PDF Reader Skim
Installation
Download from https://skim-app.sourceforge.io/
Note
PDF Searching:
Trying out https://skim-app.sourceforge.io/
For PDF searching so far its looking better than the regular mac os preview PDF search.
MacOS preview search is not able to match exact search Eg: "proactive people focus their" in the pdf of 7-habits-of-highly-effective-people.pdf
While skim was able to match it in a PDF. To open can use Open With