Check your pref settings. Also make sure you plugged into the headphone outlet and the speakers do in fact work.
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Check your pref settings. Also make sure you plugged into the headphone outlet and the speakers do in fact work.
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=== Update (09/02/2015) ===
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Go to the Apple menu there you'll find the menu choice '''System Preferences ...''' Select it and a window will open.
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On the second row at the far right you'll see a speaker icon ''Sound'' click on it, that will open the pref settings for sound make sure the Internal speakers are set and the output volume is set to the louder side of the slide and the balance is in the middle.