I am looking for a good note taking application that will allow me to import PDFs and take notes on them for classes. My professors provide us with PDFs of their presentations and then we take notes on them. I am mainly looking for something to take notes on Mac, so an iPad app is not necessary but if there is one that is good, I wouldn't mind. I do need good organization as there are a lot of notes and I need to easily be able type on the PDF without having too much clicking. I have tried Notability and while I liked that it had the Mac and iOS versions, the syncing was a problem and it does not have the best organization for a large number of notes and classes. I have also used Microsoft OneNote for Mac but I feel like that is not as powerful as the Windows version. I would be willing pay for a decent app, especially if its highly recommended. Thanks in advance for your help. Do you have any suggestions?