If you’ve ever wanted to combine multiple PDF files into one, or selectively add certain pages from a PDF file to another, so that you didn’t have a ton of related PDF files laying around all over the various folders on your Mac, then you can use Preview to easily combine any number of those PDF files together into one.
The concept is the same but the step by step pictures will look slightly different.
Please click on the version of OSX that you have to find out how to merge a pdf file: How to merge PDF files in Mountain Lion 10.8 (2012) How to merge PDF files in Mavericks 10.9 (2013) How to merge PDF files in Yosemite (10.10) (2014) How to merge PDF files in El Capitan (10.11) (2015) For all versions of OS X prior to Mountain Lion (10.7 and earlier) just follow the instructions below. Drag a second pdf ON TOP OF an existing page thumbnail. SUMMARY: To combine two separate PDF files into one document you need to drag the new pdf ON TOP OF an existing thumbnail until the grey border appears – then it will merge the two pdfs together.
You can search files in preview mode and sort by page number.
The latest version of the application handles JPEGs and PNGs in PDFs much better as they are no longer recompressed.
Either drag and drop PDFs into the program's interface or add them via the Finder.