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Software Author(s):

  • wandersick

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This package was submitted (and approved) prior to automated virus scanning integration into the package moderation processs.

We recommend clicking the "Details" link to make your own decision on installing this package.


To install ChMac, run the following command from the command line or from PowerShell:


To upgrade ChMac, run the following command from the command line or from PowerShell:


To uninstall ChMac, run the following command from the command line or from PowerShell:


NOTE: This applies to both open source and commercial editions of Chocolatey.

1. Ensure you are set for organizational deployment

Please see the organizational deployment guide

  • Open Source or Commercial:
    • Proxy Repository - Create a proxy nuget repository on Nexus, Artifactory Pro, or a proxy Chocolatey repository on ProGet. Point your upstream to Packages cache on first access automatically. Make sure your choco clients are using your proxy repository as a source and NOT the default community repository. See source command for more information.
    • You can also just download the package and push it to a repository Download

3. Enter your internal repository url

(this should look similar to

4. Choose your deployment method:

choco upgrade chmac -y --source="'STEP 3 URL'" [other options]

See options you can pass to upgrade.

See best practices for scripting.

Add this to a PowerShell script or use a Batch script with tools and in places where you are calling directly to Chocolatey. If you are integrating, keep in mind enhanced exit codes.

If you do use a PowerShell script, use the following to ensure bad exit codes are shown as failures:

choco upgrade chmac -y --source="'STEP 3 URL'"

Write-Verbose "Exit code was $exitCode"
$validExitCodes = @(0, 1605, 1614, 1641, 3010)
if ($validExitCodes -contains $exitCode) {
  Exit 0

Exit $exitCode

- name: Ensure chmac installed
    name: chmac
    state: present
    source: STEP 3 URL

See docs at

chocolatey_package 'chmac' do
  action    :install
  version  ''
  source   'STEP 3 URL'

See docs at

    Name: chmac,
    Source: STEP 3 URL

Requires Otter Chocolatey Extension. See docs at

cChocoPackageInstaller chmac
   Name     = 'chmac'
   Ensure   = 'Present'
   Version  = ''
   Source   = 'STEP 3 URL'

Requires cChoco DSC Resource. See docs at

package { 'chmac':
  provider => 'chocolatey',
  ensure   => '',
  source   => 'STEP 3 URL',

Requires Puppet Chocolatey Provider module. See docs at

salt '*' chocolatey.install chmac version="" source="STEP 3 URL"

See docs at

5. If applicable - Chocolatey configuration/installation

See infrastructure management matrix for Chocolatey configuration elements and examples.

This package was approved by moderator mwallner on 11 Jul 2020.


Named after getmac and chmod, chmac is a command-line-interface (CLI) tool for Windows that changes or randomizes MAC addresses of specified network adapters, e.g. for a client device to reuse public Wi-Fi hotspot that has exceeded usage limit for the day (e.g. hotels, restaurants), or to enhance security.

An easy-to-use interactive console is available, alongside command-line parameters.

List of Features

  • Change MAC addresses on Windows manually or automatically on set intervals
  • Randomize MAC addresses for better security using public Wi-Fi
    • Generate new MAC addresses randomly based on a customizable list of organizationally unique identifiers (OUI)
  • Optionally leverage DevCon.exe to simply the process by automatically disabling and re-enabling network interface card (NIC)
    • ChMac also works without DevCon by showing the Network Connections folder when finished, so that users can manually disable and re-enable NIC for new settings to take effect
    • On first launch, users are guided to download DevCon with convenient automatic and manual options
  • Restore original MAC address
  • Rich return codes for scripting and other possibilities
  • Free and open-source software written in Windows batch language
  • Supports Windows 2000/XP/Vista/7/8/8.1/10 and Server 2000/2003/2008/2012/2016/2019
  • Portable by default. Optional installer enables chmac command globally

Getting Started

For interactive mode, simply run chmac.bat and follow on-screen instructions.

For command-line mode, refer to the below examples.

chmac.bat [/d dir][/l][/m address][/n id][/r][/help][/?]

chmac /l                     :: list available adapter IDs
chmac /n 1                   :: update network adapter #1 with randomized mac address numbers
chmac /m 00301812AB01 /n 2   :: update network adapter #2 with the new mac address: 00-30-18-12-AB-01
chmac /n 3 /r                :: restore adapter 3 to its original MAC
chmac /n 4 /a 20m            :: auto-change MAC per 20 minute
chmac /?                     :: shows short help. [/help] for long


$ErrorActionPreference = 'Stop';
$toolsDir   = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
$fileLocation = Join-Path $toolsDir 'Setup.exe'
$url        = ''

$packageArgs = @{
  packageName   = 'ChMac'
  unzipLocation = $toolsDir
  fileType      = 'exe'
  url           = $url
  file          = $fileLocation

  softwareName  = 'ChMac*'

  checksum      = 'e32d4181f31802330d0688587dcf968f'
  checksumType  = 'md5'

  silentArgs    = "/programfiles /unattendaz=1"
  validExitCodes= @(0)

Install-ChocolateyPackage @packageArgs
$ErrorActionPreference = 'Stop';
$packageArgs = @{
  packageName   = 'ChMac'
  softwareName  = 'ChMac*'
  fileType      = 'EXE'
  silentArgs    = "/programfiles /unattendAZ=1"
  validExitCodes= @(0)

$uninstalled = $false
[array]$key = Get-UninstallRegistryKey -SoftwareName $packageArgs['softwareName']

if ($key.Count -eq 1) {
  $key | % { 
    $packageArgs['file'] = "$($_.UninstallString)".Substring(0, $_.UninstallString.IndexOf(' /'))
    if ($packageArgs['fileType'] -eq 'MSI') {
      $packageArgs['silentArgs'] = "$($_.PSChildName) $($packageArgs['silentArgs'])"
      $packageArgs['file'] = ''

    Uninstall-ChocolateyPackage @packageArgs
} elseif ($key.Count -eq 0) {
  Write-Warning "$packageName has already been uninstalled by other means."
} elseif ($key.Count -gt 1) {
  Write-Warning "$($key.Count) matches found!"
  Write-Warning "To prevent accidental data loss, no programs will be uninstalled."
  Write-Warning "Please alert package maintainer the following keys were matched:"
  $key | % {Write-Warning "- $($_.DisplayName)"}

Log in or click on link to see number of positives.

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.

Version Downloads Last Updated Status

This package has no dependencies.

Discussion for the ChMac Package

Ground Rules:

  • This discussion is only about ChMac and the ChMac package. If you have feedback for Chocolatey, please contact the Google Group.
  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
  • The maintainers of this Chocolatey Package will be notified about new comments that are posted to this Disqus thread, however, it is NOT a guarantee that you will get a response. If you do not hear back from the maintainers after posting a message below, please follow up by using the link on the left side of this page or follow this link to contact maintainers. If you still hear nothing back, please follow the package triage process.
  • Tell us what you love about the package or ChMac, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
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