FIRMWARE DETAILS
macOS 27.0
Build:
26A428Sep 14, 2026Delta OTARelease CandidateStable
View details
- Filename
4e7d1cf1d1848333556c775e69e75ffd66d1385955be93d2c0856c473ddcefff.aea- File size
- 13.96 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
c5eb342e461671b31788cdb96a3cf329689b7754920c37f595aa7a626bbefabc- SHA-1
Not reported- Required starting builds
24D2082- 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 (4)
Mac Studio (M3 Ultra, 2025)
UnknownMac15,14Mac Studio (M4 Max, 2025)
UnknownMac16,9MacBook Air (13-inch, M4, 2025)
UnknownMac16,12MacBook Air (15-inch, M4, 2025)
UnknownMac16,13Signing 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