There is a Flash exploit in the wild that WILL WORK on PowerPC Macs. There is no fix to this on PowerPC other than to 100% stop using Flash. This includes the spoofed/hacked version that is floating around. http://tenfourfox.blogspot.com/2014/07/its-time-to-stop-using-flash-on-power.html And if you need help living without Flash, we have a forum topic all about it! http://forums.macrumors.com/showthread.php?t=1496149 Or you can use the QuickTime Enabler or Mactubes Enabler on TenFourFox. EDIT 7/10: How to get around not using Flash 1. Use TenFourFox with QuickTime Enabler or Mactubes Enabler 2. Use MacTubes or Youview. 3. Use Leopard WebKit with both ClickToFlash and ClickToPlugin. 4. Use the Developer Menu to spoof the site into thinking you're on a mobile device.