SoftRAID 5.6.7 includes important bug fixes and changes that allow SoftRAID to be compatible with macOS 10.13 High Sierra.
High Sierra involves a completely new file system (APFS) as well as major changes to the kernel, security and third-party software requirements, and the SoftRAID team has worked hard to ensure that SoftRAID will work flawlessly with High Sierra, although it does not yet support APFS. This means that currently, SoftRAID does not support creating, modifying or converting APFS volumes. However, SoftRAID's certify, verify and monitoring features will work with APFS formatted disks. Full support for APFS will be included with SoftRAID version 6.
Bugs fixed in version 5.6.7:
Fixed a bug in the SoftRAID XT and SoftRAID Lite XT applications which affects serial number validation.
SoftRAID does not support creating, modifying or converting APFS volumes.
There's a bug in Mac OS which causes SoftRAID volumes to not be displayed in the "Storage" tab of the "About this Mac" window.
Important note for iMac Pro Owners using SoftRAID
Not sure if this is still the case with v5.6.7, but the SoftRAID important notices page (at bottom of page) has a section titled "iMac Pro Users: SoftRAID 5.6.5 driver update problem" regarding updating the SoftRAID driver on iMac Pro systems. (iMac Pro shipped with driver v5.6.2.) They're working with Apple on this but until it's resolved they've included a step-by-step workaround there. (If any iMac Pro owners running macOS 10.13.4 are using SoftRAID 5.6.7, let me know if the update helps.)