Yezz, I did disable RAW-rendering, trying to find an explanation for the difference in colours between originals and saved images (as TIFF or PSD), hoping to avoid rendering by Apples Image IO. Now, after RTFM, I understand the workaround of PM, regarding RAW's + JPEG's.
So, in future I will use PS again for rendering the RAW's, after selecting images in PM.
Btw: DNG's still can't be saved in PM, whatever I tried.