NOTE: Looks like Apple killed tis in Sonoma for Ethernet but the following works for Wi-Fi.

randommac.sh

#!/bin/bash

# v 2.0 
# https://gist.github.com/mbierman/03b2a962ac04963ef5bbc8354d0ed5d1
# 2022 mbierman

sleep="${1:-6}"
regex="^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$"
getmac () {
	rnd=$(openssl rand -hex 6 | sed 's/\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)/\1:\2:\3:\4:\5:\6/')
	echo -e  "What is the mac address want to set the mac\n\nexample: CA:49:63:9F:78:27\n\nLeave blank to get one generated for you."
	read tmp
	mac1=${tmp:=$rnd}

	mac=$(echo $mac1 | tr '[:lower:]' '[:upper:]')
	
	if [[ $mac =~ $regex ]] ; then
		comp=true
		echo -e "\n\n Using $mac...\n"
	else
		comp=false
		echo false	
	fi 
}

until [ "$comp" = "true" ]
do
	getmac
done

getAdapter () {
echo "What is the adapter you want to set the mac for [en0,en1, etc. use 'ifconfig' if you don't know]"
read adapter
}
until [ "$adapter" ] 
do
	getAdapter
done

type=$(ifconfig $adapter | grep baseT)
if [ "$type" ]; then
	echo "got Ethernet"
	type="Ethernet"
	echo -e "\nSorry, macOS doesn't allow spoofing mac for Ethernet.\n\n" 
	exit
else
	echo "got Wi-Fi"
	type="Wi-Fi"
fi

read -p "Is $adapter $type (y|n) ? " -n 1 -r
if [[ ! $REPLY =~ ^[Yy]$ ]];  then
	echo "Exiting. Run again"
	exit
fi 

# sudo ifconfig $adapter down && sleep $sleep  && sudo ifconfig $adapter up && \
# sudo ifconfig $adapter ether $mac && sudo networksetup -detectnewhardware

sudo networksetup -setairportpower $adapter off 
sleep 2 
networksetup -setairportpower $adapter on
sudo ifconfig $adapter ether $mac
sudo ipconfig set $adapter DHCP

The Wifi Device's information is as below: (Attached next reply) When I used the ifconfig to change the MAC address, it got the error message. (Attached next reply) Michael Bierman ***@***.***> 於 2024年5月13日 週一 上午5:24寫道：

…

***@***.**** commented on this gist. ------------------------------ It's not woking on MACOS sonoma 14.4.1 (23E224), MacBook Air, Apple M1. It showed the error message: "ifconfig: ioctl (SIOCAIFADDR): Can't assign requested address" What is the interface of your Wi-Fi adapter? — Reply to this email directly, view it on GitHub <https://gist.github.com/mbierman/03b2a962ac04963ef5bbc8354d0ed5d1#gistcomment-5054576> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC24BFPNFJ3LVTA6H4MTZ4DZB7MZDBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTCOBQGE4TKNRSU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .

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Attached the screenshots:

Looks like Apple killed this in Sonoma. There may be no practical workaround. If I find one, I'll update.

still trying to get it, what's the difference between this simple action that worked couple days ago for me:

1. disconnect from wifi network (do not turn off wifi adapter)
2. openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'
3. sudo ifconfig en0 ether xx:xx:xx:xx:xx:xx
4. connect back to local wlan

and this script???? o_0

1. disconnect from wifi network (do not turn off wifi adapter)
   This is very useful for me!