I have 15 max pro and i kept getting the 1109 error and i had no backup so i needed to do an DFU restore which is just restoring in recovery mode. If you have done everything in that Apple suggests, Try these things before making any more network changes and sending yourself mad:
I actually think step 3 might be the first thing to do if you have followed all of the suggestions made by Apple. 1109 is a communication error. The application also needs to be able to access its own files as well as Apple servers which is like a network file sharing issue when connected to a multi device network.
- Check that you can connect to *** If it says the connection isn't private there is a trusted root certificate Issue. You can use this *** from windows to navigate that.
- Make sure the Hosts file is not blocking the connection. The Hosts file is generally located here "C:\Windows\system32\drivers\etc". Copy and rename it Hostsold.txt. Open Hosts with notepad and check that it doesn't have 127.0.0.1 https//gs.apple.com, Delete the line if it does, if it doesn't just close the file without saving.
- Make sure your user can access the entire file path that leads to Apple Devices. You can do that by adding yourself with folder permissions in the security tab of the folders properties if you get a "you don't have permission to access this folder" warning. Mine was located here "C:\Program Files\WindowsApps\AppleInc.AppleDevices_1.1540.24088.0_x64__nzyj5cx40ttqa\AppleDevices.exe".
- Try to update or restore your device. Make sure you restart Apple devices and the device you are updating.
- If still no cigar, change your DNS to the public google DNS. You can do that in Network settings. Update it manually on IPV4 for both DNS and alternative DNS to Google's public DNS 8.8.8.8 .
- Repeat step 4.
If you can't download the update. You can safely download one from ***Make sure it is the correct firmware for your device and the latest IOS version.
[Edited by Moderator]
