by jwc » Fri Aug 12, 2022 2:44 am
As the icons in your screen capture shows, the mhmat and mhclo files are still text files.
Removing the string ".txt" from the end of the file name does not change this in the Mac OS.
Open up the "Get Info" window on these files, and in the "Name & Extension" section, change the extension to the correct value.
The Mac OS should ask if you really want to make the change, this is a good indication that you have done it correctly.