The 2.5.1 version of QuickDMG for Mac was available as a free download on our website. This free Mac application was originally designed by Tetsuro KURITA.
From the developer:
QuickDMG allows you to easily create a disk image from a file or a folder. It is recommended to launch from a launcher of keyboard shortcut, as QuickDMG can create disk image from a selected item in Finder when launched. You can do so and avoid the need of dragging or selecting an item.