3. Click on the desired firmware version to start the download Downloads Links for MacBook Air (13-inch, M3, 2024) Mac15,12 VERSION RELEASE DATE RELEASE DATE SIZE SIZE STATUS macOS 14.5 (23F79) RELEASE DATE 2024-05-13 SIZE 14.8 GB Signed macOS 14.4.1 (23E224) RELEASE DATE 2024-03-25 SIZE 14.7 GB Signed macOS 14.4 (23E214) RELEASE DATE 2024-03-07 SIZE 14.7 GB Signed