macos-sierra-10.12.6-french.iso is an ISO image containing macOS Sierra 10.12.6 with French language localization. It can be used to create a bootable installer or to run the installer in a virtual machine. Important points:
This is safer than downloading a pre-made ISO from an unknown source. macos-sierra-10.12.6-french.iso
Apple distributes macOS via the Mac App Store as .app bundles, not ISOs. An ISO is a disk image format for optical discs or virtual machines. Therefore, any file named exactly macos-sierra-10.12.6-french.iso is either: macos-sierra-10
Note : Si vous avez l'ISO, vous devrez peut-être d'abord copier l'application "Install macOS Sierra.app" dans votre dossier Applications à partir de l'ISO monté. Apple distributes macOS via the Mac App Store as
Always build your own ISO using the method above. It is legal, safe, and ensures you get a clean French localization. If you must download, verify the SHA-256 hash against known good values and never run unknown executables.