Some users said that they were unable to restore their iPhone 18 Pro or iPhone 18 Pro Max due to an unknown 4045 error message. You may have to restore your iPhone for various reasons. For example, if your iPhone is locked due to mistyping your passcode too many times, you may have to restore your iPhone to gain access again. This process involves erasing the iPhone and then restoring it from a backup using a computer. Users have reported that they are unable to complete the restore process and keep getting this strange error message saying:
The iPhone “iPhone Name” could not be restored. An unknown error occurred (4045).
Update iTunes on PC or update your Mac
As I stated above, this step requires a PC or Mac. If this is a PC, make sure that you have the latest version of the Apple Devices app or iTunes. If this is a Mac, ensure you have the latest version of macOS. On your Mac, you can check for updates by going to System Settings > General > Software Update. If there are updates, follow the onscreen instructions to update your Mac. After ensuring that you have updated the essential software, try to restore your iPhone again.
Error #4045
Apple documentation includes a lot of error messages and possible troubleshooting steps; however, there is no 4045 error documentation. Apple lists errors 4005, 4013, and 4014 under its USB connection checks. There are two types of connections when you connect your iPhone to your computer. The first one is the connection from the computer to Apple Servers. If for some reason there are connection issues reaching the Apple Server, the restore will fail. The following steps will address this:
- Go to the Apple System Status page to see if any of the Apple Services are down.
- It is possible that your firewall or antivirus software is preventing the proper connection. Do you have any type of antivirus, firewall, or cleaning app? If so, disable it and then try again. You might need to update, change, or uninstall software that could be interfering with your computer’s connection with the Apple Devices app or iTunes.
- Check that your computer can connect to Apple’s software update servers.
Check your cables
As I said above, there are two connections. One is between the computer and the Apple servers, and the other is between your iPhone 18 Pro and your computer. This is a wired USB connection. Try the following:
- There may be a problem with your computer. Try to use a different computer if possible. Update or restore your device on another computer that uses a different network.
- There may be a problem with your computer’s USB port. Try to use a different port on your computer. Don’t use the USB port on your keyboard.
- Ensure that your USB cables are working and Apple certified. If possible, try to use another cable.
- Make sure that your device is unlocked. If prompted, trust your device.
- Turn off your computer, then turn it on again. Next, restart your device.
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