The instructions below reference specific versions of the Flex and AIR SDKs: Flex SDK 4.6.0 and AIR SDK 3.4. The instructions, however, are general. You can follow these instructions to overlay any version of the AIR SDK on any version of the Flex SDK.
Note:
If the Flex SDK is newer than the AIR SDK, it can rely on AIR functionality that isn't present, resulting in compile-time or runtime errors.
Download the appropriate AIR SDK file for your operating system from www.adobe.com/products/air/sdk/, and save it to the root directory of the Flex SDK.
Windows: AIR34_win_sdk_XXXXXX.zip
Mac OS: AIR34_mac_sdk_XXXXXX.tbz2
Extract the contents of the AIR SDK archive and overwrite the existing SDK files.
Windows: Right-click the ZIP file and select Extract All, or use a decompression tool of your choice.
Mac OS: In Terminal, cd to the root directory of the Flex SDK and run this command:
- tar jxvf AIR34_mac_sdk_XXXXXX.tbz2
If you have trouble overwriting files due to file permissions, try this command:
- sudo tar jxvf AIR34_mac_sdk_XXXXXX.tbz2
(Optional) To ensure that the output SWF file targets SWF version 17, pass an additional compiler argument: -swf-version=17.
For detailed instructions, see this article.

