The license codes are valid on both the Macintosh and Windows versions of the software. If you own both a Macintosh and a Windows computer, you do not need to purchase 2 licenses. You only need to purchase a single license. You may use the same license on both computers as long as you will only use one computer at a time. Here’s how you do it:

1. Download the Macintosh version and install it on your Mac.
2. Download the Windows version and install it on your Windows machine.
3. Purchase a single user license.
4. Install the license on both the Macintosh and Windows machines.

Note that you can only use one machine at a time. You may not use both machines simultaneously as that would be a violation of the End User License Agreement.