Troubleshooting: If the download is only 22 MB instead of 5 GB, you have downloaded the stub installer. Delete it and use Method 1 or Method 3.
What are you currently using to perform the download?
If you need help troubleshooting a specific installation error, let me know: download macos 1012 sierra full
Type Y to confirm that you want to erase the volume, then press .
You have three options once the is ready: Troubleshooting: If the download is only 22 MB
Choose from the macOS Utilities window to erase your internal drive if you want a fresh start.
Type the following command (copy-paste exactly): If you need help troubleshooting a specific installation
Release the Option key when you see the Startup Manager screen showing available boot drives.
Apple hosts a direct link to the disk image file ( .dmg ) for macOS Sierra on their servers.
This process extracts a file named directly into your Applications folder. Step 3: Create a Bootable USB Installer (Optional)