SigmaTerm 1.0 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. The unique identifier for this app's bundle is com.etrow.sigmaterm. SigmaTerm for Mac lies within System Tools, more precisely Remote Computing. The most popular version of the application is 1.0. We recommend checking the downloaded files with any free antivirus. This Mac app is a product of ETrow, Inc.
From the developer:
SigmaTerm brings professional quality terminal emulation to the Mac platform with a modern interface. But it's more than just a pretty face; SigmaTerm is loaded with all the features that come with being based on an emulation platform with more than ten years of development.
SigmaTerm supports all the connection methods you'll need: SSH, Telnet, RLOGIN, and serial.
You may want to check out more software for Mac, such as Receptor Remote Control or UltraVNC, which might be similar to SigmaTerm.