I'm running Mac version 1. 16. 4 of MakeMKV on my iMac 2017 with MacOS Big Sur, i5 chip, 16GB RAM. It takes, like, a couple hours to rip a Blu-Ray disc using my Samsung Blu-Ray optical drive - but I couldn't do it at all otherwise. It appears to work perfectly and is easy to use. I'm still in trial mode but plan to purchase.