If you are using our built in uploader and are having problems, can you run this command from the terminal:
defaults write com.coronalabs.Corona_Simulator debugBuildProcess 3
Then send us the whole log file (CMD-A, CMD-C from the terminal window, CMD-V in the forum post reply).
If you’re not using our built in uploader, then this is an Apple problem since we just run whatever the default Application Loader is on your computer and we don’t pass any parameters and such.
Rob