macOS utility to create and manage disk images.
# To mount an image:
hdiutil attach <path/to/image_file>
# To unmount an image:
hdiutil detach /Volumes/<volume_name>
# To list mounted images:
hdiutil info
# To create an ISO image from the contents of a directory:
hdiutil makehybrid -o <path/to/output_file> <path/to/directory>