So your business, or some form of income, depends on this software? And it wasn't worth the 2 sec Google to see if it will work on a completely different operating system?
(And I checked this by Googling: "Using Corel on Mac") BTW - this also mentions Bootcamp (dual boot) and Fusion (virtual Windows)...but to learn more about the requirements of those you should read up on them.
I also did a quick check on Corel's site, they released X5 apparently. The system req tab there doesn't mention Mac either so no luck for you there.
Apple will happily deal with Corel. Corel have likely decided that the investment in developing for Mac's (with their much smaller install base) doesn't provide a suitable return (times are tough and the two platforms are nothing alike).
And to wrap up...NIK provide 15 day trial software that you could download and check out yourself. It took me another 5 seconds to find this (I Googled "NIK demo").
I have a Windows Desktop PC and a Macbook Pro - am happy with both
(Oh and for any Photoshop CS user out there considering the switch - check Adobe's licensing as you may need to buy an "upgrade" or new license to move from PC to Mac, or vice-versa.....Lightroom was fine though...but check this yourself!!)
Good luck!
Geoff.