Does macOS Sierra do mac address randomisation? I know that iOS does it
Natively, no, but you can change the MAC address yourself.  I think it reverts upon reboot though.

The command is sudo ifconfig &lt;interface&gt; ether &lt;new mac address&gt;

For example, sudo ifconfig en0 ether 12:34:56:12:34:56

You may need to toggle the interface as well sudo ifconfig en0 down and up

As per this site (https://blog.macsales.com/37428-tech-tip-finding-and-changing-your-mac-address-in-os-x) you can make a random MAC like this 

openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'