When I click on videos of news/sports items, they do not play on my mac and some content is not visible onmy a browser. I get messages saying I need to download the newest "Flash player" software. I do this, but it never seems to actually install even though I go through the install steps. Do I somehow have this feature/software turned off or what is my problem wth my Imac not utilizing the flash player software? Thanks for any help.
Have you tried with a different User account, after that I would try my previous suggestion of removing flash repair permissions and try again. Make sure that Flash gets removed from the /Library/Internet Plugins/ directory.
It may be worth while to check with something such has AppZapper that all traces of the software are removed before repairing permissions and reinstalling.