Other Common Errors

Jump to: HDCP Compatibility Error | Icons/Windows bigger or smaller than normal

HDCP Compatibility Error

HDCP Compatibility Error message in Mac OS X

From time to time, Apple computers and devices may encounter an error message about 'HDCP Compatibility,' like the one above. Follow these steps if you encounter an HDCP error:

1. Unplug the HDMI cable and/or display adapter from your device.

2. Save any open documents and restart your device.

3. Once your device has restarted and you have logged in, reconnect your device to the projector.

In most cases, this simple reboot is all that is required. If the problem persists, however contact andrewssupport@unl.edu right away and we can lend you one of our devices.

Icons/windows bigger or smaller than normal

Some devices will automatically (but unhelpfully) optimize the screen resolution for the projector, which causes your desktop, icons, windows, and text to appear much smaller than normal.

Screenshot of tiny icons on a Mac OS X device that is optimized for the projector
Optimized for Projector
Screenshot of normal sized icons on a Mac OS X device that is optimized for the built-in display
Optimized for Built-in Display

Follow the steps below to change your screen resolution settings (i.e., set them to match your laptop screen rather than the projector):

Change Resolution in Mac OS X

1. With your laptop connected to the projector, open System Preferences by clicking the Apple icon in the upper left corner of your desktop and selecting "System Preferences..."

Mac screenshot showing the location of the Apple icon and System Preferences

2. In the System Preferences window, click "Displays." (Second row, second icon from the left.)

Mac screenshot showing the location of the Displays button in System Preferences

3. One or two windows will open. Click on the window titled "Built-in Display."

Mac screenshot showing the Arrangement tab in the Built-in Display options

4. Click on the dropdown menu next to "Optimize for:" and select "Built-in Display."

Mac screenshot showing the Arrangement tab in the Built-in Display options

5. Your icons and windows should now have returned to their normal size, and you can close the System Preferences windows.