Support for tiff files has been removed from the latest versions of pdftex and pdflatex. However, it is possible to configure TeXShop so it will automatically convert graphics in tiff format to png format during typesetting. As a bonus, the program will convert graphics in eps format to pdf format during typesetting. In both cases the original graphic file is preserved and a new file with appropriate format is created. Tiff files must still have extension ".tif" rather than ".tiff".

New installations of TeXShop are already configured appropriately. Users who are upgrading should make the changes listed in the next two sections. Most users will have made the changes in the first of these sections long ago.

How do I configure TeXShop?
Converting Graphic Formats Automatically