How to merge or combine pdf files into one on mac? (opens in new tab)

I have several PDF files in different parts and I want to merge them into a single PDF document on my Mac. The PDFs contain related pages, and it would be much easier to share, store, and print them as one file instead of keeping them separate.As a beginner, it is not clear whether macOS has a built-in tool for merging PDFs or if third-party PDF merger software is required. A simple and safe method is preferred, especially one that does not require uploading documents to an online service.Wha...