I cannot watch anything on Mac 10.9, as it says i need to install the new version of Adobe. When i try and install your version 12, it gets to 50% of the download and then says unable to complete installation. i have already tried to disintall and re-install and its not working.
Download the FULL offline installer: Flash Player Plug-in (Mac OS X)
Save it and quit Safari
Double click the DMG to mount it. It will open a window with the installer - DO NOT RUN IT!!!!
Right click and "Show Package Contents"
In Contents/Resources, double click the Adobe Flash Player.pkg
Follow the steps to run the COCOA installer
Eject the DMG and you're finished.