JF Mezei <
jfmezei...@vaxination.ca> wrote:
> On 2018-10-10 19:34, David Empson wrote:
>
> > Under no circumstances (short of jailbreaking) will iOS 9 or later allow
> > an app to be copied FROM the device.
>
> Do we know what version of IOS is running on the OP's handset?
Do we know that you don't bother to do the barest minimum of research
before asking questions?
Yes to both.
In the original post in this thread, Ant said his iPhone 4S is running
iOS 9.3.5.
> i agree that if he deleted the app from the phone, and can't redownload
> it from App store and no backup made of the .IPA (back when they were
> possible via iTunes), then there is no way.
>
> > I've tested it with iMazing, and that doesn't work either.
>
> I can understand the iTunes OS-X app no longer pulling .ipa from phone
> during a sync, but am surprised that the existing iTunes protocol code
> would have been changed to remove that ability.
The protocol did not change: iOS 9 simply prevents apps being copied
from the device, probably something like returning an error when the
copy is attempted, effectively a permission violation.
iTunes versions released after iOS 9 retained the ability to sync apps
from devices that were running iOS 8 or earlier. I tested it two or
three years ago and haven't tried again more recently but I expect it is
still there up to iTunes 12.6.x.
> Was there much fraud with .ipa files being distributed to people who
> didn't buy the apps? Or would the signing mechanisms have made this moot
> because a stolen .ipa wouldn't work on a phone with anothet apple ID ?
You can use apps from another Apple ID. The device asks you for the
Apple ID and password. Therefore to use someone else's copy of the app
you need their Apple ID and password, which would be a violation of
their licence agreement.
(I've used this feature with apps obtained under multiple Apple IDs of
my own.)
As I and others have already said multiple times in this thread, the
reason for the block is that once iOS 9 was released, a rapidly growing
proportion of apps were using the App Thinning feature, and those apps
are not viable for transferring to an iTunes library because they would
be incompatible with other models, therefore no use for people who had a
mixture of devices or who ever wanted to upgrade to a newer device.
Allowing copying only for a limited and shrinking subset of apps that
weren't thinned doesn't lead to a good user experience, so it made more
sense to completely block app copying from the device.
At that point iTunes could still get the apps from App Store for those
who wanted to keep using iTunes to manage apps.
Since then, Apple clearly obsered that app management with iTunes was
used by a shrinking proportion of the user base, eventually leading to
App Store and app management being removed from the mainstream version
of iTunes (but retained for a subset of users who still needed it by
keeping an older version available for a while with minimal updates).
--
David Empson
dem...@actrix.gen.nz