# Legacy macOS: Offline Method

This method allows us to download full installers from Apple, however is limited to the following macOS versions:

  • Lion (10.7)
  • Mountain Lion (10.8)
  • Yosemite (10.10)
  • El Capitan (10.11)
  • Sierra (10.12)


Mavericks (10.9) is not available with this method. See Legacy macOS: Online Method for this version.

To start, go to one of the following links:

Download your desired version and a .dmg file should be provided, with a .pkg inside.

Depending on what OS you're on, you can install this package, which will provide you with a "Install (macOS version).app" and head to Setting up the installer; however if you receive this error:

Your SMBIOS is too new to run that version natively (even if you're trying to make a USB for a different computer, it still checks). This means we'll need to manually extract the installer.

# Extracting the Installer

To start, grab the InstallMacOSX/InstallOS.dmg and mount it:

Next, let's open up a Terminal window and extract the package to a folder on our desktop. This may take a while.

  • For Lion and Mountain Lion:
cd ~/Desktop
pkgutil --expand-full "/Volumes/Install Mac OS X/InstallMacOSX.pkg" OSInstaller
  • For Yosemite and El Capitan:
cd ~/Desktop
pkgutil --expand-full "/Volumes/Install OS X/InstallMacOSX.pkg" OSInstaller
  • For Sierra:
cd ~/Desktop
pkgutil --expand-full "/Volumes/Install macOS/InstallOS.pkg" OSInstaller

Next, run the following (one at a time):

  • Lion:
cd OSInstaller/InstallMacOSX.pkg
mv InstallESD.dmg "Payload/Install Mac OS X Lion.app/Contents/SharedSupport/"
mv "Payload/Install Mac OS X Lion.app" /Applications
  • Mountain Lion:
cd OSInstaller/InstallMacOSX.pkg
mv InstallESD.dmg "Payload/Install OS X Mountain Lion.app/Contents/SharedSupport/"
mv "Payload/Install OS X Mountain Lion.app" /Applications
  • Yosemite:
cd OSInstaller/InstallMacOSX.pkg
mv InstallESD.dmg "Payload/Install OS X Yosemite.app/Contents/SharedSupport/"
mv "Payload/Install OS X Yosemite.app" /Applications
  • El Capitan:
cd OSInstaller/InstallMacOSX.pkg
mv InstallESD.dmg "Payload/Install OS X El Capitan.app/Contents/SharedSupport/"
mv "Payload/Install OS X El Capitan.app" /Applications
  • Sierra:
cd OSInstaller/InstallOS.pkg
mv InstallESD.dmg "Payload/Install macOS Sierra.app/Contents/SharedSupport/"
mv "Payload/Install macOS Sierra.app" /Applications

# Once you're finished, you can head to Setting up the installer