Nitro Pro Alternatives for Mac OS X

PDFsam Basic is a free, open-source, and incredibly useful tool for handling PDF files. It excels at core functions like merging, splitting, rotating, and mixing PDFs, offering a simple and intuitive interface for both simple and complex tasks. It's available across major operating systems and doesn't require an internet connection.

Adobe Acrobat DC is the industry-leading solution for working with PDF documents. It allows users to create, edit, sign, share, and manage PDFs with advanced tools for professional workflows across desktop, web, and mobile.

Skim is a free and open-source PDF reader and note-taker for macOS. Tailored for scientific use, it offers advanced annotation tools, robust export options, and tight integration with LaTeX, making it an ideal companion for academic research and professional document management.

Master PDF Editor is a comprehensive PDF editing suite for Windows, macOS, and Linux. It empowers users to create, edit, view, annotate, and sign PDF documents with a robust set of tools.