Skip to content

Browse devices Releases API Data sources

An independent firmware index. Not affiliated with or endorsed by Apple Inc.

Privacy Terms Disclaimer Data sources

Apple Firmware HubClear data. Direct downloads.Apple trademarks ↗

HomeReleasesmacOS 27.0Delta OTA

FIRMWARE DETAILS

macOS 27.0

Build: 26A428Sep 14, 2026Delta OTA

Release CandidateStable

View details

Filename: c62ad2a421636a4eb6415d8edd104bdfc42e47b1.zip
File size: 15.85 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: 626f3b0f2e1a5cba38c00a425ffcd705c806bb0309331798489bd66fb81d23c3
SHA-1: Not reported
Required starting builds: 22G320
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 (8)

MacBook Pro (14-inch, M1 Max, 2021) MacBookPro18,4

Unknown

MacBook Pro (14-inch, M1 Pro, 2021) MacBookPro18,3

Unknown

MacBook Pro (14-inch, M2 Max, 2023) Mac14,5

Unknown

MacBook Pro (14-inch, M2 Pro, 2023) Mac14,9

Unknown

MacBook Pro (16-inch, M1 Max, 2021) MacBookPro18,2

Unknown

MacBook Pro (16-inch, M1 Pro, 2021) MacBookPro18,1

Unknown

MacBook Pro (16-inch, M2 Max, 2023) Mac14,6

Unknown

MacBook Pro (16-inch, M2 Pro, 2023) Mac14,10

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

15.85 GB

Your browser connects directly to Apple’s CDN. This site does not store or proxy firmware files.

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