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After download, the installer appears in as Install macOS Sierra.app . 4. Creating a bootable ISO from the official installer Once you have the .app installer, follow these steps to create an ISO suitable for virtualization or USB burning. Step 1 – Create a blank disk image (read/write) Open Terminal and run:
After download, the installer appears in as Install macOS Sierra.app . 4. Creating a bootable ISO from the official installer Once you have the .app installer, follow these steps to create an ISO suitable for virtualization or USB burning. Step 1 – Create a blank disk image (read/write) Open Terminal and run: