CSB (and Trellix before it) have been written to run on Windows operating systems.
There has never been a MAC version.
If you have Windows Emulation on the Mac, it MIGHT allow you to install CSB on the Mac. I do not have a Mac so can not try it out. Installing
Parallels or VMware on the Mac will allow you to install XP or Vista as "virtual machine". That windows installation should have all the capabilities of a windows machine, running windows OFFICE so I it might be possible to run CSB on that kind of environment too!