THUM 1.8 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.
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 Practical Design Group, LLC. The software lies within System Tools, more precisely Device Assistants.
From the developer:
THUM Mac monitors the temperature and humidity, storing the readings to a text file. The software can send e-mail if an alarm point is reached to notify you of environment problems in the monitored area. The software can send e-mail if an alarm point is reached to notify you of environment problems in the monitored area.
You may want to check out more software for Mac, such as toDoo, NWD-211AN Utility or BESAgent, which might be similar to THUM.