NB: The K5 Breathe-Link software is NOT yet compatible with macOS Big Sur 11.01
Software is PC compatible (except for Windows 10 S for which it is not compatible). It is also MAC compatible, working on the following MAC OS. Mac software will only work for x86_64 bit architecture.
macOS Monterey12.0 and above
macOS Catalina: 10.15.7 Beta Release
macOS Mojave: 10.14.6 Beta Release
macOS High Sierra: 10.13.6
macOS Sierra: 10.12.6
OS X El Capitan: 10.11.6
OS X Yosemite: 10.10.5
OS X Mavericks: 10.9.5