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If Minefield is a Mac OS X application, yes.

If not, you either need Windows/Linux via Boot Camp (extra partition) or run in inside a VM in Parallels or VMWare Fusion or Virtual Box.

Or do you mean that browser from 2006?
 
I'm on a mac and I wanted to run Minefield the way you can run safari/Webkit together without issues. Would Minefield kill Firefox?
 
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