[hellofunk]

This makes no sense since OSX is certainly capable of the same level of graphic performance as any other OS (some would say it has even more powerful low-level tools now that Metal is available), so there must be something else going on in his setup that is causing a problem. As others have noted, possibly the drivers, but more likely he's not using the Mac's API to guarantee GPU rendering vs software rendering, or other fairly small settings that can lead to a big difference.