Launch the uninstaller from your Downloads folder on your Mac. Enter your admin password and close all your browsers. You will have to close any programs that also require Flash before you can install the update, click Close All 12. You may also see the alert: "Blocked Plug-in" when attempting to view Flash content in Safari. By stopping older versions of Flash from running Apple is able to guard against security vulnerabilities that could allow malware to be delivered to your Mac via Flash Player.
When the uninstaller has finished it is also wise to delete a couple of folders, according to Adobe. This window appears whenever you download an app from the internet, it’s designed to protect you if the app might not be legitimate. You might be glad to see the back of Flash if it means you don’t have to watch web ads, but many of the UK on demand channels still use it, such as All4.
Flash is frequently used for advertisements and games.
This wiki page describes how to install the Adobe Flash Player, formerly known as the Macromedia Flash Player, on Debian systems.
The security flaws have affected Flash for Windows, Mac and Linux.
With Flash already assigned to history, these vulnerabilities aren’t helping its survival.
Suggesting Apple no longer wants its customers to be exposed to Flash vulnerabilities and wants you running on HTML5, the newer, safer way of browsing the web. There’s a different version depending on the age of your operating system.