparent reason

Here's a fun one. So we all know you can put your Mac screen to sleep by pressing controlshifteject on a Mac keyboard. This is what I usually do with my iMac as I tend to have it doing something at night (be it downloading, processing large files, ect.) but lately the screen only seems to want to sleep for about 10 minutes or so before it will turn right back on.
My old MacBook Pro used to do this but you could actually dim the screen right down to zero anyway so it wasn't that big of an issue. You can't do that with an iMac.
I've heard mention that it might be bluetooth related and I am using an Apple bluetooth keyboard and Magic Mouse but it seems to be doing it much more often of late. I thought it might be a battery issue but even with fresh batteries the issue continues.
Anyone know what's going on?

Next time you want to put your iMac screen to sleep, try switching off the Magic Mouse, wait for the notification to come up on the screen telling you the Magic Mouse has been disconnected, wait for it to disappear then press the keyboard shortcut to put the screen to sleep. See if that helps and we'll go from there. If that doesn't help, can you just say wether the screen always turns back on the same time every time?
Hope that helps
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IMac screen dead. LCD burned out.

iMac screen is dead. Tech says the LCD burned out. He said that I could connect it to a tv, via mini DVI to VGA; VGA to tv. I get the Leopard screen on the tv, but no tool bars, top or bottom. Can't turn extended screen mode off, due to black screen on computer. Tried F7, Command F7 and Command F1, none work. Any new suggestions would be appreciated. Thanks!

Do you know if the LCD screen has a bad backlight, or is the screen data drive bad? If it's just the backlight, shine a strong light on the screen, you should be able to see everything, just dim. I can estimate clicking on the Apple menu, then with a strong flashlight, I can easily see the dropdown menu to pick the System Preferences, and then to Displays and mirroring.
Perhaps you can tell us the exact model of iMac you have. We can devine that it's likely an Intel iMac with mini-DVi, but often folks are wrong about their details. Details can make all the difference in figuring out something you can do.

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet".How can I change ip address?

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet". If this is the root of the problem,how can I change ip address?
Ipad will connect no problem to other networks.

First thing you need I think is to get your iMac connected to the Internet.
Shut down your iMac and you iPad. Then power off your router. Wait 30 seconds and power up the router.
After the router indicates that it is connected to the Internet then start up your iMac and see if it connects. If the iMac connects to the Internet then your iPad should too.
If this power up sequence doesn't work you'll have to dig into the router setup to make sure it is working properly.

How do i connect my iMac Screen to Apple TV?

I have read i can connect my iMac Screen to my Apple TV via Airplay.
How do i do that?
I have Mac OS X Version 10.7.4
I have the OS X Lion ready to download and install, but can't back up my computer (no where to back it up to :/)

Welcome to the Apple Community.
OSX 10.7.4 is Lion
Lion doesn't support AirPlay of the Macs screen to the Apple TV.

I have a Thunderbolt iMac 27" with a Thunderbolt Display attached. I would like to use the iMac and Thunderbolt display in Target Display Mode for my new Thunderbolt MacBook Pro. So far, it seems I can only use the iMac screen itself. How do I do this?

When I press the Command + F2, the iMac screen becomes a secondary for the MacBook Pro, and the Thunderbolt Display becomes the primary screen for the iMac. I was hoping that both screens would become secondaries for the MacBook Pro. Does anyone know how I should proceed? I have tried to connect the Thunderbolt display directly to the MacBook Pro, and the iMac to the Thunderbolt Display via the separate Thunderbolt cable, but there was no difference. And since the MacBook Pro only has the one Thunderbolt port, I'm not sure how to proceed.

Yes, eww, the language definitely states two thunderbolt displays, but I can understand the confusion and was siding with how they could make the mistake to think it would work like they want it to. My appologies for not being clear on that point, but I think you make it clear that the language in the ad says nothing about an imac.
Having said that all the language about TB would suggest that this would be possible. http://www.apple.com/thunderbolt/
High performance on display.
Thunderbolt I/O technology provides native support for the Apple Thunderbolt Display and Mini DisplayPort displays. It also supports DisplayPort, DVI, HDMI, and VGA displays through the use of existing adapters. So you can connect your Apple LED Cinema Display or other display, along with multiple high-speed devices, all from a single port.

