If you need to use an older version of Flash Player, you can use in Safari to run the plug-in in unsafe mode for websites that you trust.
Follow the instructions on the Adobe website to download and install the latest version of the plug-in.Safari opens the Adobe Flash Player page on the Adobe website. 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: 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.