Cannot install iOS 10

Yes, sorry - I forgot to mention that.

This may sound really basic...but have you tried a different Lightning cable? Error 1 is usually triggered as a hardware level problem and faulty connection would fall into that.

From an Apple support document:

Check for hardware issues

If you see error 53, learn what to do. If you see one of the errors below, you might have a hardware issue:

1, 3, 10, 11, 12, 13, 14, 16

20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 56

1002, 1004, 1011, 1012, 1014, 1667 1669

Here's what to check:

Make sure that you have the latest version of iTunes.

Check for issues with third-party security software.

Make sure that your USB cable, computer, and network are reliable. Then try twice more to restore your iPhone, iPad, or iPod.

If you still see the error message, you can check for outdated or modified software or contact Apple Support.

Did anyone with installation issues try the provisioning profile listed with the ipsw's on the beta download page? I didn't need to install the XCode 8 beta. I installed the beta provisioning profile, then option-clicked upgrade in iTunes, selected the iOS10 Beta ipsw, and it worked. Perhaps that's what the XCode beta takes care of otherwise. Let me us know if that helps.

I had the same issue, so I restored to a factory version of the 9.3.x and did NOT restory my content from backup. I then installed iOS 10 and once that worked it restored my content from my backup. Other than having to sync all of my Music, seems to be working well.

Thanks for the suggestion. The cable was the original one that came with my iPad Pro. However, I tried a different one and I'm still getting the same error.

Console output below:

6/14/16 7:19:40.650 PM iTunes[2297]: Entered:_AMRecoveryDeviceConnected, libusbrestore-device:0xCC9195F0

6/14/16 7:19:40.650 PM iTunes[2297]: Entered:__thr_AMRecoveryDeviceConnected, libusbrestore-device:0xCC9195F0

6/14/16 7:19:43.632 PM iTunes[2297]: Entered:_AMMuxedDeviceDisconnected, mux-device:11

6/14/16 7:19:43.632 PM iTunes[2297]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:11

6/14/16 7:19:43.632 PM iTunes[2297]: tid:1fb87 - Mux ID not found in mapping dictionary

6/14/16 7:19:43.633 PM iTunes[2297]: tid:1fb87 - Can't handle disconnect with invalid ecid

6/14/16 7:19:59.176 PM iTunes[2297]: tid:14c27 - Created state machine for device with ECID=0x28F38226

6/14/16 7:19:59.176 PM iTunes[2297]: tid:14c27 - State Machine Dump, status:RUNNING - [state:Recovery remaining-cycles:2 (current state)] -> [state:RestoreOS remaining-cycles:1]

6/14/16 7:19:59.183 PM iTunes[2297]: tid:1c62b - no override trust object found

6/14/16 7:19:59.496 PM iTunes[2297]: tid:1c62b - amai: AMAuthInstallRequestSendSync: SSO function returned NULL and no SSO token was provided, SSO disabled.

6/14/16 7:20:04.490 PM iTunes[2297]: tid:16903 - iTunes: OS-mode device appeared, device 0x7fa4cca0c2c0

6/14/16 7:20:04.490 PM iTunes[2297]: tid:16903 - iTunes: device 0x7fa4cca0c2c0 doesn't have USB interface; ignoring

6/14/16 7:20:10.946 PM iTunes[2297]: Entered:_AMMuxedDeviceDisconnected, mux-device:12

6/14/16 7:20:10.946 PM iTunes[2297]: tid:16903 - received kAMDeviceDetached action, device id 4534F08A22DB66FB (0x7fa4cca0c2c0)

6/14/16 7:20:10.946 PM iTunes[2297]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:12

6/14/16 7:20:10.947 PM iTunes[2297]: tid:25a0b - Mux ID not found in mapping dictionary

6/14/16 7:20:10.947 PM iTunes[2297]: tid:25a0b - Can't handle disconnect with invalid ecid

6/14/16 7:20:31.901 PM iTunes[2297]: tid:16903 - iTunes: OS-mode device appeared, device 0x7fa4cfb8b250

6/14/16 7:20:31.902 PM iTunes[2297]: tid:16903 - iTunes: device 0x7fa4cfb8b250 doesn't have USB interface; ignoring

6/14/16 7:20:38.274 PM iTunes[2297]: Entered:_AMMuxedDeviceDisconnected, mux-device:13

6/14/16 7:20:38.274 PM iTunes[2297]: tid:16903 - received kAMDeviceDetached action, device id 4534F08A22DB66FB (0x7fa4cfb8b250)

6/14/16 7:20:38.274 PM iTunes[2297]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:13

6/14/16 7:20:38.274 PM iTunes[2297]: tid:1fb8b - Mux ID not found in mapping dictionary

6/14/16 7:20:38.274 PM iTunes[2297]: tid:1fb8b - Can't handle disconnect with invalid ecid

6/14/16 7:20:58.317 PM iTunes[2297]: Entered:_AMMuxedDeviceDisconnected, mux-device:14

6/14/16 7:20:58.318 PM iTunes[2297]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:14

