As a Mac user, my concern was having to buy a new Win laptop just to use this software. If you meet the min recommended specs for processor speed and RAM, even old hardware and OS will do. I’m running Win 7 (Service Pack 1) on a 10 year old Thinkpad, and the program works great. No lag.
https://www.amazon.com/Laser-Ammo-Smokeless-Range-Simulator/dp/B00VHE70I8

