Cannot update Flash player on Mavericks or Yosemite?

Due to SpeedTest.net not working, I decided to try updating Flash Player again, and it worked! I was finally able to upgrade to version 17 from the first release of version 16.

I would also suggest trying to extract the .app from the .dmg first for anyone else with issues. OS X seems to handle security differently based on the location of the .app.

Use the offline installer http://download.macromedia.com/pub/flashplayer/current/support/install_flash_player_osx.dmg

Same issue. I am on Yosemite (10.10).

Unfortunately I am having the very same issue, (and it's been about a month now). I have tried just about everything and still no luck. If you are able to resolve the problem please post how you were able to do so.

I doubt you'll get much response from Adobe, but I can tell you that Flash player will absolutely not install on Yosemite. I've broken apart the installer apps and tried running the MacOS component with sudo, taken the standalone installer package apart with Pacifist and messed with this for hours. It will not install. See this thread where I report my findings:

https://forums.adobe.com/message/6846582#6846582

The installer is flawed, proper tools to uncompress the plug-in are not present, etc. I can't raise any response and have simply left it uninstalled, since there isn't another option.