Made the mistake updating my macbook to Big Sur yesterday.
Suddenly my custom AIR Clients stopped working becasue airsdk is not avalible by adobe
Lucky found this post:
to this download: https://airsdk.harman.com/download
You can download a v33 of the AIR SDK.
And move:
AIRSDK_MacOS/runtimes/air/mac/Adobe AIR.framework/
to the right directory in macOS:
/Library/Frameworks/Adobe AIR.framework/
delete the old one first.
Was almost reinstalling my macbook. Hope this wil help someone else.