Mac· IPSW RESTORE

Developer Transition Kit

ADP3,2

Catalog data · Last updated: Oct 21, 2026, 6:25 PM UTC

Choose an IPSW version for Developer Transition Kit (ADP3,2) and check its signing status before downloading.

This is Mac restore firmware, not a regular macOS installer. The restore steps depend on the model.

Firmware list

Device / VersionSigning statusSizeRelease date

Developer Transition Kit

macOS 11.2.3 20D91

Signed

12.77 GB3/8/2021

Developer Transition Kit

macOS 11.2.2 20D80

Signed

12.76 GB2/25/2021

Developer Transition Kit

macOS 11.2.1 20D74

Signed

12.76 GB2/9/2021

Developer Transition Kit

macOS 11.2 20D64

Signed

12.76 GB2/1/2021

Developer Transition Kit

macOS 11.1 20C69

Signed

12.95 GB12/14/2020

Developer Transition Kit

macOS 11.0.1 20B29

Signed

12.68 GB11/18/2020