You need Windows. There are options to put Windows on your Mac, such as Parallels or Bootcamp. Myself, I don't see a reason to run a turd on my fantastic Mac, so I went and bought a cheap POS Asus.
I don't know if any of the tuners work on mac. I've tried a few and they were all windows. I wish they would work with mac. Luckily I have a pc from a few years ago. I only use it when I need to do something with tuning
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Cummins Diesel Forum
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A forum community dedicated to all things Cummins Diesel! Originally founded for owners and enthusiasts of Cummins powered Dodge pickups, the Cummins Forum has expanded to include ALL Cummins Engine applications! Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more!