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HomeReleasesmacOS 27.0Delta OTA

FIRMWARE DETAILS

macOS 27.0

Build: 26A428Sep 14, 2026Delta OTA

Release CandidateStable

View details

Filename: 74e575759d0a41b07840b6f3ebc1d4b0ff8d2bfac69426cde039841b7f6f7709.aea
File size: 14.90 GB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: 453a70797f27431a9ca9408e44b4c948d80eaf7ec74d740b80ff033e6e16df7f
SHA-1: Not reported
Required starting builds: 23B2073
Board restrictions: Not reported

OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.

Compatible hardware (9)

iMac (24-inch, M3, 2023, Four Ports) Mac15,5

Unknown

iMac (24-inch, M3, 2023, Two Ports) Mac15,4

Unknown

MacBook Pro (14-inch, 14-core M3 Max, Nov 2023) Mac15,10

Unknown

MacBook Pro (14-inch, 16-core M3 Max, Nov 2023) Mac15,8

Unknown

MacBook Pro (14-inch, M3 Pro, Nov 2023) Mac15,6

Unknown

MacBook Pro (14-inch, M3, Nov 2023) Mac15,3

Unknown

MacBook Pro (16-inch, 14-core M3 Max, Nov 2023) Mac15,11

Unknown

MacBook Pro (16-inch, 16-core M3 Max, Nov 2023) Mac15,9

Unknown

MacBook Pro (16-inch, M3 Pro, Nov 2023) Mac15,7

Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

AppleDBhttps://api.appledb.dev/ios/macOS%3B26A428-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 12:56 PM UTC
Record fingerprint: 8305c639c5a60addec74ac2aabc81374

14.90 GB

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Download from Apple

File typeDelta OTA

Link availabilityNot verified

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

How downloads work