Secret Message was developed for children to send "secret messages" within "plain messages" to their friends via email. The Sender types a "plain message" and a "secret message" and saves a file which is used as an attachment to an email to a friend. The friend opens the Secret Message application, loads the attachment (an image) and views the "secret message". Secret Message is freeware.
What is new in this release:
Version 2.2.0 is compatible with Yosemite's default security.
Intel Mac OS 10.4 or later