FinalCrypt 6.3.9 for Apple OSX (Server: FinalCrypt)

Double click the: "finalcrypt_apple_osx.dmg"
Drag: "FinalCrypt" to the "Applications" map
Open System Preferences → Security & Privacy
Click (Un)Lock set "Allow apps dl from" → "Anywhere"
Open Launchpad (F4) and click: "FinalCrypt" to start

Command line installation:

hdiutil attach finalcrypt_apple_osx.dmg
sudo cp -R "/Volumes/FinalCrypt/FinalCrypt.app" /Applications/
hdiutil detach /Volumes/FinalCrypt/

Run from command line:

/Applications/FinalCrypt.app/Contents/MacOS/FinalCrypt &