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I have a Mac Pro with a DVI display, and I got a new DVI display for it.

I want to unplug the (only) display, and plug in the new display to that DVI port. And/or, unplug the existing display, and plug it into a DVI port on another (slower) graphics card. (Does that make sense?)

I've hot-swapped DVI displays on Mac laptops for years, but I've never done it with a Mac desktop. Will a Mac be cool with temporarily having zero displays?

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I realized I could bypass the "0 displays" issue by plugging display B into port C, unplugging display A from port A and plugging it into port B, and then plugging display B into port A. (I'm not brave enough to try 0 displays with all my stuff open!) So I don't need an answer to this, but I'm kind of curious, and somebody else might want to know someday. –  Ken May 26 '12 at 3:11
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Absolutely! At work we have multiple Mac Pro's that have 1 monitor between them hot-swapped and while there's up to 5 seconds of delay for the video to come through, it works great.

You can hot-swap displays, but not video cards - if that makes sense.

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