I don't think there is a version of Fritz specifically for Mac, so you'll either need to use "Crossover" to run Fritz inside Mac OS X or use "Bootcamp" to install Windows in a dual boot configuration and then run Fritz from within Windows.
Look to see if there is a "system requirements" section in the manual to see if it specifies a Windows version.
With the sub-par user manual for Fritz, I was unable to determine definitively the answer to this question:
Will Fritz run on a Mac?
Thanks for your help.