For details on disabling the function, see “Image display stops” in Frequently Asked Questions section. In such cases, disable the “App Nap” function. If projection fails, disable this function.
On a computer that has an automatic graphics switching function, projection may fail if “System Configuration” →“Energy Saving” → “Automatic Graphics Switching” is enabled.If it is not selected, manually switch to “Internal Speakers”. If sound is not output from the internal speakers, quit this software, and then make sure that “Internal Speakers” is selected in “Output” of “Sound” in “System Preferences”. If you are logged in to a “normal” user account, sound may not be output from the computer.