CS3 may not run on the newest Mac operating system, CS3 is nearly 10 years old and hasn't been tested on modern operating systems. Help! I've Lost My Serial Number. - CreativePro Network
Legacy installers are a favorite hiding spot for trojans. adobe fireworks cs3 serial number
If you previously purchased Fireworks CS3, Adobe used to provide a "special" version of the installer that did not require activation, along with a universal serial number for existing customers. You can check your under "Order History" to see if your legacy downloads are still accessible. Modern Alternatives to Fireworks CS3 may not run on the newest Mac