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HomeReleasesmacOS 27.0.1Delta OTA

FIRMWARE DETAILS

macOS 27.0.1

Build: 26A434Sep 28, 2026Delta OTA

Stable

View details

Filename: 66c164cc5bf7e1c88c1ab53c9653fdff222868e98f64c141d72dae1f757b91da.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: bfa1e5499708a39735ed2ba76689a8e763c9ec963df3e2ab58a26db8c1c38392
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%3B26A434.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 10:56 PM UTC
Record fingerprint: 5d74a3439f2c9981faa635c8bbd9b8e8

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