MacOS – How to set up routing tables on OS X to redirect VPN traffic

I am trying to setup route table on my OS X machine so regular internet traffic doesn't go through VPN but only specific destinations will be targeted via VPN.

When I connect to VPN it creates new 'default' route for interface 'jnc0' destination which redirects all the traffic to VPN.

netstat -nr
Routing tables

Internet:

Destination     Gateway        Flags      Refs     Use     Netif Expire
default         10.1.1.1       UGSc       36       65      jnc0
default         192.168.0.1    UGScI      20       0       en1

Is it possible to set priority so all traffic goes via default 192.168.0.1 en1 instead of default 10.1.1.1 jnc0 ?

I have script for Ubuntu which creates routing table but I am not sure how to adjust it for OS X.

Here is the script:

SET_PRIORITY=$(sudo ip rule  | grep -c $ROUTE_TABLE_NAME)

if [ $SET_PRIORITY -eq 0 ]; then
    sudo ip rule add from all lookup $ROUTE_TABLE_NAME prio 1000 
fi 

sudo ip route flush table $ROUTE_TABLE_NAME

sudo ip route add default via $ROUTER_IP dev $LOCAL_IFACE metric 0 table $ROUTE_TABLE_NAME

sudo ip route add default via $VPN_IP dev $VPN_IFACE metric 1 table $ROUTE_TABLE_NAME 

sudo ip route add 172.0.0.1/16 via $VPN_IP dev $VPN_IFACE table $ROUTE_TABLE_NAME

When I try to execute:

sudo ip rule add from all lookup $ROUTE_TABLE_NAME prio 1000 

I get sudo: ip: command not found.

Also when I try to execute:

sudo rule add from all lookup $ROUTE_TABLE_NAME prio 1000

it doesn't work either with error sudo: rule: command not found.

Here is the code:

sudo ip route flush table $ROUTE_TABLE_NAME
sudo: ip: command not found

sudo route add default via $ROUTER_IP dev $LOCAL_IFACE metric 0 table $ROUTE_TABLE_NAME
route: bad address: via

sudo route add 172.0.0.1/16 via $VPN_IP dev $VPN_IFACE table $ROUTE_TABLE_NAME
route: bad address: via

I would appreciate any help and guidance.