PDfelement for Mac allows you to extract pages from a PDF to create a new PDF easily.
Open one file and click the "Organize Page" button on the top left.
In the pop-up window, click the "Extract" button. Click a single page or hold the Command key and click multiple pages at the same time, or select the page range you want to extract on the right-side panel.
Click the "Extract" button to extract and select an output folder to save the new file.