macOS 11.2.1 (20D74) for Developer Transition Kit
Signed — can be installed
Released Feb 9, 2021
ADP3,2
Download IPSW
UniversalMac_11.2.1_20D74_Restore.ipsw
The file is downloaded directly from Apple’s servers (updates.cdn-apple.com). Large files download faster with a download manager or curl -O.
Verify the file
- SHA256
- 6d16fe550707f8644abf1178d581efc6cba59ef0ff8fa9180d8736370bc99680
- SHA1
- e86a28704fc5e46feeaa118660bb8dece33a936d
- MD5
- 2f0f899d9eb35e84faac2134c3e0754f
On a Mac: shasum -a 256 UniversalMac_11.2.1_20D74_Restore.ipsw · On Windows: certutil -hashfile UniversalMac_11.2.1_20D74_Restore.ipsw SHA256
Firmware details
- Version
- macOS 11.2.1
- Build
20D74- Released
- February 9, 2021
- Uploaded
- February 6, 2021
- File size
- 12.76 GB (13,698,563,701 bytes)
- Signing
- Signed
Device
- Identifier
ADP3,2- Board
J273aAP- Platform
t8027- CPID
0x8027- BDID
0x42
How to install macOS 11.2.1 with this IPSW
- Back up your Developer Transition Kit to iCloud or your computer — restoring erases the device.
- Turn off Find My in Settings → [your name] → Find My.
- Connect the device with a cable and open Finder (macOS Catalina or later) or Apple Devices / iTunes (Windows).
- Hold Option (Mac) or Shift (Windows) and click Restore. Choose
UniversalMac_11.2.1_20D74_Restore.ipsw. - Wait — the device restarts several times. Don’t disconnect it until you see the Hello screen.
Stuck on the Apple logo? Put the device into recovery mode first, then restore.