Origin: https://github.com/sunknudsen/privacy-guides/tree/master/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos

spoof-mac.sh

# Origin: https://github.com/sunknudsen/privacy-guides/tree/master/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos

set -e
set -o pipefail

export LC_CTYPE=C

basedir=$(dirname "$0")

# Spoof computer name
first_name=$(sed "$(jot -r 1 1 2048)q;d" $basedir/first-names.txt | sed -e 's/[^a-zA-Z]//g')
model_name=$(system_profiler SPHardwareDataType | awk '/Model Name/ {$1=$2=""; print $0}' | sed -e 's/^[ ]*//')
computer_name="$first_name’s $model_name"
host_name=$(echo $computer_name | sed -e 's/’//g' | sed -e 's/ /-/g')
sudo scutil --set ComputerName "$computer_name"
sudo scutil --set LocalHostName "$host_name"
sudo scutil --set HostName "$host_name"
printf "%s\n" "Spoofed hostname to $host_name"

# Spoof MAC address of Wi-Fi interface
mac_address_prefix=$(sed "$(jot -r 1 1 768)q;d" $basedir/mac-address-prefixes.txt | sed -e 's/[^A-F0-9:]//g')
mac_address_suffix=$(openssl rand -hex 3 | sed 's/\(..\)/\1:/g; s/.$//')
mac_address=$(echo "$mac_address_prefix:$mac_address_suffix" | awk '{print toupper($0)}')
networksetup -setairportpower en0 on
sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport --disassociate
sudo ifconfig en0 ether "$mac_address"
printf "%s\n" "Spoofed MAC address of en0 interface to $mac_address"