Direct signed and unsigned iPadOS IPSW firmware download links, restore files, release metadata, downgrade status and build information for iPad Pro 10.5-inch running iPadOS 11.2.1.
Build Number: 15C153
Release Date: 2017-12-13T18:04:09Z
Download IPSW FileiPadOS 11.2.1 build 15C153 is a firmware package available for the iPad Pro 10.5-inch and is currently unsigned by Apple at the time of indexing. This IPSW restore file can be used for firmware verification, software restoration reference, signing status tracking and historical iPadOS build research.
Each IPSW package published for iPad Pro 10.5-inch contains Apple’s full operating system restore image, allowing users and researchers to identify signing windows, firmware branch transitions, build migrations and public software release chronology.
Black Apple World tracks signed and unsigned firmware states, build numbers, release metadata and direct IPSW file locations across all major iPad generations in one continuously updated firmware database.
The current signing state for this firmware is marked as CURRENTLY UNSIGNED. Signed firmware means Apple servers may still authorize restore validation for this build, while unsigned firmware generally indicates the signing window has closed after newer iPadOS releases became primary deployment targets.
Users commonly search for direct IPSW downloads to verify firmware authenticity, study historical iPadOS release progression, reference signed firmware availability, compare build transitions and maintain an archive of official Apple restore files.
No. Apple is no longer signing this firmware build.
The build number for this firmware release is 15C153.
Yes. A direct Apple-hosted IPSW firmware link is available on this page.