I think lots of domainers on this forum are obsessed with tm issues. Not being an expert on subject, they damage every discussion by the tm remarks and hurt the legit domain names.
Yes, the name uses "mac", but it legitimate name for a site that will be producing/selling/distributing etc. third party apps for mac and mac would be happy for somebody do that work. So how would you name a project that produces apps for mac? apps-for-u-know-who.com?
Anyway, if any domain is used in bad faith, there can be issues.