mbierman/randommac.sh

phush0 · 2022-09-16T07:47:20Z

no change

+ sleep=2
+ regex='^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$'
+ '[' '' = true ']'
+ getmac
++ openssl rand -hex 6
++ sed 's/\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)/\1:\2:\3:\4:\5:\6/'
+ rnd=5b:a2:35:51:81:de
+ 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.'
What is the mac address want to set the mac

example: CA:49:63:9F:78:27

Leave blank to get one generated for you.
+ read tmp

+ mac1=5b:a2:35:51:81:de
++ echo 5b:a2:35:51:81:de
++ tr '[:lower:]' '[:upper:]'
+ mac=5B:A2:35:51:81:DE
+ [[ 5B:A2:35:51:81:DE =~ ^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$ ]]
+ comp=true
+ echo -e '\n\n Using 5B:A2:35:51:81:DE...\n'


 Using 5B:A2:35:51:81:DE...

+ '[' true = true ']'
+ '[' '' ']'
+ getAdapter
+ echo 'What is the adapter you want to set the mac for [en0,en1, etc. use '\''ifconfig'\'' if you don'\''t know]'
What is the adapter you want to set the mac for [en0,en1, etc. use 'ifconfig' if you don't know]
+ read adapter
en8
+ '[' en8 ']'
++ ifconfig en8
++ grep baseT
+ type=
+ '[' '' ']'
+ echo 'got Wi-Fi'
got Wi-Fi
+ type=Wi-Fi
+ read -p 'Is en8 Wi-Fi (y|n) ? ' -n 1 -r
Is en8 Wi-Fi (y|n) ? y+ [[ ! y =~ ^[Yy]$ ]]
+ sudo ifconfig en8 down
+ sleep 2
+ sudo ifconfig en8 up
+ sudo ifconfig en8 ether 5B:A2:35:51:81:DE
ifconfig: ioctl (SIOCAIFADDR): Can't assign requested address

phush0 · 2022-09-16T07:48:18Z

also I think grep baseT is not correct as all adapters are wifi in this way

mbierman · 2022-09-16T07:55:22Z

@phush0 "baseT" should never be on Wi-Fi. It should be an indicator of Ethernet.

Try the same code but add this:

randommac.sh 1

Note Ethernet

bigmac:bin michael$ ifconfig en0
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	media: autoselect (1000baseT <full-duplex>)
	status: active

Note Wi-FI

bigmac:bin michael$ ifconfig en1
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=6463<RXCSUM,TXCSUM,TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
	ether 
	inet6  prefixlen 64 secured scopeid 0xc 
	inet 192.168.0.41 netmask 0xffffff00 broadcast 192.168.0.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active

phush0 · 2022-09-16T07:57:31Z

nope, same error

mbierman · 2022-09-16T08:06:51Z

@phush0 so I think this is a race issue. I think it will depend on how fast your machine tries to assign an IP to your adapter. Try incrementing until you find a number that works.

randommac.sh 3 if that doesn't work
randommac.sh 4...

I bet it will be consistent for your machine. ">=4" worked for me.

FASHION399 · 2022-09-16T08:20:00Z

@mbierman

+ regex='^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$'
+ '[' '' = true ']'
+ getmac
++ openssl rand -hex 6
++ sed 's/\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)/\1:\2:\3:\4:\5:\6/'
+ rnd=83:6b:07:c1:b9:3f
+ echo -e 'What is the mac address want to set the mac\n\nexample: 4C:77:CB:9A:18:89\n\nLeave blank to get one generated for you.'
What is the mac address want to set the mac

example: 4C:77:CB:9A:18:89

Leave blank to get one generated for you.
+ read tmp
4C:77:CB:9A:18:89
+ mac1=4C:77:CB:9A:18:89
++ echo 4C:77:CB:9A:18:89
++ tr '[:lower:]' '[:upper:]'
+ mac=4C:77:CB:9A:18:89
+ [[ 4C:77:CB:9A:18:89 =~ ^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$ ]]
+ comp=true
+ echo -e '\n\n Using 4C:77:CB:9A:18:89...\n'


 Using 4C:77:CB:9A:18:89...

+ '[' true = true ']'
+ '[' '' ']'
+ getAdapter
+ echo 'What is the adapter you want to set the mac for [en0,en1, etc. use '\''ifconfig'\'' if you don'\''t know]'
What is the adapter you want to set the mac for [en0,en1, etc. use 'ifconfig' if you don't know]
+ read adapter
en0
+ '[' en0 ']'
++ ifconfig en0
++ grep baseT
+ type=
+ '[' '' ']'
+ echo 'got Wi-Fi'
got Wi-Fi
+ type=Wi-Fi
+ read -p 'Is en0 Wi-Fi (y|n) ? ' -n 1 -r
Is en0 Wi-Fi (y|n) ? y+ [[ ! y =~ ^[Yy]$ ]]
+ sudo ifconfig en0 down
Password:
+ sleep 2
+ sudo ifconfig en0 up
+ sudo ifconfig en0 ether 4C:77:CB:9A:18:89
ifconfig: ioctl (SIOCAIFADDR): Can't assign requested address

