FIRMWARE DETAILS
macOS 27.0
Build:
26A428Sep 14, 2026Delta OTARelease CandidateStable
View details
- Filename
cd0b3d66b94c6a019efed39012559843aa38a241.zip- File size
- 16.12 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
b6686b32e6efa8e487922ec2256863bd130a3fa3a38a4c49594c8e2936e3b0c6- SHA-1
Not reported- Required starting builds
21G115- 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 (13)
iMac (24-inch, M1, 2021, Four Ports)
UnknowniMac21,1iMac (24-inch, M1, 2021, Two Ports)
UnknowniMac21,2Mac mini (M1, Late 2020)
UnknownMacmini9,1Mac Studio (M1 Max)
UnknownMac13,1Mac Studio (M1 Ultra)
UnknownMac13,2MacBook Air (M1, 2020)
UnknownMacBookAir10,1MacBook Air (M2, 2022)
UnknownMac14,2MacBook Pro (13-inch, M1, 2020)
UnknownMacBookPro17,1MacBook Pro (13-inch, M2, 2022)
UnknownMac14,7MacBook Pro (14-inch, M1 Max, 2021)
UnknownMacBookPro18,4MacBook Pro (14-inch, M1 Pro, 2021)
UnknownMacBookPro18,3MacBook Pro (16-inch, M1 Max, 2021)
UnknownMacBookPro18,2MacBook Pro (16-inch, M1 Pro, 2021)
UnknownMacBookPro18,1Signing 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