Hi @Adrian710 ,
Adobe Campaign classic is windows only application. You cannot install the client/server on MAC OS. You can use Parallels with Windows OS if you wish to use it on a MAC.
Adobe Campaign Standard is a web-based solution that is accessible across windows/Mac via web browsers.
Let me know if you have more questions.
for ACS yes,
ACC is windows only so you need Parallel (paid) or Oracle VM (free) and install a windows VM on it.