iPadOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2018-09-12T19:06:09Z. The update package is 1.26 GB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cdf0ad1fe2b8f531a664373511b969b8167cf6be.zip.