Using Kinemac it is possible to export the default *.kmc animation files as QuickTime movies (*.mov). This is done with the export the function within the program. It doesn't seem any other 3rd party software is capable of KMC to MOV conversion.
Convert Kinemac animation file to Apple QuickTime digital video.
We found one software available in the database for this conversion.
Apple macOS / Mac OS X software - convert kmc to mov on OS X
A 3D Real Time Animation Software for OS X
Convert from kmc file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.