DHCP lease files are incorrect on Big Sur as networking now uses OS-provided facilities. One must use `vmrun` to get the correct guest IP. See here for details: https://github.com/docker/machine/issues/4846 Fixed by https://github.com/docker/machine/pull/4847, which should apply here without much work. Ironic that Fusion 12.1 now includes this at commit aaccce5 (which can't work), as listed in acknowledgements.pdf: > `docker-machine-driver-vmware- aaccce554f6a23a80205520ade5b928d47ee9dec`