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Lifeisabeach

 
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Member Since: Sep 30, 2007
Location: Wilmington, NC
Posts: 6,933
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Mac Specs: iMac i3 (mid-2010) + OS 10.9; TV 3; iPhone 5S; iPad 4

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How exactly do you have the CRT connected to the Mac? Since the Mac Pro would only support digital signals (i.e. via DVI), and since CRT monitors are analog (I suppose there are exceptions), I'm betting that the Mac is trying to use a display resolution unsupported by the monitor.


Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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Lifeisabeach - Mac-Forums Member of the Month June 2009, Feb 2012, and March 2013.
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