Here are my latest findings: When using a UBS cable the printer may work together with OS-X 10.10 (yosemite), however the file must have the right format (width to height ratio) , otherwise the printer denies to do its work; ... somehow cumbersome .....
I have tried out now JPGs on SD card and on usb stick, my JPGs have EXIF data (i create JPGs via aperture; i can see the EXIF on the JPG with different tools. If you do not believe me: => http://goo.gl/oCYNtf is an example of such JPG with exif data ...
