I'm currently working with a relatively small event run by volunteers and we want to be consistent across our publications. Currently we use Optima for the body text in our publications, but it's recently come to my attention that this is a Mac OS X default font and so my Windows colleagues cannot use it.
As a result, we're interested in buying the font, but I've hit a roadblock: Google doesn't know whether the Mac's 'Optima Regular' is the Roman or Medium variant, or which it's closest to. As such, I turn to you, Stack Exchange: which Optima is the one included in Mac OS X?
Any help appreciated!