OsX is not free, you still need to buy a Mac.
As for MSFT , they are a software company,not sure what they can do about Windows price ,which will never be free.
Want free stuff? use Linux.
I will give that driver support for wifi cards may make some computers more awkward than others. It's very rare these days that any common device other than a wifi card or a just this week released graphics card causes problems any more.
(As an aside, how do you escape asterisks here?)