I downloaded the latest version of the Adobe flash player. Otherwise my mac (version 10.9.2.) won't play any videos etc. on the internet.
I have tried quite some stuff. I followed the whole Adobe guideline and made sure I did not have any version of Adobe flash player on my macbook anymore. After that I run a clean installation of the latest Adobe flash player, but still it stops at 75% saying 'unable to install'.
I hope somebody or adobe has fix for this problem. Maybe time for adobe to update the latest version of flash player...