Check out a collection of instruments for data removal from your system. Perform a scan of your drives, excluding SSDs, and completely wipe information from all directories, including folders themselves. View and confirm the results with no restoration options.
DBAN 2.3.0 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. The software lies within System Tools, more precisely System Optimization. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X was originally created by DBAN Team.
From the developer:
While DBAN is free to use, there’s no guarantee your data is completely sanitized across the entire drive. It cannot detect or erase SSDs and does not provide a certificate of data removal for auditing purposes or regulatory compliance. Hardware support (e.g. no RAID dismantling), customer support and software updates are not available using DBAN.
You may want to check out more software for Mac, such as Dock Delight or Snow Checker, which might be related to DBAN.