iPadOS 9.0 (build 13A4293g) is an official Apple over-the-air update for the iPad 4 (WiFi), released on 2015-07-08T18:38:04Z. The update package is 281.12 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0b1d3b47a24a6e06a16ee32824888fb4778c657b.zip.