The best option seems to be this software but it is designed for DMMs with RS232 output, so you need to use a serial/USB converter, which may require an additional driver so that's not really a straightforward solution.
Otherwise I'll have to use a DMM with USB output, and run it in a Windows environment on my Mac using Parallels.
Any recommendation for such a (not too expensive, i.e. less than $100) DMM with USB connection and logging software, would be welcome.
The plug at the end of the white cord, the software screen capture, and the format of the downloadable file, show that this is a software designed ages ago to run on MacOS < X (Classic, no longer supported on recent Macs).
Thanks all the same for searching.
You're welcome. Sorry it didn't work out. I will be looking to solve the same problem someday soon and if I run across any solutions, I'll let you know.
k