iTunes Enterprise 12.6.5.3 Fails to download apps

I’m also have if the same issue. Worked fine 7 Feb and then the error when I tried to do app updates on 9 Feb. from what I can tell I get the 8288 error when I initially download and then the 416 error when I retry the download. I checked the downloaded file size and it appears to download it all but it’s like iTunes isn’t converting the file from .app to .ipa I think it is. I contacted Apple support and he had me uninstall/reinstall iTunes but it didn’t work. He was supposed to call me back at 4 pm yesterday but didn’t. Afraid they are dumping the business edition of iTunes so we won’t have app support any longer.

Ditto for me as well--I noticed it this past Saturday 2/9 but for all I know the issue may have reared its head before then as OP noted but I can say that whatever is causing it, it apparently started some time after 2/1 which was the last time I was able to successfully update my apps via iTunes 12.6.5. I thought that maybe something changed on my Windows PC so I installed iTunes 12.6.5 on my Windows laptop and tried it there--same failed result. I then thought maybe it's something with my router but if other folks are experiencing the same issue, then I kinda doubt that the issue lies with my router.

I should also mention that even with the failed attempt it does download the app but with an .app extension and is not zero bytes in size, however of course iTunes does not recognize it as a valid IPA file. I should also add that I am able to download new podcasts; I didn't try to download a song though to see if it occurs with music as well.

Huh? Wait, this thread is about not being able to download apps on iTunes 12.6.5.3 yet your post implies that you are able to do so. Or are you saying that you can't download apps you've never downloaded or purchased before but are able to download app updates for apps you've previously downloaded? FWIW I get the error regardless of whether I attempt to download an app update or an never-before downloaded one.

Update--nvm, I read your reply in the other thread where you're running that version w/o issue on High Sierra.

After experiencing the same issue on multiple machines with the same operating system and iTunes versions i spoke with an experienced Apple Enterprise Support team member. They provided a solution with seems the be simplicity itself after two days of careful consultation and screen sharing. By the way, they couldn't reproduce the problem from their end, hence the feeling the the account file itself might be the culprit. It is not an app version blocking issue per-se, more an iTunes/Apple Account security 'feature'. If your account details or payment methods have been flagged for 'non-authorised activity' or 'suspicious transactions' it maybe suspended (without notification or human intervention) until such times as your ID is re-established and the flag removed. Sometimes this flagging can occur well after the said suspicious event (weeks, months). I my case i had multiple Apple accounts in several countries. Only one of which had the 'update error 8288' issue. This one account had been not been flagged as needing ID verification strangely. After changing the account payment method to "NONE' and then re-entering the required credit card details, the Enterprise rep verified my ID using the 3 questions set when the account was first created. Violå. Problem solved in this instance. All updates completed successfully and all machines. The Mac operating version or iTunes version was not really the issue in my case.

I don't know if the issue has been solved but I got early today error 8003 when trying to download multiple apps. After restarting iTunes I updated a single app, Adobe Photoshop Express without problems. I disabled multiple downloads in the app update box. Until now the updated apps are being downloaded successfully. I'm using the app Store from Mexico.

I have the same issues and errors. Our only hope is that some large companies will complain. Maybe Apple will listen to them

Exact same issue on the exact same day, I have tried everything as you have and no solution. Very frustrating.

Same issue here.

The .app files in my Mobile Applications folder all have filesize = zero bytes.

Same issue here.

The .app files in my Mobile Applications folder all have filesize = zero bytes. and versions Twitter 1.app, Twitter 2.app, Twitter 3.app

What if any third party AV do you have? Can you exclude the iTunes folder from its real-time scanner, and if so does that help?

tt2

Yep, I'm in that thread too. Clearly something is up, and yet I can download app updates in 12.6.5.3. Go figure.

tt2

I have analyzed the orphaned .app file. It basically consists of Zero-bytes only. This looks more like a server hiccup than intentional blocking of older iTunes versions.

Try downloading now...There was a report in the Mac thread about success.

I tried and downloaded a couple of apps without issue.

All 43 remaining app updates downloaded without issue.