Select all TIFF image and open with Mac Preview. Batch conversion mode is supported by this application For mac users, Preview, the image and PDF tool in the macOS installer can work as the solution to convert multiple TIFF to PDF on Mac for free. You can also upload the images in other formats, including BMP, GIF, JPG, JPEG, PNG, etc. After launching the PDF tool, choose Image to PDF from the interface and click Add Files to import the TIFF files you want to convert.
