I'm asking this because I'm considering distributing a commercial Windows application to mac users. The application would run in WINE, but WINE depends on X11.
I've read that X11 is installed by default on OS X 10.5 and later, and available as an optional install on the installation dvd for OS X 10.4
Can I reasonably expect X11 to be available on most of the users' computers? If not, how difficult it would be to install for the user? Can I just provide them a link to download and install it from apple's website?