Jun 10

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Combining pdf documents on an Apple computer is easy.

There are lots of websites offering software to merge PDF files, but you don’t need a third party program to do it. It’s built right in to OS X for free.

OS X comes with a free application called ‘Preview’ that will open automatically whenever you click on a pdf file. It turns out that Preview can edit and merge pdf files!

Preview app

You can merge PDF files using the built in ‘Preview’ application that comes for free with OSX.

Exactly how you do this varies depending on which version of OSX that you have. 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.

To join two or more pdf files together using Preview:

1 Open the pdf file in preview.

2. Open the thumbnail view (Shift-⌘-D)

3. Drag a second pdf ON TOP OF an existing page  thumbnail.

When you drag in step 3 it must drag to on top of the thumbnail, as in over it, not above it.

This is a bit hard to explain, the best way to grasp the concept is to look at the pictures below.

WRONG WAY: If you drag the new pdf file underneath (or above) the existing pdf they are not merged – it will only insert a thumbnail link to the pdf.

RIGHT WAY: Drag the new pdf file on top of the existing one and they will merge into one – creating one pdf document out of the two. (Notice the extra grey border compared to the left photo.)

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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 then save the new merged pdf.) 

If you drag it into the sidebar but not on top of an existing page the new file will be added as an external link – not merged into the original pdf document.

Read on for how to do it step by step.

CONTINUE READING >

582 Responses to “How to merge two pdf files in OSX 10.6 – 10.11”

  1. Rakesh says:

    Thanks so much, this was really useful

  2. Catia says:

    I followed these instructions, but ….!!!
    Now in my Preview, in the thumbnails’area, i see my ​​3 pdf pages, that I want to merge, but then, there is no way to merge them really: if I save this file, only the first page is saved, if I try to print it, only the first page is printed.
    How it works??? Please…I feel so stupid…

    • Catia says:

      I tried again!! We must put the new pdf NOT ON THE TOP (as these instructions say) but just OVER the existing page! OK, so it works

      • Wayne says:

        Yes ‘over’ as in put it right in the middle of the thumbnail, as if you were putting one piece of paper on top of another piece of paper in a pile of paper… not ‘above’ it as in ‘up’ the screen. English is a bit ambiguous at times!

  3. Joseph says:

    Awesome article. Thanks! The print-to-PDF solution was perfect and simple.

  4. Bill says:

    Coolio. Works a treat and saved me loads of time. Cheers.

  5. Janos says:

    Very good explanation, It helped! thanks

  6. Katrina Currier says:

    Thanks for these helpful tips! Can you explain how to undo these actions? I have merged too many pages and now want to delete a few of the pages I dragged in, without deleting the whole merged file. Is this possible? Thanks!

  7. Mary says:

    Great!! Thanks a lot, the process is way to fast and easy :)

  8. Rubi86 says:

    Thank you! it worked :)

  9. Ian says:

    This is great and worked perfectly. I became an Apple convert some years ago, in a computing context it was the best thing I did.

  10. Ade says:

    thank you so much. this really helpful !! :)

  11. EFalk says:

    Such a small detail, but figuring out the right way such that you can actually save the combined document was SO helpful!

  12. Lisa says:

    At midnight and after hours of frustration, this was a God-send! Thank you so much.

  13. SK says:

    Thank you SO much! I kept putting the thumbnails after the original (like on a PC) and it obviously didn’t work. I’m so thrilled and grateful!

  14. Otto the Automator says:

    The ability to combine (merge) multiple PDF files into one file in the Finder is built-into OS X, you just have to turn it on:

    http://macosxautomation.com/automator/combinePDFs/index.html

    Enjoy!

    • Wayne says:

      Looks great. Although that’s a very complicated way to do a very simple task that can be done much more simply in Preview. But, it might be good if you have a lot of pdf files to merge or you do this task on a regular basis. Thanks for the link.

  15. Richard says:

    This is not working for me, no double border appears, files don’t merge, remain as 2 documents

  16. TYBAN says:

    This article is worthless, doesnt work

  17. Keith says:

    I usually consider myself savvy when i read these tips, but I’ve spent 90 minutes trying to make Lion do what this article says it will do with absolutely no luck.

    The sidebar method doesn’t work either. When I click on “view” and scroll down to “sidebar”, I’m offered two dead grey choices, neither of which are clickable (“collapse all” or “expand all”). No sidebar appears anywhere.

    @£$%^!

  18. Mariana says:

    Thank u very much, saved my life, I was going crazyyyyy

  19. Ken says:

    Thanks for taking the time to put these steps on the web! I’m not sure why some are having problems. It worked perfectly for me. I really appreciate the detailed instructions.

  20. Park says:

    Thanks! . . . Works easily.

  21. Danny Coyle says:

    I used this and it worked except it changed the landscape pages to portrait and messed them up, help?

  22. Hannah says:

    I can easily follow the steps and drag one file ON TOP of the other and I see the double boarder. But once I release the second file on top of the first, nothing happens…? I’m lost what to do next! I tried to Save As and reopen, but its only the 1st file. Any suggestions?

  23. Lanelane says:

    Worked for me. Thanks

  24. Dunks says:

    Brilliant.
    So simple, so obvious.
    So simple and obvious that it needed to be pointed out!

  25. Jakob says:

    This was soooo helpful. Can’t thank you enough. After spending hours trying to find another program, sometime it’s the simplest solutions. Many thanks!

  26. John Satan says:

    Excellent tip! Took some doing, though…in my version of 10.6.8 I had to ‘select all’ pages in the sidebar and then click ‘Print Selected Pages’ in order for all to be merged into one file. Thank you.

  27. Tonya says:

    THANK YOU! After many web searches for answers and tons of waisted time trying to combine PDFs – finally you have provided a real solution that WORKS.

  28. ruth says:

    very helpful, thanks

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