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How to Combine Multiple PDF Files on Mac

You think you’ve figured PDFs out. You know how to save, how to store, and how to edit them. You also know how to send them to other people for digital signatures. Then, one day, you come across a unique problem that requires you to combine multiple PDF files on your Mac.

You thought you had everything covered. But now someone has sent you a contract that’s been split into two PDF files, and you’re not sure how you should approach it. If you were using paper, you’d be able to sort them in the same pile, and voila—you’d be done. For that reason, the frustration of managing multiple PDF files on a Mac can lead some users to wonder why they don’t go back to hard copies of contracts.

Good news! It doesn’t have to be that hard. You simply need the appropriate instructions for handling multiple PDFs and combining them into one, single, usable file all parties can share. And while it sounds complicated, you’ll see that once we steer you through the process, it’s not as complicated as it might seem. In this guide, we’ll teach you how to combine multiple PDFs into one file on the Mac—as well as some other similar options that may come up.

Combining Multiple PDF Files on a Mac Into a Single PDF File

Let’s say you’re using Nitro PDF Pro for Mac. From there, it’s actually a relatively simple process for getting two PDF files into one. But let’s be honest: no one is born knowing this stuff. Here is the fastest way to combine your PDF files.

Note that these steps can work for both PC and Mac, as Nitro is web-based, but we’ll tailor these instructions for Mac users so there’s no confusion.

  • Within Nitro, Open the two PDF files that you plan on combining.
How to Combine Multiple PDF Files on Mac(1).png

  • On Sidebar, select the option for showing thumbnails in both PDFs. To do this, you can click Sidebar Button
    How to Combine Multiple PDF Files on Mac(2).png
    under the toolbar.
  • From there, select Thumbnails on the menu. You’ll access this from View -> Thumbnails.
  • This will create a list of thumbnails. You can select all of a PDF’s thumbnails by using Edit -> Select All (or Command + A on a Mac) from the menu.
  • Now that you have two sidebars for two PDFs, drag the thumbnails from the sidebar to the PDF where you want to merge both files.

Since we broke it down step-by-step, it might sound more complicated than it is. The basic process is simple: you bring up the thumbnails of all the relevant PDF sections you want to bring to your “main” PDF file, or the PDF file that you’re merging with. Simply drag these to the sidebar of that relevant PDF file, and voila—you’ve got a merged PDF with all of the relevant pages you want.
Tips for Making the Most of Your Combined PDFs

What about Table of Contents? If you’ve built the PDFs properly using a program like Nitro PDF Pro for Mac, you’ll notice that the table of documents will automatically update to reflect the new, merged file. But make sure that you double-check your Table of Contents before you send it off to a client or customer.

  • A quick way of doing this is to open the PDF you want to serve as your “master PDF,” and then clicking File -> Insert. Insert the new PDF that you want to bring into this master PDF. Keep in mind that the file you’re inserting will then go after the current page you have highlighted, so make sure that if you want the new PDF to drop in after the current PDF, you’re on the last page.
  • How do you insert another PDF file even more easily? With Nitro open, you can simply identify the file in Finder on your Mac, and then drag both into the Thumbnail View. The PDF you just brought in will then come after the insertion point you had highlighted with Nitro already open.

How to Add Single Pages from a PDF to Another PDF File

You might have come here searching for options on combining multiple PDF files on a Mac. But as you zoom in to each PDF file, you might realize something: you don’t need to combine the entire PDF files. What happens if you want to add individual pages from one PDF file to another?
As you might imagine from the previous instructions, it’s actually easier than you think. In this process, you’ll simply select the ones you want to drag before dragging them over. It’s intuitive enough that you can probably guess how to do it if you’ve already been poking around with Nitro PDF Pro for Mac. But to make sure it’s clear, let’s break it down step-by-step, as you can see on our Adding Pages key page.

  • Open both PDF files, just as before. Remember that you’re choosing both the PDF file that you want to “host” both files, and the PDF file from which you only need a few pages.
How to Combine Multiple PDF Files on Mac(3).png

  • Your next step is to bring up the Thumbnail view again. Show Thumbnail view in the Sidebar by clicking on the Sidebar Button.
How to Combine Multiple PDF Files on Mac(2).png

  • in the toolbar. 
  • With the proper document selected, select Thumbnails from the menu, or View -> Thumbnails.
  • Now you’ll have a list of thumbnails of individual PDF pages.
  • Key point: where will the single page end up? If you drop it to the current page on your second PDF’s view, it will automatically insert your new page before that page. So make sure that the proper pages are lined up before you drag over the files.
  • Drag the thumbnails of each page you want to transfer and drop into the second PDF.

As you’ll notice, combining multiple PDF files on a Mac is essentially the same process. In this process, however, you simply pick and choose which individual pages (based on the thumbnails) you want to drag to the new PDF. And in the other version, you’re dragging all of the individual pages to the PDF to combine the two.
Here’s a good way to think about it: once you understand one part of the process, you’ll pretty much understand the other. So no matter which version of these instructions works for your current PDF needs, they’re both worth learning for future reference.

How to Handle Multiple PDF Combinations Using AppleScript

If you’re a Mac user who’s sophisticated enough to use AppleScript, then you already know how much automation is possible when using Macs. The question is, how can you use your skills with AppleScript to automatically merge PDFs? If you do it right, you can avoid the manual labor of all that clicking and dragging—while still enjoying the ease of use offered by Nitro.

  • First, you’ll have to make sure that every PDF file you want to combine is located in the same folder. This will keep things nice and tidy for AppleScript. If this isn’t already the case, create a new folder specifically for this purpose.
  • Locate the AppleScript icon
How to Combine Multiple PDF Files on Mac(4).png

on the right side of the menu bar. It should be located near Help.

  • Under the AppleScript menu, select Combine PDFs
  • This will bring a window that asks you which PDFs you want to combine. Select both of the files you want to combine. Then click Choose.
  • PDFpen will automatically create a new Untitled PDF with the files you selected. You can then click Save the PDF to make sure that it’s in the location you want and with the name you want.

Combining Multiple PDF Files Isn’t Rocket Science

If you’re not used to working with PDFs, they can be tricky. Fortunately, tools like Nitro make it possible to easily combine, merge, and edit PDFs as if you were using something as easy as a word processor. The result? You’ll have PDF files that reflect exactly what you want to reflect. You can even try it yourself to see how easy it can be. Choose a Free Trial with Nitro PDF Pro for Mac to practice the steps you read here and see how easy it is to combine multiple PDFs on your Mac.

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