Many users face a situation where they need to update the software on their device. Apple, but wireless network access is limited or unavailable. This could be due to low home internet speed, a data limit on the router, or simply the lack of a stable access point. In such cases, the question arises whether the procedure can be completed using only a wired connection and a personal computer.
Luckily, the company Apple provided an alternative method for downloading and installing updates that doesn't require a direct connection to a Wi-Fi network. The main tool here is a program iTunes (or Finder (on newer versions of macOS), which acts as an intermediary between the update server and your device. This method is considered more reliable, as it eliminates the risk of download interruptions due to an unstable wireless signal.
It's important to understand that while the smartphone or tablet itself doesn't use Wi-Fi, the computer it's connected to must have an active internet connection. It's the PC that will download the necessary data packet, weighing several gigabytes, and then transmit it to iPhone or iPad via USB cable. Updating via iTunes is the only official way to install iOS 12 without using a wireless network on the device itself.
Preparation of equipment and software
Before starting the procedure, you need to make sure that all components of your system are ready for operation. Connection stability — is a key factor for success, so it's worth checking the integrity of the USB cable. Using damaged or uncertified cables can lead to data transfer errors at the most inopportune moment, once the process has already begun.
You will need a computer running an operating system Windows or macOSThe PC must have the latest version of the program installed. iTunes, available for download from the official website Apple or through the app store Microsoft StoreOutdated software versions may not correctly detect new (or old, in the case of iOS 12) firmware versions and may not offer them for installation.
⚠️ Important: Make sure you have at least 10 GB of free space on your computer's hard drive. Temporary update files and the operating system copy itself take up significant space, and running out of space may interrupt the download.
It is also critical to check the battery charge of your mobile device. Battery The device should be charged to at least 50%, although it's recommended to keep it connected to a power source throughout the entire process. If the battery drops below a critical level while writing data, the device may enter a reboot loop or require a DFU restore.
☑️ Check before updating
Back up your data before flashing
Any manipulation of system software carries a theoretical risk of data loss. Even if you plan to simply update the system and keep all files, creating a backup is a mandatory step in professional preparation. This will allow you to recover information in case of unexpected failures such as a power outage or file system error.
You can create a backup copy directly in the interface iTunesConnect your device to your computer, select it from the list of devices, and click "Copy Now" in the "Browse" section. We recommend selecting "This PC" to save the copy locally, which significantly speeds up the process compared to cloud storage. iCloud.
- 📱 Open iTunes and select your gadget from the top menu.
- 💾 In the "Backups" section, select "This PC".
- 🔒 If necessary, set an encryption password to save passwords and Health data.
- ▶️ Click "Copy Now" and wait for the process to complete.
Once the backup is complete, the system will notify you that the restore point has been successfully created. Now, even if something goes wrong during boot, iOS 12, you can restore all settings and apps to their original state. This is especially true for older models, such as iPhone 5s or iPad Air, which may be more sensitive to changes in the file system structure.
Finding and downloading the IPSW firmware file
To update without Wi-Fi on the device itself, you often need to manually download the firmware file IPSWThis is the complete operating system image that iTunes will use for installation. Automatic downloads through the program can sometimes fail or require a stable connection, which isn't always available, so the manual method is preferable.
Firmware files can be found on specialized resources such as ipsw.me. You need to select your device model from the list. Be careful: the firmware for iPhone 6 not suitable for iPhone 6 Plus, despite the similarity of the names. Each model has a unique identifier, and using the wrong file will result in a compatibility error.
After selecting your model, you'll see a list of available iOS versions. Find it in the list. iOS 12 (The latest available version, for example, 12.5.7). Download the file corresponding to your model. The file size is typically around 2-3 GB, so the download may take some time depending on the speed of your PC's wired internet connection.
| Device model | The latest version of iOS 12 | File size (approximately) | Year of release |
|---|---|---|---|
| iPhone 5s | 12.5.7 | 1.8 GB | 2013 |
| iPhone 6 | 12.5.7 | 2.1 GB | 2014 |
| iPhone 7 | 15.8 (but supports iOS 12) | 2.5 GB | 2016 |
| iPad Air 1 | 12.5.7 | 2.0 GB | 2013 |
Save the downloaded file to an easily accessible folder, such as your Desktop, to avoid having to search for it when connecting. Make sure the file name doesn't contain any extra characters and ends with .ipswIn some browsers, the extension may be hidden, so check the file properties via the context menu.
Why can't I use firmware from another model?
Each Apple device has a unique set of drivers and hardware components. Attempting to install iPhone 6 software on an iPhone 7 will result in a hardware conflict and may cause irreversible bootloader errors (bootloop).
