Hello, I have the exact same problem and posted a longer, more detailed question but have received no answer or help yet from any form of support or the community. I have done all the steps on the various Adobe "help" pages; uninstalled the old version; deleted all old Adobe Flash remnants/downloads; contacted Apple Customer Care twice and went through a battery of options, tests, trials to make sure it was nothing on my laptop or an Apple problem at all. Despite all these attempts in every way possible, nothing has worked, I have no Flash Player, and I cannot do things I need to--one for example, my language study on Rosetta Stone because it requires Flash Player. I am very open to help and would love to hear from an experienced, qualified person(s) who could give a real, practical and timely solution to this problem. And please, do not send me to a link to the forum or page of "solutions" as I have gone there many times, tried it all, and still no installation--just a generic error message and the suggestion to try again.
Hopeful for help~