To facilitate its uninstallation, Adobe has set up alerts that are displayed directly on the screen of Windows and MacOS machines where the utility is still installed. If you see, or have seen, this alert appear, take advantage of it to initiate the immediate uninstallation of the plug-in. To do so, simply click on the Uninstall button and follow the procedure indicated.
Start by downloading the Flash uninstall utility on your machine. This is an official tool provided by Adobe to allow users to properly uninstall Flash from their computer.
Mac OS X, version 10.6 and later: uninstall_flash_player_osx.dmg
Mac OS X, version 10.4 and 10.5: uninstall_flash_player_osx.dmg
Once the Flash uninstall tool has been downloaded to your machine, run the file. In the window that appears, simply click the Uninstall button.
Click the Done button and restart your machine. Your operating system should now be cleared of this security vulnerability plug-in.