It appears that graphics files saved in Microsoft PhotoDraw picture format (.mix) can be exported to more common graphics formats like JPEG, PNG or TIFF with special graphics converters or even graphics editors. Sometimes TIF is preferred suffix over TIFF.
Convert Microsoft PhotoDraw image to Aldus Tagged Image File Format (TIFF) bitmap image.
We found one software available in the database for this conversion.
Microsoft Windows software - convert mix to tiff on Windows
A dedicated conversion software
Convert from mix 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.