If you are using RealDrums - the drum part is green, the click will be an audio (not Midi). Thus it should go through your computer speakers along with the drums.

If you hear the drums but no click, go into Opt}Preferences|Count-in and make sure Audible lead-in is checked. If you don't hear drums through your speakers, make sure the volume is turned up.

If all else fails, do a factory reset under Opt|Return to factory settings

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