FIRMWARE DETAILS
macOS 27.0 beta 7
Build:
26A5421aAug 24, 2026macOS InstallerBeta
View details
- Filename
InstallAssistant.pkg- File size
- 16.99 GB
- File type
- macOS Installer
- Download host
swcdn.apple.com- Link availability
- Not verified
Source reports this link inactive
- Last link check
- Not checked
- SHA-256
Not reported- SHA-1
3e2bff39e1f4f3278b9d424a3031c0c3cda818c4- Required starting builds
Not reported- Board restrictions
Not reported
Compatible hardware (56)
iMac (24-inch, M1, 2021, Four Ports)
Not applicableiMac21,1iMac (24-inch, M1, 2021, Two Ports)
Not applicableiMac21,2Not applicable
Not applicable
Not applicable
Not applicable
Mac mini (M1, Late 2020)
Not applicableMacmini9,1Mac mini (M2 Pro, 2023)
Not applicableMac14,12Mac mini (M2, 2023)
Not applicableMac14,3Mac mini (M4 Pro, 2024)
Not applicableMac16,11Mac mini (M4, 2024)
Not applicableMac16,10Mac Pro (2023)
Not applicableMac14,8Mac Pro (Rack, 2023)
Not applicableMac14,8Mac Studio (M1 Max)
Not applicableMac13,1Mac Studio (M1 Ultra)
Not applicableMac13,2Mac Studio (M2 Max, 2023)
Not applicableMac14,13Mac Studio (M2 Ultra, 2023)
Not applicableMac14,14Mac Studio (M3 Ultra, 2025)
Not applicableMac15,14Mac Studio (M4 Max, 2025)
Not applicableMac16,9MacBook Air (13-inch, M3, 2024)
Not applicableMac15,12MacBook Air (13-inch, M4, 2025)
Not applicableMac16,12MacBook Air (13-inch, M5)
Not applicableMac17,3MacBook Air (15-inch, M2, 2023)
Not applicableMac14,15MacBook Air (15-inch, M3, 2024)
Not applicableMac15,13MacBook Air (15-inch, M4, 2025)
Not applicableMac16,13MacBook Air (15-inch, M5)
Not applicableMac17,4MacBook Air (M1, 2020)
Not applicableMacBookAir10,1MacBook Air (M2, 2022)
Not applicableMac14,2MacBook Neo
Not applicableMac17,5MacBook Pro (13-inch, M1, 2020)
Not applicableMacBookPro17,1MacBook Pro (13-inch, M2, 2022)
Not applicableMac14,7Not applicable
Not applicable
MacBook Pro (14-inch, M1 Max, 2021)
Not applicableMacBookPro18,4MacBook Pro (14-inch, M1 Pro, 2021)
Not applicableMacBookPro18,3Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
MacBook Pro (14-inch, M5 Max)
Not applicableMac17,7MacBook Pro (14-inch, M5 Pro)
Not applicableMac17,9Not applicable
Not applicable
MacBook Pro (16-inch, M1 Max, 2021)
Not applicableMacBookPro18,2MacBook Pro (16-inch, M1 Pro, 2021)
Not applicableMacBookPro18,1Not applicable
MacBook Pro (16-inch, M2 Pro, 2023)
Not applicableMac14,10Not applicable
Not applicable
Not applicable
MacBook Pro (16-inch, M5 Max)
Not applicableMac17,6MacBook Pro (16-inch, M5 Pro)
Not applicableMac17,8MacBook Pro 14-inch (M5)
Not applicableMac17,2Signing 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%3B26A5421a.json ↗
MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 10:56 PM UTC
Record fingerprint: aec1e8c402217b39b651b757d946cf06