If you're using an out-of-date version of the Adobe Flash Player plug-in, you may see the message “Blocked plug-in,” “Flash Security Alert,” or “Flash out-of-date” when attempting to view Flash content in Safari.

I tried to update adobe flash to 10.1 (I heard from a forum flash 10.3 is not the one for my system, not sure if this is true) The os and safari have just been updated after experiencing slow loading speeds when playing a video on utube.

Clicking the indicator displays a message that Adobe Flash Player is out of date:

To continue viewing Flash content, update to a later version of Adobe Flash Player:

Adobe Flash Player Update For Mac

1. Click the Download Flash button. Safari opens the Adobe Flash Player page on the Adobe website.
2. Follow the instructions on the Adobe website to download and install the latest version of the plug-in.

If you need to use an older version of Flash Player, you can use Internet plug-in management in Safari to run the plug-in in unsafe mode for websites that you trust.

Adobe Flash Player Update For Mac Is It Safe

Contact Adobe if you need help downloading, installing, or using Adobe Flash Player.