macOS Sierra requires at least a late 2009 iMac/MacBook or a 2010 MacBook Air/Pro/Mac mini.
Apple no longer supports macOS Sierra (10.12). No security updates have been issued since 2019. But if you need it for legacy hardware or old software: macossierra10126frenchiso
The ISO boots, but the keyboard outputs English/QWERTY instead of French/AZERTY. Solution: During the first setup wizard, carefully select Français as the input source. If missed, go to Préférences Système > Clavier > Sources d’entrée and add Français (AZERTY) . macOS Sierra requires at least a late 2009
Burning the installer to a DVD or creating a specific type of bootable USB. go to Préférences Système >