Downloading HashBox 1.4.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is Aleksandar Stevic.
From the developer:
HashBox is an easy-to-use file hash generator for your Mac. The application supports MD4, MD5, SHA1, and SHA256 hashing algorithms. You just need to drop the file into the program and you will be provided with the desired hash file. Also, the tool can copy the hash to your pasteboard if you like.