Is there a PDF annotation application for OS X that doesn't suck? I am starting to hate OS X. I've tried many PDF applications to read and annotate PDF documents. Skim was good until OS X El Captain. It became useless for annotation (by annotation, I mean drawing lines in the document. I use this way in PDF documents where words are not recognised). Preview has just stopped working 10 minutes ago and I lose a lot of annotations. Is there any sophisticated app that works well on my mac?
Maybe you could try PDFPen. It's a bit expensive thought. A trial is available
https://smilesoftware.com/PDFpen/index.html

For me Foxit Reader does the job.