ifconfig

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
	inet 127.0.0.1 netmask 0xff000000 
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
anpi2: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 7a:12:6c:77:28:17 
	inet6 fe80::7812:6cff:fe77:2817%anpi2 prefixlen 64 scopeid 0x4 
	nd6 options=201<PERFORMNUD,DAD>
	media: none
	status: inactive
anpi1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 7a:12:6c:77:28:16 
	inet6 fe80::7812:6cff:fe77:2816%anpi1 prefixlen 64 scopeid 0x5 
	nd6 options=201<PERFORMNUD,DAD>
	media: none
	status: inactive
anpi0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 7a:12:6c:77:28:15 
	inet6 fe80::7812:6cff:fe77:2815%anpi0 prefixlen 64 scopeid 0x6 
	nd6 options=201<PERFORMNUD,DAD>
	media: none
	status: inactive
en4: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 7a:12:6c:77:28:f5 
	nd6 options=201<PERFORMNUD,DAD>
	media: none
	status: inactive
en5: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 7a:12:6c:77:28:f6 
	nd6 options=201<PERFORMNUD,DAD>
	media: none
	status: inactive
en6: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether 7a:12:6c:77:28:f7 
	nd6 options=201<PERFORMNUD,DAD>
	media: none
	status: inactive
en1: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	options=460<TSO4,TSO6,CHANNEL_IO>
	ether 36:20:31:12:2c:c0 
	media: autoselect <full-duplex>
	status: inactive
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	options=460<TSO4,TSO6,CHANNEL_IO>
	ether 36:20:31:12:2c:c4 
	media: autoselect <full-duplex>
	status: inactive
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	options=460<TSO4,TSO6,CHANNEL_IO>
	ether 36:20:31:12:2c:c8 
	media: autoselect <full-duplex>
	status: inactive
ap1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether be:d0:74:4a:0e:68 
	media: autoselect
	status: inactive
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=6463<RXCSUM,TXCSUM,TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
	ether ca:49:63:9f:78:27 
	inet6 fe80::14d9:a7eb:85d7:1434%en0 prefixlen 64 secured scopeid 0xe 
	inet 192.168.1.103 netmask 0xffffff00 broadcast 192.168.1.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
	ether 36:20:31:12:2c:c0 
	Configuration:
		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
		root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
		ipfilter disabled flags 0x0
	member: en1 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 10 priority 0 path cost 0
	member: en2 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 11 priority 0 path cost 0
	member: en3 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 12 priority 0 path cost 0
	nd6 options=201<PERFORMNUD,DAD>
	media: <unknown type>
	status: inactive
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether de:84:39:6d:57:b5 
	inet6 fe80::dc84:39ff:fe6d:57b5%awdl0 prefixlen 64 scopeid 0x10 
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=400<CHANNEL_IO>
	ether de:84:39:6d:57:b5 
	inet6 fe80::dc84:39ff:fe6d:57b5%llw0 prefixlen 64 scopeid 0x11 
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
	inet6 fe80::538e:e939:a9fe:f117%utun0 prefixlen 64 scopeid 0x12 
	nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
	inet6 fe80::d77d:71a7:334:f09d%utun1 prefixlen 64 scopeid 0x13 
	nd6 options=201<PERFORMNUD,DAD>
utun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1000
	inet6 fe80::ce81:b1c:bd2c:69e%utun2 prefixlen 64 scopeid 0x14 
	nd6 options=201<PERFORMNUD,DAD>
utun3: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
	inet6 fe80::78f8:4e9f:d0f3:1fb3%utun3 prefixlen 64 scopeid 0x15 
	nd6 options=201<PERFORMNUD,DAD>
utun4: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
	inet6 fe80::6f5e:6fba:9e7d:b881%utun4 prefixlen 64 scopeid 0x16 
	nd6 options=201<PERFORMNUD,DAD>

phush0 · 2022-09-16T08:20:21Z

well script is working only with original adapter from Apple. If I try to change mac on the dock adapter it is not working. So it sounds like Apple fault.

mbierman · 2022-09-16T08:26:10Z

@phush0 which one is failing? en8?

mbierman · 2022-09-16T08:27:00Z

@FASHION399 please try the new version.

phush0 · 2022-09-16T08:27:25Z

yep en8, I tried and Dell one on en9 with same fail result

mrrobotbot · 2023-03-16T16:50:32Z

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

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

and this script???? o_0

mrrobotbot · 2023-03-16T16:51:48Z

the main difference I see is in openssl generator (syntax is a little bit different)

acidos · 2024-02-13T23:03:50Z

This is the only script that worked for me on MacStudio Wifi / Sonoma. I will try on Macbook Pro.
Thanks a lot and please keep it alive.

alii · 2024-04-01T16:08:12Z

Thanks this is working great for en0 wi-fi!

Brenex · 2024-04-16T15:55:53Z

This script doesn't work for some people because when it runs "sudo ifconfig $adapter up", it auto-associates with a known SSID if a known SSID is found. The wifi adapter needs to be on and not associated for it to work. That's why the following step works, "disconnect from wifi network (do not turn off wifi adapter)".

blueDesert · 2024-05-12T13:00:24Z

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"

mbierman · 2024-05-12T21:19:42Z

This script doesn't work for some people because when it runs "sudo ifconfig $adapter up", it auto-associates with a known SSID if a known SSID is found. The wifi adapter needs to be on and not associated for it to work. That's why the following step works, "disconnect from wifi network (do not turn off wifi adapter)".

I don’t quite follow. Can you explain what you mean?

mbierman · 2024-05-12T21:24:13Z

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?

blueDesert · 2024-05-13T15:18:56Z

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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blueDesert · 2024-05-13T15:21:43Z

Attached the screenshots:

mbierman · 2024-05-16T03:52:46Z

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

leonardoyhl · 2024-06-18T09:52:37Z

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

disconnect from wifi network (do not turn off wifi adapter)

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

sudo ifconfig en0 ether xx:xx:xx:xx:xx:xx

connect back to local wlan

and this script???? o_0

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

	#!/bin/bash

	# v 1.0.2
	# https://gist.github.com/mbierman/03b2a962ac04963ef5bbc8354d0ed5d1
	# 2022 mbierman

	sleep="${1:-5}"
	regex="^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$"
	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"
	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

mbierman/randommac.sh

phush0 commented Sep 16, 2022

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mbierman/randommac.sh

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