There are two ways to run Manager Express on Mac:
1. Boot Camp (supports dual booting using Windows/OS X)
Requires an Intel-based Mac running Mac OS X 10.5 or later.
Learn more at Apple Boot Camp Support
2. VMware Fusion (run Windows programs on Mac without rebooting)
Requires 64-bit capable Intel-based Mac running Mac OS X 10.6.7 or later.
Learn more at VMware Fusion Overview
After you have loaded Windows on Mac using either Boot Camp or VMware Fusion, you can then run Windows programs such as Manager Express.