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MacOS/Finder context menu entry: Convert to CD image

Transforms arbitrary folders into ISO 9660 joliet ISO images. Simply download and double-click the Automator script.

Then Finder -> Select arbitrary folder -> Convert to CD image

Screencast

How to install?

  1. Click on the green button "Clone or Download" -> "Download ZIP".
  2. Extract the ZIP and double-click: "Convert to CD image".
  3. Click "Install" (prompts if system service should be installed)

How to use?

  1. Open Finder
  2. Select an arbitrary folder
  3. Right-click -> "Convert to CD image"

Use the .iso file of the file/folder created as ISO 9660 joliet image.

How does it work?

The whole process is using the Automator capabilities of Mac OS. Automator is a scripting subsystem available since OS X 10.4 (Tiger). It is set up as a "Service" which takes a selected folder in
Finder as an argument. The services registers the Finder context menu entry "Convert to CD image".

The command executed (in bash) is:

handle_error() {
    osascript -e 'tell app "System Events" to display dialog "Select a single directory (not a file) and make sure the output ISO file does not exist already."'
}

trap 'handle_error $LINENO' ERR

for f in "$@"
    do
             hdiutil makehybrid -o "$f.iso" "$f" -iso -joliet 2>> /dev/null     
    done

exit 0

Motivation

Helping PCem, an emulator to run on MacOS brought up the issue how to transfer files/folders from the host to the guest OS. This works using CD ROM image mounts but the process wasn't quite elegant and involved complex terminal interactions. This solution feels better.