Install spoof-mac with the terminal command: $ brew install spoof-mac
.
Then follow the instructions at https://github.com/feross/SpoofMAC#startup-installation-instructions to randomize your MAC address on computer startup:
# Download the startup file for launchd
curl https://raw.githubusercontent.com/feross/SpoofMAC/master/misc/local.macspoof.plist > local.macspoof.plist