There is no plan and probably won't be any plan to make the client console of Campaign Classic available for Mac.
There are a few workarounds to make it work but know that they are not supported, hence any problem you encounter with one of the following method will be only your responsibility:
Using a Windows virtual machine on which you'd install the Windows console.
Using a parallel Windows installation on your Mac.
There are software that allow to install windows programs on a mac, requiring a few tweaks but eventually working.
With that said, Campaign Standard is browser-based, so if you have a way to use Campaign Standard (if you purchased this product or Campaign Prime to connect Classic and Standard), you can use ACS on any machine.