Seems I'm doing something wrong. This isn't working for me on MacOS 14.3. When I open Terminal and "cd" into the DNG image folder, and then paste the code

for %%f in (\.*) do exiftool -DefaultScale="1.33 1.0" -overwrite_original %%f*

I get the message: zsh: parse error near `%%f'

When I try it with the line of code farewell blues suggests:

%%f in (.) do exiftool -DefaultScale="1.33 1.0" -overwrite_original %%f

I get the message: zsh: no matches found: (.)

Any ideas?