13. Unmount multiple volumes

This task unmounts multiple (or every removable, every disk image) volumes at once.

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(Trigger)
1. Hot key (Optional)
Or set other appropriate trigger to unmount volumes.

(Action)
1. Unmount Volume
Choose volume to be unmounted. This action can be created as many as user needs.

2. AppleScript (Optional)
Or it's available to unmount every removable volume with following script.

tell application "Finder"
    if ((count of disks) > 1) then
        set allDisks to disks whose ejectable is true
        repeat with eachDisk in allDisks
            try
                eject eachDisk
            end try
        end repeat
    end if
end tell

To unmount every disk image...

tell application "Finder"
    if ((count of disks) > 1) then
        set allDisks to disks whose ejectable is true and journaling enabled is false and ignore privileges is true
        repeat with eachDisk in allDisks
            try
                eject eachDisk
            end try
        end repeat
    end if
end tell