The 2.1 version of Hashsum for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Anders Friis Pedersen. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Hashsum is an easy-to-use drag-and-drop tool that quickly lets you look up the checksum for any file. The application currently supports the commonly used MD5, SHA1, and SHA256 encryption algorithms. The latest version of Hashsum supports checksum comparison.