System Requirements The Mastermind GT, LT and PBC editor can run on a Windows PC or a Macintosh running OS X. Windows: Windows 7 or later, 32 or 64-bit 2GB RAM One free USB port A USB cable that ends in a USB B connector, which is the square type that most printers use. Mac OS X: OS X 10.13 (High Sierra) or later, 64-bit only 2GB RAM One free USB port A USB cable that ends in a USB B connector, which is the square type that most printers use.