I've got OS X High Sierra running in Parallels on a Macbook running OS X High Sierra. Installation was successful with default options, using Shared Networking, and DHCP successfully gets an address. However, I can't ping the host. I can ping the guest from the host. No McAfee installed, no firewalls running.
ifconfig en0 looks like
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=2b<RXCSUM,TXCSUM,VLAN_HWTAGGING,TSO4>
ether 00:1c:42:85:01:47
inet6 fe80::8db:63e9:367:aa05%en0 prefixlen 64 secured scopeid 0x7
inet 192.168.64.3 netmask 0xffffff00 broadcast 192.168.64.255
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (1000baseT <full-duplex>)
status: active
pinging host from guest
$ ping 192.168.64.1
PING 192.168.64.1 (192.168.64.1): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
pinging guest from host
$ ping 192.168.64.3
PING 192.168.64.3 (192.168.64.3): 56 data bytes
64 bytes from 192.168.64.3: icmp_seq=0 ttl=64 time=0.395 ms
64 bytes from 192.168.64.3: icmp_seq=1 ttl=64 time=0.526 ms
64 bytes from 192.168.64.3: icmp_seq=2 ttl=64 time=0.531 ms
Any thoughts would be appreciated