Manual update via iTunes
Once the firmware file is downloaded and the device is connected, you can proceed to the installation itself. Run iTunes and wait until the program recognizes your iPhone or iPadIn the main device management window, you'll see the current software version and an "Update" button. However, clicking this button automatically will initiate an automatic search, which is not what we need.
To use a pre-downloaded file, you must use a keyboard shortcut. On computers with OS Windows hold down the key Shift and, without releasing it, left-click on the "Refresh" button. If you are working on Mac, then the Shift key is used instead of Option (Alt) A file selection dialog box will open.
In the window that opens, find the previously downloaded file with the extension .ipsw, select it, and click "Open." iTunes will check the file's integrity and compatibility with the connected device. If all parameters are correct, the update preparation process will begin.
⚠️ Important: Do not disconnect the USB cable while Apple is verifying the signature. Interrupting this step may cause your device to become stuck on the Apple logo and require you to enter recovery mode.
After verification, the installation itself will begin. The device's screen will turn off and a progress bar will appear. At this point iTunes Copies system files to the device's flash memory. The process can take 10 to 30 minutes depending on the USB port speed and device model.
Using Recovery Mode
In some cases, a standard update may not run, especially if the device already has a newer version of iOS or the system is damaged. In this case, you will need to put the device into recovery modeThis state allows for a forced reinstallation or update of the system, bypassing the standard checks of the running OS.
To enter this mode, different button combinations are used on different devices. iPhone 6s and older models, you need to hold down the Home button while the cable is connected. iPhone 7 Press and hold the volume down button. On newer models supporting iOS 12, use a quick press of the volume up button, then down button, and then a long press of the side button.
When the cable icon and iTunes logo appear on the screen, your computer will recognize your device as requiring a restore. iTunes will prompt you to "Restore" or "Update." Select "Update" to attempt to reinstall iOS without losing your data. The program will automatically download the latest firmware unless you manually select the file using the Shift key.
- 🔄 Connect the device to the PC while it is turned off.
- 👆 Press the desired combination of buttons for your model.
- 🖥️ Wait for the recovery mode logo to appear on the screen.
- ✅ In iTunes, select the "Update" action.
This method is more aggressive and often helps fix software errors that interfere with a normal installation. However, it takes longer, as the system goes through additional component checks. Make sure the computer doesn't go into sleep mode during the process.
Common mistakes and how to solve them
Even if you follow all the instructions, technical difficulties may arise. One of the most common mistakes is Error 3194This means iTunes can't contact Apple's activation server to verify the firmware's digital signature. This often happens if the firmware file has been modified or if Apple's servers are temporarily unavailable.
Another common problem is Error 9 or Error 4013These codes typically indicate hardware issues: a faulty USB cable, a bad port on the computer, or a damaged Lightning/30-pin connector on the device itself. In such cases, it's recommended to try a different cable and connect the device directly to the PC's motherboard (at the back of the system unit), bypassing USB hubs.
If the process freezes at the "Extracting Software" stage or the progress bar doesn't move for more than an hour, your antivirus or firewall software may be blocking iTunes' connection to Apple servers. Try temporarily disabling your security software and repeating the process. It's also worth checking if a file is blocking it. hosts in the domain system apple.com.
⚠️ Note: Program interfaces and error codes may change with the release of new iTunes versions. If the methods described above don't help, check the official list of error codes on the Apple support website.
In rare cases, the problem lies in the lack of access rights in the computer's operating system. Launch iTunes Running the program as an administrator can solve the problem with temporary files. To do this, right-click the program shortcut and select the appropriate menu item.
Questions and Answers (FAQ)
Is it possible to update to iOS 12 if my device is running iOS 14?
No, Apple doesn't allow you to downgrade to older versions of iOS. After Apple stopped signing iOS 12 (which happened a long time ago), it's officially impossible to install it either over Wi-Fi or through iTunes. You can only install the version Apple continues to sign.
How long does it take to download and install iOS 12?
The time depends on your computer's internet speed and the device model. Downloading the file (2-3 GB) on a fast connection will take 5-10 minutes. Installation on the device typically takes 15 to 30 minutes. The entire process rarely exceeds 45 minutes.
Do I need my Apple ID password to update?
The update process itself doesn't require a password. However, if Find My iPhone (Activation Lock) is enabled on your device, you'll need to enter your Apple ID password after the installation is complete and the device restarts to activate.
What should I do if iTunes doesn't see my device?
Try replacing the USB cable with a genuine or certified (MFi) one. Check if the Apple Mobile Device Support drivers are installed (on Windows). Also, try connecting to a different USB port or a different computer.
Will my photos and contacts be deleted when I update?
Selecting "Update" preserves your data. However, if you select "Restore" or a critical error occurs, your data may be lost. Therefore, creating a backup before starting the procedure is essential.