1)Take a screenshot of your updates on the iTunes library and close iTunes and keep the screenshot open to see which updates you need.
2)Launch iMazing and select your device connected via usb and click Manage Apps
You will be ask to Sign-in on your iTunes account.
3)You will get a screen: select Library and then click on the cloud sign
(Red arrow) to download the app you need
Once the app has been downloaded you will see the "Download available" changing to
the app release number. (Blue arrow)
4) Move the original app from the iTunes library to another disk if you want to keep the old app in case
you need to go back for any reason- Moving to a folder on the same disk is not enough because iTunes is still able to mess it up.
5)From iMazing drag the app you just dowloaded to the iTunes library
Do it for all apps you need to update
6)Close iMazing and reopen iTunes
iTunes will not automatically recognize the update but if you
7)Option- click on the app to update on the iTunes window and click Show in finder it will not be able to locate it.
Click locate and go to the folder of your library: select the new app and you will see the update on the iTunes screen disappear. Success !
Do it for as many apps you need to update
Then sync your devices as usual and you will see iTunes working as the good old time.
It is a lot of work 😟 but for now is the only solution I found
The good news is after the first few times it will be faster.
Another solution could be to use iMazing for backups and updates and forget iTunes.
I'm not ready yet, for now.
Maybe there is a faster step to make iTunes to recognize all the updated apps, I don't know
P.s.Remember to clean time to time the iMazing folder in
~user-library-App support-iMazing-Backups-Library-Apps
The first time you will launch it, iMazing will create tons of icons too, this is why it takes sometime to have all the apps to update displayed. It duplicates many of them too. If you have tons of space on your hd it's ok, if not delete that one too and the first time it will spin the wheel again...