After the latest Safari update (version 8.0.2) for Mac, I received a message that Flash Player was out of date. I downloaded the latest Flash DMG file and when updating it stalls at 32%. Running the latest update for Yosemite.
I've uninstalled all of Flash player and all files and folders related to Adobe Flash from the computer. I've turned off my anti-virus and firewall. It continues to stall at 32%. I've re-downloaded the flash update and continue to have the problem.