DS620 1.0 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is an intellectual property of Brother Industries, Ltd. The program is categorized as System Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
DS620 is a scanner driver for the Brother™ DS-620 mobile scanner. This is a comprehensive file containing available drivers and software for the Brother machine. It's ideal for capturing business documents, as well as receipts, business cards, laminated identification cards, invoices, photographs, and more.
You may want to check out more Mac applications, such as toDoo, NWD-211AN Utility or BESAgent, which might be related to DS620.