Hot! Download Mac Os Sierra 10.12 6 Dmg -

Use the bootable USB method described above. Do not attempt a network recovery install.

If your goal is to run modern browsers (Chrome, Firefox) or development tools (Xcode, Node.js), Sierra is outdated. Use this only for legacy hardware or specific software dependencies. Download Mac Os Sierra 10.12 6 Dmg

If you downloaded the DMG to perform a clean install, you'll need to convert it into a bootable USB drive (at least 8GB or 16GB recommended). How to download and install macOS - Apple Support Use the bootable USB method described above