On Tuesday, 8 August 2017 15.50.28 WEST Dr Eberhard Lisse wrote:
> Hi,
> is there a way of changing a lyx file from an older version to the
> current one on the command line, like opening the file, making a
> modification to trigger the saving allowed and saving it under the old
> filename?
>       find . -name '*lyx' -exec whatever {} \;
> I wouldn't mind even a Apple Script :-)-O
> greetings, el

I do not use macs, last time I did it was running linux as opposed to macos 9. 

In any case the script responsible for converting the lyx files to a newer 
format is called lyx2lyx.

If you get its path (e.g. here on linux it is /usr/share/lyx/lyx2lyx/lyx2lyx) 
then you can call it 
directly. It has several options for command line call and it even supports 
compressed lyx files 

I can help further if you need.

José Abílio

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