I have a VM (on Fusion 12.2.1, Big Sur 11.6.2) that is causing this with 2 interfaces connected to the predefined ‘Share with my Mac’. When I move the first interface to the bridged wifi it all works fine, the vmnet-natd stays healthy and everything works as expected. Because I ran to all kind of other issues in relation to my local restricted network behind this bridged wifi config, I then changed it back to the ‘Share with my Mac’. And, unexpectedly the vmnet-natd is still behaving nicely en keeps behaving nicely. I suspect the vmnet-natd issue is related to using the two ‘Share with my Mac’-interfaces and some timing or interference with the natd process.
