pass out proto tcp from  some.domain.com port 8000 to 162.251.150.150 port 80
nat pass on lo0 inet proto tcp from any to some.domain.com port 8000 -> 162.251.150.150 port 80

sudo iptables -t nat -A OUTPUT -p tcp --dport 8000 -d some.domain.com  -j DNAT --to-destination 162.251.150.150:80