macOS 26.4 RC
Build 25E243
Currently Signed
MacBook Pro (16-inch, 16-core M3 Max, Nov 2023)
Mac15,9
Released
March 18, 2026
File Size
19.73 GB
Filename
UniversalMac_26.4_25E243_Restore.ipsw
Important Notice About Signing Status
Signing status was last updated 12 hours ago. Apple can stop signing at any time without notice.
Beta Firmware Notice
For official public releases, visit IPSWDL.com
Firmware Details
| Device | MacBook Pro (16-inch, 16-core M3 Max, Nov 2023) (Mac15,9) |
|---|---|
| OS Type | macOS |
| Version | 26.4 RC |
| Build ID | 25E243 |
| Release Date | March 18, 2026 |
| Signing Status |
Signed
Status last checked March 19, 2026.
Verify at IPSW.dev
|
| Filename | UniversalMac_26.4_25E243_Restore.ipsw |
| File Size | 19.73 GB |
| Download URL | https://updates.cdn-apple.com/2026WinterFCS/fullrestores/122-08082/B9E8695D-7851-435A-8897-6D84A80F4F84/UniversalMac_26.4_25E243_Restore.ipsw |
Installation Instructions
How to install this firmware
- Download the IPSW file.
- Connect your device to your computer.
- Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina and later).
- Hold Option (⌥) on Mac or Shift on Windows and click Check for Update or Restore.
- Select the downloaded IPSW file and follow on-screen instructions.