3. Click on the desired firmware version to start the download Downloads Links for iMac (24-inch, 2023) Mac15,4 Mac15,5 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 macOS 14.3.1 (23D60) RELEASE DATE 2024-02-08 SIZE 14.5 GB Signed macOS 14.3 (23D56) RELEASE DATE 2024-01-22 SIZE 14.5 GB Signed macOS 14.2.1 (23C71) RELEASE DATE 2023-12-19 SIZE 14.5 GB Signed macOS 14.2 (23C64) RELEASE DATE 2023-12-11 SIZE 14.5 GB Signed macOS 14.1.2 (23B2091) RELEASE DATE 2023-11-30 SIZE 13.9 GB Signed macOS 14.1.1 (23B2082) RELEASE DATE 2023-11-07 SIZE 13.9 GB Signed macOS 14.1 (23B2077) RELEASE DATE 2023-11-03 SIZE 13.9 GB Signed