awful_flash_hack.sh

#!/bin/bash
echo "Deleting the Xprotect blacklisted plugins and Disabling the Xprotect updater so that old versions of Flash still work"
echo "This is a truly terrible idea and you should be ashamed if you implement it on any computer that you don't mind being a massive sinkhole of security doom"
echo "No, really, don't do this unless you hate yourself and your private information and your lack of viruses"
sudo /usr/libexec/PlistBuddy -c "Delete :PlugInBlacklist" /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/XProtect.meta.plist
/bin/launchctl unload -w /System/Library/LaunchDaemons/com.apple.xprotectupdater.plist