Starting from macOS 10.14.5, only notarised V5 drivers starting with iSCSI.1.3.5 and AVFS-2.5.2 can be used with V4 and V5 DDP’s.

Notarised drivers can also be used from macOS 10.9 to 10.14.5.
Non notarised V5 drivers can be used from 10.7.x to 10.14.4.

V3 DDP under support can upgrade to V4/V5.