We would like to advise that Sothink SWF Decompiler for Mac is a professional SWF to FLA, SWF to FLEX project converter on Mac OS X. This Flash decompiler can convert one or more SWF to FLA, SWF to FLEX project and extract elements into the various formats at one time. It supports Flash 6, Flash MX 2004 , Flash 8, Flash CS3 and Flash CS4. The Flash Decompiler Mac is compatible with both ActionScript 2 and ActionScript 3 completely.
http://www.sothink.com/product/flash-de ... /index.htm
However, Sothink SWF Decompiler for Mac itself does not support editing files, but you can edit the generated FLA file with Adobe Flash program.
Thanks for your concern and have a nice day!