Our website provided a free download of SoftBlock 1.0.3 for Mac. This Mac application was originally developed by BlackBag Technologies, Inc. The software belongs to Education Tools.
From the developer:
SoftBlock is a kernel-based forensic write-blocking tool that quickly identifies devices upon connection, and depending on user preference, mounts them in either a forensically sound read-only manner or a conventional read-write configuration. This product is designed for both large scale forensic lab environments as well as for individual investigators where the need is to preview and analyze one or more evidentiary devices.
You may want to check out more software for Mac, such as Genealogy Pro, sciatrope or Curvus Pro X, which might be similar to SoftBlock.