I give a lot of talks using PDF slides built with LaTeX beamer. I was very happy with Skim, because it offers you to synchronize two Skim windows, s.t. you don't have to mirror the screen, but instead use both displays at their native resolution and also be able to watch the thumbnail sidebar etc. on your own display without your viewers watching (similar to what PowerPoint and Keynote offer with two displays).
However, as we all know, Apple has rendered PDFkit unusable since Sierra and Skim uses PDFkit for rendering. The main issue that rendered PDFkit unusable for presentations is the fact that it first shows a low resolution version of the content, before actually showing the high resolution rendering. This is very bothersome in the context of overlays.
- In Sierra one could circumvent this by scrolling through the entire presentation beforehand, which apparently built up the cache of high resolution renderings
- In High Sierra this is no longer possible, every time a page is shown it is shown at low resolution for a split second
Thus, I'm looking for alternative PDF viewers, which support two displays without mirroring but do not rely on PDFkit for rendering. Adobe Acrobat renders fine, but is not so suitable for presentations.