Iptables equivalent command in OSX Need to do dscp marking on a mac machine

Here is iptables command I use on linux box

iptables -t mangle -A OUTPUT -p tcp -m tcp -j DSCP --set-dscp 0x10


What's the iptables equivalent in OSX for above command?
The "equivalent" of iptables on macOS is pf (packet filter). Refer to the manual page for the configuration file here:

https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man5/pf.conf.5.html

In this case you want to use the "tos" option, as this is the way you set the QoS parameters similar to your --set-dscp option for iptables.

The configuration line could look something like this:

scrub out on $WAN proto tcp set-tos 0x10