Even though the Navi 21 hasn't been released yet, VideoCardz reports references to the Navi 31 have already been found in Apple's macOS 11 "Big Sur" operating system. Not a lot to go on about, but it seems to confirm that future Apple Mac computers will feature third-generation RDNA based GPUs from AMD.
Apple introduced the new macOS during the WWDC conference earlier this week. This is the first OS to support Apple’s own ARM-based Silicon. HardwareLeaks today reported that the macOS 11 GPU drivers already contain references to Navi 31, which basically confirms that Apple and AMD will collaborate to deliver high-end graphics to macOS users.