Mac or Windows...?

Carlos,

Dear friends,

I?m thinking about buying a MacBook Pro and I wanted to know if  
anyone can tell me what are the major changes, in ?R?, between a  
Mac, and a Windows.

The R itself is pretty much the same - the major differences are in  
the OS (better support for virtual memory, 64-bit support, it's a  
unix etc.) but not R (basically because we develop R primarily on  
unix and use unix-based tools to create the Windows version). The GUI  
for R is different on a Mac - it strives to be more intuitive to Mac  
users, but I don't think there are many features you would miss (you  
may rather find a couple of new ones). I suspect that R will be your  
least problem when switching to Mac OS X ;).

And BTW if you really crave for Windows version of R you can actually  
run it on a MacBook Pro in OS X even without installing Windows and  
it works :)
[screenshot at:
http://rosuda.org/misc/iMacWin.png
the Mac GUI is in the background, the Windows GUI in the foreground]

Cheers,
Simon