While publish via Xcode: A downloaded software component is corrupted and will not be used

Goto Terminal (command-line) and run this command. This command updates the components from Apple server.

"/Applications/Xcode.app/Contents/Applications/Application Loader.app/Contents/itms/bin/iTMSTransporter"

Output of command show: INFO: Transporter is searching for new software components. INFO: Downloading com.apple.transporter.mediatoolkit/1.13.0...

Try to publish app now. Should work.

For Xcode 11 and above, Application loader is a separated app called Transporter

To update transporter components write this

/Applications/Transporter.app/Contents/itms/bin/iTMSTransporter

Note: If you encountered error like this

...
.......
<main>  INFO: indexing file: /Users/<YOUR USER>/Library/Caches/com.apple.amp.itmstransporter/obr/2.0.0/org.apache.tika.core-1.18.0.jar
<main>  INFO: indexing file: /Users/<YOUR USER>/Library/Caches/com.apple.amp.itmstransporter/obr/2.0.0/com.apple.transporter.aspera-linux-x64-3.9.1.2019-07-18-1737-EST.jar
<main>  INFO: indexing file: /Users/<YOUR USER>/Library/Caches/com.apple.amp.itmstransporter/obr/2.0.0/com.fasterxml.jackson.dataformat.jackson-dataformat-xml-2.9.6.jar
<main>  INFO: Update check complete.
<main> ERROR:   unsatisfied requirement: com.apple.transporter.mediatoolkit
<main> ERROR:        (&(package=com.apple.its.epubcheck)(version>=4.3.0)(!(version>=5.0.0)))
<main> ERROR:   unsatisfied requirement: com.apple.transporter.aspera-linux-x64
<main> ERROR:        (&(osgi.native.osname~=Linux)(osgi.native.processor~=x86-64))
<main> ERROR: could not find the service with interface (com.apple.transporter.osgi.TransporterService)

write this command

cd ~
mv .itmstransporter/ .old_itmstransporter/

Then repeat the first command

References: One Two

Open termina and copy past please use following command

cd mv .itmstransporter/ .old_itmstransporter/
"/Applications/Xcode.app/Contents/Applications/Application Loader.app/Contents/itms/bin/iTMSTransporter"

this is work for me.

see this update from apple:

https://stackoverflow.com/a/58407699/585749

Available in the Mac AppStore

Transporter: https://apps.apple.com/us/app/transporter/id1450874784?mt=12

Tried to re-upload the binary again and it worked without doing any changes to it :-) First time it did not, but the second time it was uploaded.

When uploaded, triggered this issue: ITMS-90381: Too many symbol files - These symbols have no corresponding slice in any binary [1563DEE7-9CA4-3E32-A685-59C6096A7559.symbols, 0C5A429A-9899-3DBC-B2BF-130063489259.symbols

Need to Google that to see it can be resolved! :-) but it's just a warning, the binary was accepted.