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How to shut off iMac display when sleeping

1. Unlike regular monitors which I can shut off when I'm about to sleep to ensure darkness, how do I do the same with my iMac without shutting down the actual iMac in the process?  I mean, it might be processing something in the background so I dont want to suspend it, but simply switch the screen of completely.  I know I can dim the screen by pressing the F1 key, but want to darken it completely.

2. Also I am just registering for mobile me for the first time along with iCloud.  It is not recognising my itunes password.  Should they be the same / doesnt recognise my itunes email address.  I thought the Apple ID and mobile me/icloud use the same username and password?
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abdb469
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abdb469
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1 Solution
 
mccrickCommented:
Go to Control Panel/ Desktop & Screen Saver
Click on the Hot Corners. Choose a corner to set Sleep Display.

Exactly what you are asking for.
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abdb469Author Commented:
I have no idea what you are taking about.  Apple does not use a control panel.  What is hot corners?
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mccrickCommented:
Right, They are called system preferences now. Sorry, my brain went back a decade or so.
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mccrickCommented:
Under the Apple Menu

Select: System Preferences

Select: Desktop & Screen Saver

Select the button: Hot Corners

Choose a corner to set the command to Sleep Display. Press OK

Close the System Preferences.

Now when you move the mouse cursor into the corner you chose, the screen will sleep until mouse movement, but the computer will continue running as normal.

Hopefully, this is more clear than my original post.
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abdb469Author Commented:
that's pretty cool....I'm still new to the mac environment.

Shutting off the display like that.....is that energy saving? Im sure it is right as it doesnt light up the screen, but of course it is not full energy saving as its not in suspend mode.

Any idean about increasing the screen resolution?  Im using a 27" iMac so the text feels so small

thx.

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mccrickCommented:
Yes it saves energy. Using the energy sys prefs, you can save more energy by sleeping the drive or the computer itself.

As for increasing resolution, that means would mean making the text even smaller as resolution would be defined as number of dots used in a given area.

If you decrease the resolution then the everything on the screen gets larger.

Rather than do that though, there are places throughout your computer where you can make the text larger without changing the resolution of the screen. Try CMD "=" or CMD + or - without the shift key. This will change the size of things in this page. Works all over. But there are other techniques you can research.
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abdb469Author Commented:
Yes, I know that you can pinch certain screens like in Safair to increase or reduce the size of the text/images etc or zoom in.  Just finding the text a little too small but then I guess that is expected given the larger size screen.

One final question related to the original question before I close this question.  Does the concept of hibernation not exist on the mac like in Windows.  This is where you can save all open sessions to disc run than suspend the open session to RAM?
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mccrickCommented:
That seems to happen on Mac laptops where a dying battery could really ruin your day. Haven't noticed it on the desktop models. Maybe it's doing it secretly. The test would be to put your computer to sleep and then pull the plug. See what happens when you turn it back on.
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