###How Do I Get Properties of Messages.app Chat?
Running Messages 9.2 (5100) on macOS 10.11.4
No matter what I try, the chat properties are always unavailable:
use AppleScript version "2.4" -- Yosemite (10.10) or later use scripting additions tell application "Messages" set oChat to first text chat set propList to properties of oChat end tell
No properties are avaiable for any chat item.