Fat chance of that happening given how the world just lurves Microsoft.
Your best bet will be to run it in a virtual machine from VMWare or Parallels. I can recommend VMWare fusion (http://www.vmware.com/products/fusion/). You will need to have a copy of Windows, preferably XP. Can't be bothered to mention licensing.
The benefit is that once you've installed the VM, you can run Windows in a window. It's also dead easy to back it up. The other benefit is that as Windows is running the RYA training CD plus other Navigation software, you won't need any of the anti-virus treacleware (e.g. makes your machine run like treacle).
The other plus point is that once you've done with using the chart plotter, you can pause/turn off the Windows machine and go back to the nice Mac environment.
Just to clarify -- using Virtual Machines is a great way of getting the best of both worlds; using the Mac for email, web browsing, writing documents, etc., but using Windows *only* for specific tasks that aren't connected to the internet. In that case you can get away without running Anti-Virus software.
Obviously there's still a risk of catching some Windows malware, but it's small. If you've any doubt, install and run Anti-Virus software.
One side benefit of using VMs is the ease that you can back up the VM and thus recover it if Windows wobbles and fails.
No - you have to use a machine that has to be loaded with software, cursed, cuddled, impervious to threats to beat it, throw it outside and set it on fire while performing illegal operations to worry the newcomers in disturbed night's sleep. Unless you do nothing with it except use it for one task at a time.
In time - like forever, the RYA will think about doing one that does run on a Mac
I neatly sidesteped that one and loaded the RYA training plotter (and other PC-based sailing software) on SWMBO's laptop in the house - and leave my Mac nice and clean in the office.
and if all that sounds too much trouble, be reassured that nothing in the DS or YM theory syllabus assumes that you have access to it. (or at least this was the case when I did mine in 2006/7 and 2007/8.) We were told to install it and 'play' with it, but that was all.
It is an impressive bit of software, but it lacks a little context as your desk never moves....