Movies and music are OS independent, thus no special website is required.
But as you haven't read the Forum Rules, here is an excerpt, that concerns your request. Or are you talking about legal downloads? Steam offers some games for Mac OS X, iTunes and Amazon offer music and movies,
www.versiontracker.com and
www.macupdate.com offer software downloads. And MRoogle offers a portal to a variety of FAQs.
Warez/Serials/Keys.
Do not post software serial numbers or keys or refer people to specific websites, software, or techniques whose purpose is to break or bypass software licensing methods, distribute cracks, or obtain or use commercial software or media in violation of its license and/or for copyright violation. Do not ask for or give such help.
from
https://macrumors.zendesk.com/hc/en-us#Things_Not_to_Do
