Apple CoreStorage/File Vault/Fusion Drive Volumes
The macOS operating system has the following disk management systems:
File Vault, is a disk encrypted utility;
Fusion Drive is an Apple's hybrid drive technology;
CoreStorage is a logical volume management system.
R-Studio supports all these technologies and can unlock their encrypted volumes (hard drives and images).
To unlock the volume
If the volume is partially encrypted, R-Studio can recognize which part is encrypted and which isn't. It will provide a correct access to the unencrypted and encrypted parts of the volume, provided that the correct password is entered.