Eltima Software (http://www.eltima.com) has updated Flash Optimizer for Mac, a SWF (Shockwave file) compression utility, to version 2.4, adding support for Flash CS5
Flash Optimizer for Mac compresses not just separate parts of SWF, but the whole file including curves, zero objects and more. It’s customizable and gives the user full control over the compression process.
Flash Optimizer for Mac costs US$99.95. Version 2.4 is a free update for registered users of version 2.x.