Altium Designer by Altium Limited is a piece of software that was created to help you design PCB (printed circuit boards). Unfortunately, there is no version of Altium Designer for Mac available on the market, so, you might want to try other applications to help you with your designs. This list contains some of the alternatives to Altium Designer for Mac.
Feel free to add any alternative to Altium Designer for Mac that you know of.
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This answer is misleading.
I use Altium Designer on my Mac, 12-hours a day, 5-7 days a week, running Windows7 and Windows10 in a Virtual Machine (VMWare). Sure, VM is like $60, and Windows is like $200, but I have ZERO blue screens of death running Windows in my VM, used to what was a daily-event running Altium on my PC. I have never considered going back to a PC once in the last 5-6 years.