The Mac Developer Library version of the Scroll View Programming Guide for Mac was last updated June, 2010. The straightforward step-by-step instructions don't apply today.
I'm trying to port some code from iOS to Mac. I've looked at the Migrating from Cocoa Touch section of the Mac Technology Overview. This answer was useful. And I found a forum post at bignerdranch.com that supplied the critical tip to turn off Autolayout.
Are there recommendations for a good introduction to Scroll Views for Mac beyond the NSScrollView Class Reference?