We just released a minor update to the App Submission flow that will simplify the activation process. Previously in the "Submit to Airspace" page, you could combine both platforms App Details and Binaries in a single combined submission. This is a great feature, however, it would cause accidental deactivation of platforms if a future submission only contained one of the platforms. For example, if only the Windows version was submitted in an update, it would be activated on Airspace, which would deactivate the previous submission containing both the Windows and OSX versions. At this point, only the Windows platform is active orphaning the OSX platform.
To fix this issue, we have modified the "Submit to Airspace" page to use single drop-down lists for App Details and Binaries.
Simply click each drop-down to see the list of available App Details and Binaries and choose the appropriate version. Once chosen, fill out the rest of the info and click "Create submission".
Repeat these steps for each platform and you are all set.
Note: For those who have been already submitting each platform separately, keep up the good work.