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Added M1 Mac support
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Sun Knudsen
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@ -12,9 +12,7 @@ Listed: true
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[](https://www.youtube.com/watch?v=ASXANpr_zX8 "How to spoof MAC address and hostname automatically at boot on macOS")
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> Heads-up: unfortunately this guide doesn’t work on Macs equipped with T2 chips running macOS Mojave. If that’s your case, consider upgrading to Catalina.
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> Heads-up: unfortunately this guide doesn’t work on Macs equipped with M1 processors (see [issue](https://github.com/sunknudsen/privacy-guides/issues/15)).
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> Heads-up: unfortunately, it is not possible to spoof MAC address on some Macs (see [issue](https://github.com/sunknudsen/privacy-guides/issues/15)).
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## Caveats
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@ -48,7 +46,23 @@ echo 'export PATH=$PATH:/usr/local/sbin' >> ~/.zshrc
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source ~/.zshrc
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```
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### Step 3: create `spoof.sh` script
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### Step 3: download [first-names.txt](./first-names.txt)
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This list includes the top 2048 most popular baby names from the [USA Social Security Administration](https://www.ssa.gov/oact/babynames/limits.html).
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```shell
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curl -o /usr/local/sbin/first-names.txt https://sunknudsen.com/static/media/privacy-guides/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/first-names.txt
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```
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### Step 4: download [mac-address-prefixes.txt](./mac-address-prefixes.txt)
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This list includes 768 Apple MAC address prefixes.
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```shell
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curl -o /usr/local/sbin/mac-address-prefixes.txt https://sunknudsen.com/static/media/privacy-guides/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/mac-address-prefixes.txt
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```
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### Step 5: create `spoof.sh` script
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```shell
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cat << "EOF" > /usr/local/sbin/spoof.sh
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@ -71,41 +85,27 @@ sudo scutil --set LocalHostName "$host_name"
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sudo scutil --set HostName "$host_name"
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printf "%s\n" "Spoofed hostname to $host_name"
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# Spoof MAC address of en0 interface
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# Turn on Wi-Fi interface
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networksetup -setairportpower en0 on
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# Spoof MAC address of Wi-Fi interface
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mac_address_prefix=$(sed "$(jot -r 1 1 768)q;d" $basedir/mac-address-prefixes.txt | sed -e 's/[^A-F0-9:]//g')
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mac_address_suffix=$(openssl rand -hex 3 | sed 's/\(..\)/\1:/g; s/.$//')
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mac_address=$(echo "$mac_address_prefix:$mac_address_suffix" | awk '{print toupper($0)}')
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sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport --disassociate
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sudo ifconfig en0 ether "$mac_address"
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printf "%s\n" "Spoofed MAC address of en0 interface to $mac_address"
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EOF
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```
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### Step 4: make `spoof.sh` executable
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### Step 6: make `spoof.sh` executable
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```shell
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chmod +x /usr/local/sbin/spoof.sh
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```
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### Step 5: download [first-names.txt](./first-names.txt)
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This list includes the top 2048 most popular baby names from the [USA Social Security Administration](https://www.ssa.gov/oact/babynames/limits.html).
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```shell
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curl -o /usr/local/sbin/first-names.txt https://sunknudsen.com/static/media/privacy-guides/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/first-names.txt
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```
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### Step 6: download [mac-address-prefixes.txt](./mac-address-prefixes.txt)
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This list includes 768 Apple MAC address prefixes.
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```shell
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curl -o /usr/local/sbin/mac-address-prefixes.txt https://sunknudsen.com/static/media/privacy-guides/how-to-spoof-mac-address-and-hostname-automatically-at-boot-on-macos/mac-address-prefixes.txt
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```
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### Step 7: create `local.spoof.plist` launch daemon
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This step is responsible for running `spoof.sh` every time your Mac boots.
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```shell
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cat << "EOF" | sudo tee /Library/LaunchDaemons/local.spoof.plist
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<?xml version="1.0" encoding="UTF-8"?>
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@ -127,7 +127,44 @@ cat << "EOF" | sudo tee /Library/LaunchDaemons/local.spoof.plist
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EOF
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```
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### Step 8: reboot and confirm hostname and MAC address have been spoofed
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### Step 8: create `spoof-hook.sh` script
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```shell
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cat << "EOF" > /usr/local/sbin/spoof-hook.sh
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#! /bin/sh
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# Turn off Wi-Fi interface
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networksetup -setairportpower en0 off
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EOF
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```
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### Step 9: make `spoof-hook.sh` executable
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```shell
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chmod +x /usr/local/sbin/spoof-hook.sh
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```
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### Step 10: make sure `com.apple.loginwindow` does not exist
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> Heads-up: if `com.apple.loginwindow` exists, one needs to backup user default carefully and consider using an abstraction that runs both current `LogoutHook` script and `/usr/local/sbin/spoof-hook.sh`.
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```console
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$ sudo defaults read com.apple.loginwindow
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2021-09-27 06:58:02.301 defaults[2267:25227]
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Domain com.apple.loginwindow does not exist
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```
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Domain com.apple.loginwindow does not exist
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👍
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### Step 11: configure user default (used to disable Wi-Fi interface at logout)
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```shell
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sudo defaults write com.apple.loginwindow LogoutHook "/usr/local/sbin/spoof-hook.sh"
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```
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### Step 12: reboot and confirm hostname and MAC address have been spoofed
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#### Spoofed hostname
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@ -150,7 +187,7 @@ $ networksetup -listallhardwareports | awk -v RS= '/en0/{print $NF}'
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9c:f4:8e:d6:2b:7d
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```
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“Spoofed hostname” is random and “Spoofed MAC address” doesn’t match “Hardware MAC address”?
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“Spoofed hostname” is random and “Spoofed MAC address” does not match “Hardware MAC address”?
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👍
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@ -158,9 +195,25 @@ $ networksetup -listallhardwareports | awk -v RS= '/en0/{print $NF}'
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## Want things back the way they were before following this guide? No problem!
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### Step 1: set computer name, local hostname and hostname
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### Step 1: delete files
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Replace `John` with a name to your liking.
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```shell
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rm /usr/local/sbin/first-names.txt
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rm /usr/local/sbin/mac-address-prefixes.txt
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rm /usr/local/sbin/spoof-hook.sh
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rm /usr/local/sbin/spoof.sh
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sudo rm /Library/LaunchDaemons/local.spoof.plist
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```
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### Step 2: delete user default
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```shell
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sudo defaults delete com.apple.loginwindow LogoutHook
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```
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### Step 3: set computer name, local hostname and hostname
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> Heads-up: replace `John` with your name.
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```shell
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sudo scutil --set ComputerName "John’s MacBook Pro"
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@ -168,20 +221,6 @@ sudo scutil --set LocalHostName "Johns-MacBook-Pro"
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sudo scutil --set HostName "Johns-MacBook-Pro"
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```
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### Step 2: set MAC address to default value
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Given MAC address spoofing is ephemeral, deleting the `/Library/LaunchDaemons/local.spoof.plist` launch daemon and rebooting will reset your MAC address to its default value.
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```shell
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sudo rm /Library/LaunchDaemons/local.spoof.plist
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```
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### Step 3: delete script and datasets
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```shell
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rm /usr/local/sbin/spoof.sh
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rm /usr/local/sbin/first-names.txt
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rm /usr/local/sbin/mac-address-prefixes.txt
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```
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### Step 4: reboot
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👍
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