Windows

1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
2. Type Get-FileHash iPhone_4.0_64bit_15.1_19B74_Restore.ipsw -Algorithm SHA1
3. The output of the command should match the following checksum: d542d3bb7a6e9b519bf9351d5429f9abf2a598b9. If it doesn't, you may need to redownload the file.

macOS

1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
2. Type openssl sha1 iPhone_4.0_64bit_15.1_19B74_Restore.ipsw
3. The output of the command should match the following checksum: d542d3bb7a6e9b519bf9351d5429f9abf2a598b9. If it doesn't, you may need to redownload the file.

Linux

1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
2. Type openssl sha1 iPhone_4.0_64bit_15.1_19B74_Restore.ipsw
3. The output of the command should match the following checksum: d542d3bb7a6e9b519bf9351d5429f9abf2a598b9. If it doesn't, you may need to redownload the file.

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Checksums

SHA256sum	5559ac78b277751938c63467f97d0f031693817a23653608ddbf73f080a58c6e
MD5sum	29b9a0cbebb0c2c57f803a5ad7265050
SHA1sum	d542d3bb7a6e9b519bf9351d5429f9abf2a598b9

Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

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