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FIRMWARE DETAILS

iOS 17.5

Build: 21F79May 13, 2024Delta OTA
Release CandidateStable

View details

Filename
c4d2359a7b0b9503908b8d8e39a4144fa2e13768.zip
File size
3.52 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
dc431ad80b52098efe4e758401cb2ec4f6c37720dec4c0da89e73f1c95715d5d
SHA-1
e638451dbcf1a3821c82708d2d228a4a2c20dee3
Required starting builds
20G75, 20G81
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 Max iPhone11,6
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