You gave no information about version number or time frame.
Had you bought the boxed disc version, you would software and serial numbers for both Apple and PC. If you bought the download version very recently you should be able to get a refund and use the credit for an Apple version. If you bought a PC version "a while ago", you will probably have to buy an new and fresh Apple version.
On the opening page for this forum there is a link to customer support to process your refund if you qualify.