Using large files in Mac OS

To capture, export, import, render, preview, or print to video large files (greater than 2 GB) in Premiere, you need the following:

If one of these three components is missing and you are capturing a large file, Premiere will generate a referenced movie instead of one large movie file. A referenced movie is a series of files, each under 1.99 GB, and each referencing the next. These reference files share a common name, for example, Myfile, Myfile01, Myfile02, Myfile03. You can open or import the first file (or the "parent file") of a referenced movie, and the remaining files ("child" files) open automatically. If you attempt to open a child file, Premiere displays an error message. When you import or open a referenced movie, Premiere interprets it as one large file.

Capturing and Importing Source Clips > File-size limitations > Using large files in Mac OS