Downloading CipherDisk 2.0 for Mac from our website was free. The actual developer of this software for Mac is SubRosaSoft. The program belongs to Security Tools.
From the developer:
SubRosaSoft CipherDisk provides "driver level" 448-bit transparent on-the-fly encryption for OS X volumes. Once you convert a plain volume to an encrypted volume, it will be inaccessible to anyone until you enter a password to unlock it. When unlocked, the drive will run and behave normally like a regular volume.