6/14/16 7:20:58.318 PM iTunes[2297]: tid:1355b - Mux ID not found in mapping dictionary

6/14/16 7:20:58.318 PM iTunes[2297]: tid:1355b - Can't handle disconnect with invalid ecid

6/14/16 7:21:04.249 PM iTunes[2297]: tid:16903 - iTunes: OS-mode device appeared, device 0x7fa4ccb10630

6/14/16 7:21:04.249 PM iTunes[2297]: tid:16903 - iTunes: device 0x7fa4ccb10630 doesn't have USB interface; ignoring

6/14/16 7:21:13.024 PM iTunes[2297]: tid:16903 - received kAMDeviceDetached action, device id 4534F08A22DB66FB (0x7fa4ccb10630)

6/14/16 7:21:13.025 PM iTunes[2297]: Entered:_AMMuxedDeviceDisconnected, mux-device:15

6/14/16 7:21:13.025 PM iTunes[2297]: Entered:__thr_AMMuxedDeviceDisconnected, mux-device:15

6/14/16 7:21:13.025 PM iTunes[2297]: tid:2621f - Mux ID not found in mapping dictionary

6/14/16 7:21:13.025 PM iTunes[2297]: tid:2621f - Can't handle disconnect with invalid ecid

6/14/16 7:21:15.093 PM iTunes[2297]: tid:1c62b - amai: tss_submit_job: SendHttpRequest failed -1

6/14/16 7:21:15.093 PM iTunes[2297]: tid:1c62b - amai: AMAuthInstallRequestSendSync: failed tss submission:

6/14/16 7:21:15.094 PM iTunes[2297]: tid:1c62b - amai: AMAuthInstallApCreatePersonalizedResponse: server request error:

6/14/16 7:21:15.094 PM iTunes[2297]: tid:1c62b - amai: AMAuthInstallBundlePersonalizePartial: failed to create ap ticket

6/14/16 7:21:15.094 PM iTunes[2297]: tid:1c62b - failed to personalize the restore bundle:

6/14/16 7:21:15.095 PM iTunes[2297]: tid:1c62b - AMRecoveryModeDeviceCopyAuthInstallPreflightOptions: failed to personalize bundle

6/14/16 7:21:15.095 PM iTunes[2297]: tid:1c62b - Failed to copy preflight options during recovery mode restore.

6/14/16 7:21:15.095 PM iTunes[2297]: tid:1c62b - State Machine Dump, status:ERROR - [state:Recovery remaining-cycles:1 (current state)] -> [state:RestoreOS remaining-cycles:1]

6/14/16 7:21:15.095 PM iTunes[2297]: tid:1c62b - State is now set to error

6/14/16 7:21:15.095 PM iTunes[2297]: tid:1c62b - Device isn't booted but USB is up.

6/14/16 7:21:15.096 PM iTunes[2297]: tid:1c62b - Can't stop watching device log we're not watching

6/14/16 7:21:15.096 PM iTunes[2297]: tid:1c62b - amai: AMAuthInstallPlatformRemoveDirectory: failed to remove directory: No such file or directory

6/14/16 7:21:15.096 PM iTunes[2297]: tid:1c62b - Failed to remove directory file:///tmp/PersonalizedBundle_F211E7E2-CBE6-4E01-AC8E-6C9181D5F358

6/14/16 7:21:15.644 PM iTunes[2297]: tid:14c27 - iTunes: Restore error 4294967295

Hello,

Yes, I installed that as well as the XCode 8 beta. I then option-clicked as you did and it failed. iPad Pro is unusable and won't upgrade or downgrade.😠

No. It turned out that installing Xcode 8 beta on OS X 10.11 El Capitan didn't solve the installation issue. 😟

I tried again with "Update" button not "Restore iPad..." ( of course, I pressed Option key.)
it still failed.

Previously, I tried with "Restore iPad..."

Probably they didn't test sufficiently for iPad mini 2.

Anyone have a solution for this issue? One of our test iPhone 6 is having the same issue.

Yes XCode8 been installed.

There is no need to install Xcode beta. I downloaded the mobile config to get that onto my old iPhone 5 I just used airdrop. After the install I could see the beta profile, however the update was for IOS 9.x so I let it install that, after which I rebooted the phone again then whent to setting checked for updates and voila. iOS 10 was ready to install.

Same.

Same problem on my iPhone 6 with 9.3.2, tried updating to 9.3.3 beta THEN going to 10, still no luck. Anybody figure anything out?

As I found no working solution I used the Restore Image to install iOS 10. I recommend you to read the iOS beta Software Installation Guide before doing that.

eenter DFU mode, with the device connected to the itunes with the cord. Press the home and power button for ten seconds and then let off the power button while still holding the home button and you will see it pop up in iTunes that you must restore! Hit restore and wait for it to be back to the setup screen.

How do you instal the Xcode 8 beta ?

I was using the profile to install the beta on an iphone6 but my install is stuck @ activation. I'm now installing xcode 8 beta and then trying again... not sure if it makes a difference