HIARCS Chess Explorer Pro for PC: Windows 7, 8, 10 or 11 64 bit (all editions) 

HIARCS Chess Explorer Pro for Mac: macOS 10.14 Mojave or later, including Catalina, BigSur and Monterey

Please note a license to use HIARCS Chess Explorer Pro on one platform does not give access on the other platforms. For example a PC Windows license does not provide use on Mac OS. However, we offer very good discounted rates for those who want to purchase the other platform product. Please email hiarcs@hiarcs.com for details.