What is an IPSW file?

An IPSW (iOS Software) file is a firmware file used by Apple devices. It contains the operating system and other software components needed to restore or update iOS devices like iPhones, iPads, and iPod touches.

How do I download an unsigned IPSW?

You can download unsigned IPSW files from IPSWFile.com. IPSW File is the #1 trusted websites that archive these files. All the files shared on IPSWFile.com is are from Apple server, so it is 100% safe and secure to download and use files downloaded from IPSWFile.com

How do I install an IPSW file on an iPhone?

To install an IPSW file on an iPhone: 1. Connect your iPhone to a computer with iTunes or Finder (macOS Catalina and later). 2. Open iTunes or Finder and select your device. 3. Hold the Shift key (Windows) or Option key (Mac) and click on 'Check for Update' or 'Restore iPhone.' 4. Select the IPSW file you want to install. 5. Follow the on-screen instructions to complete the process.

How to install unsigned ipsw?

Installing an unsigned IPSW file is generally not possible on modern iOS devices due to Apple's security measures. Unsigned IPSW files are typically older versions of iOS that Apple no longer signs (authorizes for installation).

How to restore unsigned ipsw without SHSH blobs

Unfortunately, it's not possible to restore an unsigned IPSW without SHSH blobs on modern iOS devices. SHSH blobs are unique signatures required for downgrading or restoring to a specific iOS version, and they need to be saved while Apple is still signing that version.

How can I use an IPSW file to restore my device?

You can use iTunes or 3uTools to restore your device using an IPSW file. Simply download the correct IPSW file for your device, connect your device to your computer, and use iTunes or 3uTools to select and restore the firmware.

Download iOS 15.1 (19B74) for iPhone 12 Pro Max

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier	iPhone13,4
iOS Version	15.1
Release Date	2021-10-25
Update Date	2021-10-15
Sha1sum	29f0436d777732c2d91fed60c8ac972674520dd7
Sha256sum	4be85b0647734c3dbf7d4eba63a4726aac6cfd4075526b1a3ae871b0d06cff02
md5sum	8d4f41e2e152d54b62a6123985ee4616
Size	6.17 GB
FileName	iPhone13,4_15.1_19B74_Restore.ipsw
Status

Release Notes

It should be noted that these are the official release notes for the from Apple

SharePlay

SharePlay is a new way to share synchronized experiences in FaceTime with content from the Apple TV app, Apple Music, Fitness+, and other supported App Store apps
Shared controls give everyone the ability to pause, play, rewind or fast forward
Smart volume automatically lowers the audio of a movie, TV show or song when your friends speak
Apple TV supports the option to watch the shared video on your big screen while you continue the FaceTime call on iPhone
Screen sharing lets everyone on a FaceTime call look at photos, browse the web, or help each other out

Camera

ProRes video capture using iPhone 13 Pro and iPhone 13 Pro Max
Setting to turn off automatic camera switching when taking macro photos and videos on iPhone 13 Pro and iPhone 13 Pro Max

Apple Wallet

COVID-19 vaccination card support allows you to add and present verifiable vaccination information from Apple Wallet

Translate

Mandarin Chinese (Taiwan) support in the Translate app and for system-wide translation

Home

New automation triggers based on the current reading of a HomeKit-enabled humidity, air quality, or light level sensor

Shortcuts

New pre-built actions let you overlay text on images or gifs, plus a new collection of games lets you pass the time with Siri

This release also fixes the following issues:

Photos app may incorrectly report storage is full when importing photos and videos
Weather app may not show current temperature for My Location, and may display colors of animated backgrounds incorrectly
Audio playing from an app may pause when locking the screen
Wallet may unexpectedly quit when using VoiceOver with multiple passes
Available Wi-Fi networks may not be detected
Battery algorithms updated on iPhone 12 models to better estimate battery capacity over time

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222

IPSW File Download FAQ