the macOS Sierra installer InstallOS.dmg from Apple. Open the Terminal on your Mac.
The resulting file will have a .cdr extension. Simply rename it to .iso (e.g., Sierra.cdr to Sierra.iso ). mac os sierra 10.12 6 iso download
Paste the official Apple server download link for Sierra: https://cdn-apple.com Download the InstallOS.dmg file to your computer. the macOS Sierra installer InstallOS
hdiutil attach /tmp/Sierra.dmg -noverify -mountpoint /Volumes/SierraISO Use code with caution. Simply rename it to
Older macOS versions like Sierra are often distributed as DMG files that are not bootable by themselves. To create a bootable image, you must use Terminal.
If you have a machine older than these specifications, your only route to experiencing Sierra is through virtualization, which we will cover later.
hdiutil create -o /tmp/Sierra -size 5000m -layout SPUD -fs HFS+J Use code with caution.