Download of Ratoc FR1SX 1.3 for Mac was available from the developer's website 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. This free Mac application is a product of RATOC Systems.
From the developer:
This software is not the device driver for FR1SX. As the device driver is already included in MacOS, you don't need to install the special driver for FR1SX. If your FR1SX is working well with SCSI devices, you don't need to install and use this Utility. But if you have come across some SCSI trouble, please try this Utility. It will provide some good solution to fix them.
You may want to check out more software for Mac, such as FR1Utility or InterChangeX, which might be similar to Ratoc FR1SX.