Can a 2 computer subscription use a Mac & PC?
Yes, but only by a single user that has the subscription and not at the same time.
I've moved this from the Using the Community forum (which is the forum for issues using the forums) to the Account, Payment, & Plan forum.
you can install the cc desktop app from here https://creative.adobe.com/products/creative-cloud on as many computers (mac and pc) as you own and use it to install all (or some, if you want) of your cc subscription programs.
the only (insignificant for internet connect computers) limitation is that you can sign-in (and therefore start your adobe programs) on, at most, two computers at any one time. because you can sign out from either (or both) signed-in computers using a 3rd computer, this could not (imo) be easier.