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OS X - Operating System General OS operation information and support

changing boot up display settings


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calcarrera

 
Member Since: Jun 09, 2012
Posts: 2
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I have a MacPro with OS X. I mistakenly set the disply settings for a new TV monitor setup at 800X600 at 120 Hz. Now the monitor won't recognize the input signal. I need a way to change the boot display settings to less than 120 Hz.
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