TXTcrypt 1.4.2 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. TXTcrypt for Mac lies within Security Tools, more precisely Mac protection.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free software for Mac OS X was originally designed by Vlad Alexa. The most popular versions of the program are 1.4 and 1.3.
From the developer:
If you want to send a sms that only someone knowing a password for it can understand, or just need to encrypt a conversation to hide it for prying eyes, now there is a easy way for that on a iphone. With TXTcrypt just enter your message and a password for it, now the encrypted message can only be decoded with that password, just tell it to someone, and send them message encrypted with it, they can use TXTcrypt to decode it.
You may want to check out more Mac applications, such as ESET Cybersecurity, Security Camera or TokenLock, which might be similar to TXTcrypt.