Dear Andrea,
Hello, this is Bandisoft.
"Bandizip for Windows" and "Bandizip for macOS" are individual products, developed by different teams and subject to different license policies. Making a purchase of Bandizip Professional Edition (for Windows) does not mean that you can use Bandizip for macOS as well, and the same thing is true in reverse. We would like to inform you that you have to purchase each product separately in order to use Bandizip PRO (Win) and Bandizip (Mac) both.
Thank you for your interest in Bandizip.
Best regards,