Black Hole
May contain traces of nut
...and thee next question I need to look into is whether I can "downgrade" the iPad Air I have acquired for an eldery friend to iOS7!
I think someone has already mentioned but you are unlikely to have any luck as Apple have now stopped signing this. If you backed up your signing certificate before upgrade you can do it but otherwise... - see https://www.theiphonewiki.com/wiki/SHSHI'll see if I can get back to iOS7 from a back-up.
Yes, itunes talks to Apple to fetch a signing certificate specific to your device and they are no longer issuing certificates for version 7 and modern-ish iPads.Does this mean that even a local restore process somehow goes out to Apple for authorisation?
Does that apply to all ad blockers? I'm running an iPad3, so if this is saying iOS9 is optimised for 64-bit, no wonder I'm having a hard time (and Apple should not have approved 9 for anything less than an Air).You’ll need to be running an iOS 9 device with a 64-bit chip. On the iPhone side, that’s the iPhone 5s or later. For iPad users, that’s the iPad Air, iPad Air 2, and the iPad mini 2 and later.