3uTools is Windows-only and requires running drivers that may conflict with iTunes. Use a dedicated PC or virtual machine.

ReiBoot or 3uTools. Why: They offer "Exit Recovery Mode" and "Standard Repair" that can fix corrupted system partitions without a full erase.

In the ecosystem of Apple devices, the operating system (iOS, iPadOS, or tvOS) is typically a walled garden. Users are usually funneled through the "Software Update" mechanism in Settings, which downloads and installs the latest version approved by Apple. But what happens when you need to go back to an older version? What if your device is stuck in a boot loop? Or perhaps you are a developer needing to test a specific beta version?

The manual installation process is similar across most desktop tools.

But what exactly is an IPSW? And, more importantly, which tool should you use to install it without bricking your device?

: A third-party alternative often used when official tools fail. It specializes in fixing devices stuck in boot loops or recovery mode while installing firmware.