How can i see my Imac screen on my macbook pro wireless

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When posting in Apple Communties/Forums/Message Boards.......It would help us to know which Mac model you have, which OS & version you're using, how much RAM, etc. You can have this info displayed on the bottom of every post by completing your system profile and filling in the information asked for.
CLICKY CLICK-----> Help us to help you on these forums
***This will help in providing you with the proper and/or correct solutions.***

Any external monitors as good as imac screen for text?

hi all.
this is my first mac. it's a new 21.5inch imac with a 2.7ghz i5 proc running OS X 10.7.3 and 12 Gigs of RAM (8 Gigs from crucial for $50, who can resist?)
i've got it hooked up to an external samsung syncmaster B2330 running in 1920x1080, which is this monitor's native resolution. works fine. it's hooked up via the dvi port on the screen via the mini-displayport to dvi adapter for the mac. i switch this monitor to the vga port when i want to use it as my pc monitor also running at 1920x1080. there is a source button on the monitor. very convenient.
the issue is that they text on this screen when coming from the mac is not as clear was when coming from the pc despite the fact that the vga port provides much less bandwidth than the dvi port the mac uses. i've read that the mac and the pc display text on screen using different methods. my pc uses an nvidia display graphics card. i believe mac use ati based hardware.
there appears to be much more interpolation when displaying text from the mac. perhaps this is a text size issue i'm not sure. either way i read a lot on this monitor and need it to be as good as possible for that purpose.
so the question is, does anyone have experience with an external monitor that is as good as the imac screen for text display. i can't use the thuderbolt display or a cinema display since they don't switch to different ports allowing my to use a single external monitor for two machines. i'm willing to spend up if there is a reason to do so. i'm on these computers a lot. i work from home with some regularity and my job is all about reading.
any help is appreciated.
best, c

I have an dell 24" lcd as 2ed monitor and text look as clear as the imacs screen
but it having a t-nfilm lcd panel vs. the imacs ips panel the colour and contast look worse
but text look as clear
and it look the same when I boot up in win7 using bootcamp

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I have an iMac with iTunes 7.7/Leopard and an external VGA monitor (I use the standard Apple mini-DVI to VGA converter) then I use the external monitor to watch video from my iTunes library.
All works well - I have my desktop spread over both monitors, I fire up a movie from iTunes, move the video window across to the external monitor and everything is good - I can watch the video on the external monitor whilst continuing to work on my Mac - the iMac screen displays the Mac desktop as normal.
However, if I put the movie into fullscreen mode (view -> fullscreen on the iTunes menu), the external monitor displays the movie in fullscreen mode as it should, however the iMac monitor goes black.
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SM

I have an iMac with iTunes 7.7/Leopard and an external VGA monitor (I use the standard Apple mini-DVI to VGA converter) then I use the external monitor to watch video from my iTunes library.
All works well - I have my desktop spread over both monitors, I fire up a movie from iTunes, move the video window across to the external monitor and everything is good - I can watch the video on the external monitor whilst continuing to work on my Mac - the iMac screen displays the Mac desktop as normal.
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The only way to fix this is to exit fullscreen mode and go back to one of the view options (rg fit to screen).
Any ideas how I can have my external monitor in fullscreen mode and have my desktop back?
Many thanks
SM

How to i fix a flicker on my iMac screen?

My imac screen has just started flickering. I have researched it and it already a promblem with other mac's. How is this problem fixed? Thanks

You could reset the pram and smc to see if that helps. I would however suggest if the machine is within waranty you contact your local Apple store as this sounds like a hardware fault to be honest.

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For a couple of months now my 24" iMac screen keep misting up behind the glass around 30 mins after booting - anyone know a resolution for this? Will Apple replace the screen even though i've had it around 4/5 years now?

scottycross wrote:
For a couple of months now my 24" iMac screen keep misting up behind the glass around 30 mins after booting - anyone know a resolution for this?
It is common to get condensation between the display and front glass panel, if it is humidity and cool in your office or home.
A few things that you might try, are
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2. Leave the iMac on longer until the condensation dissipates.
3. Remove the front panel yourself and clean between the display and glass.
Will Apple replace the screen even though i've had it around 4/5 years now?
No, but if you contact your local Apple Store or AASP you can schedule an appointment to have it dried and cleaned.

24 imac screen freeze hard drive reinstall&hardware test ok

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Dimming iMac screen

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