Configuring Mac OS X for Multiple Displays

If your computer is connected to two displays, you can set them up to show a continuous desktop that extends across both screens. This is known as extended desktop mode.

Because Aperture controls the second display, you must keep your computer in this mode for the application to operate properly. If you work in mirroring mode, where the same contents appear on both displays, Aperture may not work properly.

To exit mirroring mode
  1. Choose Apple menu > System Preferences.

  2. Click Displays, then click Arrangement.

    Note: If the Arrangement button does not appear, click the Detect Displays button. If the Arrangement button still does not appear, make sure the second display is properly connected to your computer. For more information, see Setting Up Your System with Two Displays.

  3. Deselect the Mirror Displays checkbox.

After you connect a second display, your displays may show the arrangement of the desktop out of order. For example, the display that shows the hard disk icon and menu bar is typically on the left, so that your desktop extends out to the right on the rightmost display.

To rearrange the position of the displays
  1. Choose Apple menu > System Preferences.

  2. Click Displays, then click Arrangement.

    Note: If the Arrangement button does not appear, click the Detect Displays button. If the Arrangement button still does not appear, make sure the second display is properly connected to your computer. For more information, see Setting Up Your System with Two Displays.

  3. Drag one of the blue rectangles, representing one of the displays, to match the position of the display on your desk.

    Figure. Arrangement pane of System Preferences showing a display being dragged into a new position.

    The display screens temporarily refresh to accommodate the new arrangement.

  4. Drag the white rectangle to move the menu bar to the display on the left.

    Figure. Arrangement pane of System Preferences showing a menu bar being dragged to the display on the left.

The display screens temporarily refresh to accommodate the new arrangement. The contents of the screen may be rearranged to accommodate the new position of the menu bar.

To ensure proper color management from the time you download your images until the time you print them or send them to a professional lab, it is essential that you color calibrate your displays. Color calibrating your display or displays ensures that the colors you see on your screen are faithfully reproduced when images are printed.

For more information about color calibrating your displays, see Calibrating Your Aperture System.