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HomeReleasesmacOS 27.0Delta OTA

FIRMWARE DETAILS

macOS 27.0

Build: 26A428Sep 14, 2026Delta OTA

Release CandidateStable

View details

Filename: 021facf73577b76400a44d0ed1b5a4d293c0f769.zip
File size: 14.00 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: c55831df64d2294be8d974d811373fcb3c2e581eb89469de87034d16b3c61b6b
SHA-1: Not reported
Required starting builds: 24B2082
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, M4, 2024, Four Ports) Mac16,3

Unknown

iMac (24-inch, M4, 2024, Two Ports) Mac16,2

Unknown

Mac mini (M4 Pro, 2024) Mac16,11

Unknown

Mac mini (M4, 2024) Mac16,10

Unknown

MacBook Pro (14-inch, M4 Max, Nov 2024) Mac16,6

Unknown

MacBook Pro (14-inch, M4 Pro, Nov 2024) Mac16,8

Unknown

MacBook Pro (14-inch, M4, Nov 2024) Mac16,1

Unknown

MacBook Pro (16-inch, M4 Max, Nov 2024) Mac16,5

Unknown

MacBook Pro (16-inch, M4 Pro, Nov 2024) Mac16,7

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

14.00 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