How to "find and replace" in a PDF on OS X?

Solution 1:

As Tom Gewecke mentioned in a comment, Adobe Acrobat can do this.

I was also able to do this with PDFpen, as also suggested by Tom Gewecke.

Both apps seem great. Since both of them are quite pricey, though, I would also like to share a way to do this with the free and open source software LibreOffice.

1. Open the PDF with LibreOffice.
2. Click Edit in the panel, then Find & Replace.... Use the feature as desired.
3. Click File in the panel, then select Export as PDF.... Save the PDF.

I suspect LibreOffice probably decodes and re-encodes the document. But in my case the new document looked precisely identical to the original (except for the edits, of course.)