Apple’s built in pdf reader app called ‘Preview’ can merge 2 PDF files and edit PDF files. In macOS Sierra 10.12 all you need to do is drag the thumbnails that you want to merge from one PDF document to the other and then save the document.
Read on for some screenshots of what this looks like.
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Apple have retained the ability to merge two PDF files with the built in ‘preview’ app in OSX El Capitan. As with previous versions of OS X, there are 3 different ways that you can do this. 1. You can merge them into 1 document in Preview as you are opening them. 2. You can open them as seperate documents in Preview then merge them by printing them to one pdf file. 3. You can open them as seperate documents in Preview and drag pages from one to the other. Continue reading 〉