macOS 26.4 RC
Build 25E243
Currently Signed
iMac (24-inch, M3, 2023, Two Ports)
Mac15,4
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 less than a minute ago. Apple can stop signing at any time without notice.
Beta Firmware Notice
For official public releases, visit IPSWDL.com
Firmware Details
| Device | iMac (24-inch, M3, 2023, Two Ports) (Mac15,4) |
|---|---|
| OS Type | macOS |
| Version | 26.4 RC |
| Build ID | 25E243 |
| Release Date | March 18, 2026 |
| Signing Status |
Signed
Status last checked March 20, 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.