3. Click on the desired firmware version to start the download Downloads Links for Developer Transition Kit ADP3,2 VERSION RELEASE DATE RELEASE DATE SIZE SIZE STATUS macOS 11.2.3 (20D91) RELEASE DATE 08-03-2021 SIZE 13.7 GB Signed macOS 11.2.2 (20D80) RELEASE DATE 25-02-2021 SIZE 13.7 GB Signed macOS 11.2.1 (20D74) RELEASE DATE 09-02-2021 SIZE 13.7 GB Signed macOS 11.2 (20D64) RELEASE DATE 01-02-2021 SIZE 13.7 GB Signed macOS 11.1 (20C69) RELEASE DATE 14-12-2020 SIZE 13.9 GB Signed macOS 11.0.1 (20B29) RELEASE DATE 18-11-2020 SIZE 13.6 GB Signed