Titan launcher has long been used by those players who don’t have money or the desire to buy Minecraft. In the event that you need a modern launcher with support for outdated versions of Minecraft that doesn’t require license and activation, the Titan Launcher can be your favorite Launcher. Like other Minecraft launchers, Titan has undeniable ease of use and supports only Windows.
Unfortunately the Mac version of titan launcher isn’t available and likely will never be since Titan launcher is not being updated anymore.
Latest available version of Minecraft that can be played with Titan launcher was Minecraft 1.13.2. Generally all download links are also gone.