Windows

1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
2. Type Get-FileHash iPad2,6_8.2_12D508_Restore.ipsw -Algorithm SHA1
3. The output of the command should match the following checksum: 0d7f97eb6a0d1a5ed9b62a5d6d5e892361ecf1e0. 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 iPad2,6_8.2_12D508_Restore.ipsw
3. The output of the command should match the following checksum: 0d7f97eb6a0d1a5ed9b62a5d6d5e892361ecf1e0. 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 iPad2,6_8.2_12D508_Restore.ipsw
3. The output of the command should match the following checksum: 0d7f97eb6a0d1a5ed9b62a5d6d5e892361ecf1e0. If it doesn't, you may need to redownload the file.

---

Checksums

SHA256sum	b400b7bc2d5bab0d0cbdddfec09b1baab906c63ef56a4d27552c347660572fa6
MD5sum	b246927957b8d105060e170077daee75
SHA1sum	0d7f97eb6a0d1a5ed9b62a5d6d5e892361ecf1e0

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

This release introduces support for Apple Watch, and also includes improvements to the Health app, increased stability and bug fixes.

Apple Watch support

• New Apple Watch app to pair and sync with iPhone, and to customize watch settings
• New Activity app for viewing fitness data and achievements from Apple Watch; appears when Apple Watch is paired
• Available on iPhone 5 and later

Health app improvements

• Adds the ability to select the unit of measurement for distance, body temperature, height, weight and blood glucose
• Improves stability when dealing with large amounts of data
• Includes the ability to add and visualize workout sessions from 3rd-party apps
• Addresses an issue that may have prevented users from adding a photo in Medical ID
• Fixes units for vitamins and minerals
• Fixes an issue where Health data wouldn’t refresh after changing data source order
• Fixes an issue where some graphs showed no data values
• Adds a privacy setting that enables turning off tracking of steps, distance and flights climbed

Stability enhancements

• Increases stability of Mail
• Improves stability of Flyover in Maps
• Improves stability of Music
• Improves VoiceOver reliability
• Improves connectivity with Made for iPhone Hearing Aids

Bug fixes

• Fixes an issue in Maps that prevented navigating to some favorite locations
• Addresses an issue where the last word in a quick reply message wasn't autocorrected
• Fixes an issue where duplicate iTunes purchased content could prevent iCloud restore from completing
• Resolves an issue where some music or playlists didn’t sync from iTunes to the Music app
• Fixes an issue where deleted audiobooks sometimes remained on device
• Resolves an issue that could prevent call audio from routing to car speakers while using Siri Eyes Free
• Fixes a Bluetooth calling issue where no audio is heard until the call is answered
• Fixes a timezone issue where Calendar events appear in GMT
• Addresses an issue that caused certain events in a custom recurring meeting to drop from an Exchange calendar
• Fixes a certificate error that prevented configuring an Exchange account behind a third-party gateway
• Fixes an issue that could cause an organizer’s Exchange meeting notes to be overwritten
• Resolves an issue that prevented some Calendar events from automatically showing as 'Busy' after accepting an invite

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222