Apple iMac 24-inch (M1, Two Ports, 2021) macOS 15.6 firmware
Apple iMac 24-inch (M1, Two Ports, 2021)
Signed
macOS 15.6
Build 24G84 For iMac21,1, J456AP
Global · IPSW
A newer version is available for this region: macOS 27.0.1
Download
15.7 GB
Downloads from updates.cdn-apple.com.
File details
- OS
- macOS 15.6
- Region
- Global
- Type
- IPSW
- Install with
- How to restore a Mac with Apple silicon (IPSW)
- Released
- Size
- 15.7 GB
- File name
UniversalMac_15.6_24G84_Restore.ipsw- MD5
2ebb056bd4315b93785f3d8b17ec18a0- SHA-1
7dd9ab8dba1e088c297934f7d14a0df144f7ec91- SHA-256
8fbeaca047b66bcbc8ea557f2b3f95bcb84cd0f60cbfdadb52fc23ecfe671317
After downloading, compare the checksum with the one above. If they differ, the file is incomplete — download it again.
Before you download
- Make sure your device’s model number is one of: iMac21,1, J456AP. You will find it in Settings → About phone, or on the box.
- This file is for the Global region. Installing another region’s firmware can remove features or block updates.
- Apple devices can only restore versions marked “Signed”.
- Back up your photos, contacts and files first, and charge the battery above 50%.
How to install
Macs with Apple silicon (M1 and newer) and Intel Macs with a T2 chip can be restored from an IPSW using a second Mac and Apple Configurator. This reinstalls the firmware and macOS and erases the Mac.
Read the guide: How to restore a Mac with Apple silicon (IPSW)