I have downloaded applicationloader_1.3.dmg
and installed in the destination Macintosh HD.
The messages show The installation was successfully done. Bu
With Application Loader now gone from Xcode I had a look around to see how to upload an .ipa file, since I use UE4 and I don't touch Xcode at all during development. Turns out it's pretty hidden away, You need to go to Window, Organiser, Archives. The archive will only appear if you ticked the "Generate Xcode Archive Package" tickbox in Project Settings. Then you just click Distribute and it's just does it.
You can download Application Loader from Itunes Connect.
At the time of writing, this link is: https://itunesconnect.apple.com/apploader/ApplicationLoader_3.1.dmg
Application Loader now moved to tools
https://itunespartner.apple.com/en/apps/tools