Preview is a complete free pdf editor because it arrives preinstalled in your Mac device. Please notice, we also pick up some affordable pdf editor for your reference due to the shortage of advanced features from the free pdf tools, such as PDFelement, PDFexpert for Mac and so forth. Then will your current software can be compatible with the update system? The following 7 free and compatible Mojave PDF editing software can help you adequately prepare to edit and manage PDFs with the new operating system. Mac OS 10.14 Mojave is expecting to release in upcoming Step/Oct of this year.