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FIRMWARE DETAILS

iOS 17.5

Build: 21F79May 13, 2024Delta OTA
Release CandidateStable

View details

Filename
4e99a9c34eb61fe815c9bff8f57d86f7e4b91b20.zip
File size
4.61 GB
File type
Delta OTA
Download host
updates.cdn-apple.com
Link availability
Not verified

Source reports active

Last link check
Not checked
SHA-256
fd17dd84dba4a68f65c80bd051dff3a4fa285b84287a310e8b728f41861bacfd
SHA-1
8d899db8f26a4fa509ee2c41a326f09f6d2397d2
Required starting builds
19B74
Board restrictions
Not reported

OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.

Compatible hardware (1)

iPhone XS iPhone11,2
Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

AppleDBhttps://api.appledb.dev/ios/iOS%3B21F79.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: fad1f444ed45a9b0b4e75442c2a737cc

AppleDBhttps://api.appledb.dev/ios/iOS%3B21F79-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 2cce62a34025b5a2ae1d1605ae45809f