I wanted to compile all of the helpful information regarding lack of Flash 9 support in Adobe Flash Pro CC.
As you know that Flash 9 is still required for a majority of flash adverts and the DFP platform is especially critical of the flash version on a SWF creative.
Currently in Flash Pro CC the lowest version of flash you can save as is 10.3. Even when you do export a SWF as Flash 10.3, DFP and the DoubleClick validator reports the exported file as Flash 12.
DoubleClick Flash Validator ( Awesome for verifying clicktags and Flash versions ):
After numerous searches, I found this discussion on the here on the forums that properly addresses the issue and how to implement the fix on a PC & Mac:
Can Flash Pro CC publish to flash player 9??
Thanks to Kglad for providing all the information on this awesome fix.
Thanks to Jarkko Syrjälä for providing the information on the MAC directories.
For PC users you are going to need to locate the directories below:
C:\Program Files\Adobe\Adobe Flash CC\Common\Configuration\Players\FlashPlayer9_0.xml
C:\Program Files\Adobe\Adobe Flash CC\Common\Configuration\ActionScript 3.0\FP9\playerglobal.swc
Note: The FP9 folder does not exist in the "ActionScript 3.0" directory, you will need to create it and place the "playerglobal.swc" located on the attached "Windows Flash CC FP9 Assets.zip".
For MAC users you are going to need to locate the directories below:
/Applications/Adobe Flash CC/Adobe Flash CC.app/Contents/Common/Configuration/Players/FlashPlayer9_0.xml
/Applications/Adobe Flash CC/Adobe Flash CC.app/Contents/Common/Configuration/ActionScript 3.0/FP9/playerglobal.swc
To navigate inside "Adobe Flash CC.app" in Finder, you need to right click it and select "Show Package Content".
Note: The FP9 folder does not exist in the "ActionScript 3.0" directory, you will need to create it and place the "playerglobal.swc" located on the attached "MAC Flash CC FP9 Assets.zip".
Dropbox link to the assets: https://www.dropbox.com/sh/1sfyv5fxac1d7ob/yYYZI8Nwe4
Below is a screen capture of my Flash CC on my MAC displaying the Flash 9 option:
Hope this helps!