Am I the only person having issues trying to watch the "free" rebroadcasts of CBS programs? I tried to watch NCIS on my Mac mini running Yosemite- everything was fine until the first Hershey Commercial began, which caused the "spinning beachball". I also tried to view the program on my 2012 i7 iMac running Sierra- froze when the same commercial began running? I use Safari as my browser, and all OS updates are current.
Try it with Firefox or Chrome. Safari has been a royal pain for a while now. My biggest gripe is when watching live streams from Facebook. Most streams are guaranteed to stall or go to frequent buffering with Safari. Occasionally it is FB's fault, but I have the least amount of problems with Firefox.
"I really need a new tagline"
—P M Evans