Go to: https://get.adobe.com/flashplayer/otherversions/ Step 1 - Select an Operating System ex: macOSX 10.13 Step 2 – Select a Version ex: FP 28 Mac for Safari and Firefox – NPAPI (the emWave games use this one) Step 3 – Download the program Don’t try to install it yet, use the instructions below first. Enable Flash Player in Safari:
Open Safari, and choose Safari > Preferences.
Click the Websites tab and scroll down to the Plug-ins section. ...
Click the check-box to enable Flash Player.
For 'When visiting other websites' setting, select the option of your choosing: Ask, Off, or On. We recommend choosing – On
Once this has been completed, go back to your Downloads folder in Safari and double-click the Flash Player installer file and install the program.