MacBook Air (15-inch, M5) IPSW downloads

Model Mac17,4Board J815AP11 versions

Signed now

Apple is signing these versions, so they install with a normal restore.

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11 versions

Newest first, every release Apple has published for this model.

2 builds

macOS 27 firmware for MacBook Air (15-inch, M5)
Version	Build	Released	Size	Status	Download
macOS 27.0.1LatestSigned 26A434 · Sep 28, 2026 · 24.81 GB	26A434	Sep 28, 2026	24.81 GB	Signed	Download
macOS 27.0Signed 26A428 · Sep 14, 2026 · 24.80 GB	26A428	Sep 14, 2026	24.80 GB	Signed	Download

9 builds

macOS 26 firmware for MacBook Air (15-inch, M5)
Version	Build	Released	Size	Status	Download
macOS 26.6.2Signed 25G83 · Aug 17, 2026 · 18.41 GB	25G83	Aug 17, 2026	18.41 GB	Signed	Download
macOS 26.6.1Signed 25G76 · Aug 6, 2026 · 18.41 GB	25G76	Aug 6, 2026	18.41 GB	Signed	Download
macOS 26.6Signed 25G72 · Jul 27, 2026 · 18.41 GB	25G72	Jul 27, 2026	18.41 GB	Signed	Download
macOS 26.5.2Signed 25F84 · Jun 29, 2026 · 18.41 GB	25F84	Jun 29, 2026	18.41 GB	Signed	Download
macOS 26.5.1Signed 25F80 · Jun 1, 2026 · 18.41 GB	25F80	Jun 1, 2026	18.41 GB	Signed	Download
macOS 26.5Signed 25F71 · May 11, 2026 · 18.41 GB	25F71	May 11, 2026	18.41 GB	Signed	Download
macOS 26.4.1Signed 25E253 · Apr 9, 2026 · 18.38 GB	25E253	Apr 9, 2026	18.38 GB	Signed	Download
macOS 26.4Signed 25E246 · Mar 24, 2026 · 18.38 GB	25E246	Mar 24, 2026	18.38 GB	Signed	Download
macOS 26.3.1Signed 25D2128 · Mar 4, 2026 · 18.00 GB	25D2128	Mar 4, 2026	18.00 GB	Signed	Download