To obtain and use a macOS Sierra 10.12.6 French ISO , you typically need to download the official installer from Apple and then convert it into an ISO format yourself, as Apple does not distribute "French-only" ISOs—the installer is inherently multilingual. Apple Support 1. Download the Official Installer
To create or obtain a French version of the macos-sierra-10.12.6-french.iso macos-sierra-10.12.6-french.iso
If you cannot create your own, these are the safest sources for a pre-made macos-sierra-10.12.6-french.iso: To obtain and use a macOS Sierra 10
hdiutil attach /tmp/SierraFrench.dmg -noverify -mountpoint /Volumes/SierraFrench macos-sierra-10.12.6-french.iso
: If you are using Sierra for a virtual machine (like VirtualBox), you must manually convert the downloaded Install macOS Sierra.app tobiwashere.de Solid Text & Compatibility