Why Xcode 9.2 is not recognising trusted IOS 9.3.5 devices?

Question

I updated to Xcode 9.2 recently, and it is not recognising trusted IOS 9.3.5 device, a really old ipad. Can anyone suggest a workaround? Thanks in Advance.

Update: Also tried connecting to a 11.2.1 Ipad mini. Its also being shown as untrusted device.

This happens in xcode(for ipad mini4 - trusted when prompted device)

This happens in iTunes, where the device is still not being recognized even after trusting the mac.

Answer 1

This

Answer worked for me.

After you delete that folder, you need to recreate again and make proper permissions, because iTunes need rw rights to that folder:

 sudo mkdir /var/db/lockdown
 sudo chmod go+w  /var/db/lockdown

without having iTunes open. Then everything should be fine. Also keep in mind the same operation may be required for /private/var/db/lockdown [a mirror]

Answer 2

Could be an issue with provisioning profile/developer certificates:

Are the devices included as part of the provisioning profile? And, is the provisioning profile still active? If so, it could also be that you need to go to General -> Profiles and Device Management to trust the developer certificates.