How do I convert a picture to PDF under Mac?

There are many pictures in the format, PDF is also used frequently, then how to convert the picture to PDF format? In addition to the software can be converted to the format, through the basic operation of the computer is also possible! Small series summed up the specific procedures, simple steps can be your hands of the picture into a PDF format, the following and small series to see how the specific operation of it!   

To convert a picture into a PDF format:

First step: Select all the pictures you need
Step Two: Choose "Select All" in the editing options step three: Select "Print" Fourth Step: Select "Save as PDF

How do I convert a picture to PDF under Mac?