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Sometimes my display on the screen increases in size

201 Views 2 Replies Latest reply: Apr 28, 2012 1:17 PM by Jim Tee RSS
Ron1942 Calculating status...
Currently Being Moderated
Jul 13, 2011 6:16 PM

Sometimes my display on the screen increases in size so that I can see only about 1/4 of the display on the screen.  I can return to normal by restarting--is there any other remedy?  How can I prevent the problem?


Screen shot 2011-07-13 at 5.48.11 PM.png


The screenshot shows the appearance my entire screen when it's in this mode.  I have an iMac 3.06 GHz Intel Core 2 Duo.  These are the Display/Graphics specs:

NVIDIA GeForce 9400:


  Chipset Model:          NVIDIA GeForce 9400

  Type:          GPU

  Bus:          PCI

  VRAM (Total):          256 MB

  Vendor:          NVIDIA (0x10de)

  Device ID:          0x0869

  Revision ID:          0x00b1

  ROM Revision:          3454



  Resolution:          1920 x 1080

  Pixel Depth:          32-Bit Color (ARGB8888)

  Main Display:          Yes

  Mirror:          Off

  Online:          Yes

  Built-In:          Yes


Any suggestions would be welcome.  Thanks.

iMac, Mac OS X (10.6.8)


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