Download of Drive Scope 1.2.18 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac application was originally produced by Micromat. We recommend checking the downloaded files with any free antivirus. The program lies within System Tools, more precisely Device Assistants.
From the developer:
With Drive Scope you can see into the health of most any drive† connected to your Mac. Drive Scope not only provides early warning when a drive is on the path to failure, but provides a deep dive into the health of the drive. See what errors have occurred, and when, along with whether the errors are temporary or an indicator of overall failure.
You may want to check out more Mac applications, such as Disk Scope, Scope or Style Scope Free Edition, which might be similar to Drive Scope.