Cisdem PDFCompressor for Mac is a handy PDF size reducing tool. The app allows you to reduce the size of all your PDF files by up to 90%, whilst still maintaining the original quality.
Cisdem PDFCompressor for Mac has an easy to use interface that has a standard window with three buttons across the top bar; Add Files, Delete, and Clear. The bottom bar consists of the Output Folder settings where you can customize the end folder for your compressed documents. To start working with the app, simply click 'Add Files' or drag and drop PDF files in the main window. Next, just customize your output and hit Compress. Voila!