About This Firmware
iPadOS 4.2.1
(build 8C148) is an official Apple IPSW
for the iPad 1.
The download is 551.30 MB and is served directly from Apple's CDN.
This firmware is no longer signed by Apple. Standard downgrades are not possible, but the file remains available for reference and advanced use.
Verify the download using the checksums below.
Filename
iPad1,1_4.2.1_8C148_Restore.ipsw
Checksums
SHA-256
8417eeccd664a089a6b4a3b91cb7ec88753cc6f320a192bf38fb8c6ffe29665b
SHA-1
8717b3bedc925b587566442ad375aa65d857e79a
MD5
9402d5f05348fd68c87f885ff4cb4717
Direct URL
https://secure-appldnld.apple.com/iPad/061-9857.20101122.VGthy/iPad1,1_4.2.1_8C148_Restore.ipsw
Other Devices
iPad Pro 4 (11-inch, WiFi)
iPad8,9
iPad Pro 3 (11-inch, Cellular, 1TB Model)
iPad8,4
iPad Pro (11-inch, Cellular) (3rd generation)
iPad13,5
iPad Pro 3 (11-inch, Cellular)
iPad8,3
iPad mini (Global)
iPad2,7
iPad 8 (Cellular)
iPad11,7
How to Restore with This IPSW
iTunes / Finder
macOS & Windows- Download the .ipsw file to your computer.
- Connect your iPad 1 via USB.
- Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina+) and select your device.
- Update (keep data): hold Option (Mac) or Shift (Windows) and click Update, then pick the .ipsw file.
- Restore (erase & install): hold Option / Shift and click Restore iPhone…, then pick the .ipsw file.
- Wait for the process to finish - do not disconnect.
Restoring will erase all data on the device. Back up first.
3uTools
Windows- Download and install 3uTools from 3u.com.
- Connect your iPad 1 via USB and trust the computer on the device.
- Go to Flash & JB > Easy Flash.
- Click Import and select the downloaded .ipsw file.
- Choose Flash mode: Update keeps data, Restore wipes the device.
- Click Flash and wait for the progress bar to complete - do not disconnect.
Only flash firmware that matches your exact device model.
DFU Mode
Recovery tipIf your device is stuck in a boot loop or iTunes/Finder does not recognise it, enter DFU mode first, then select the .ipsw file as normal.
iPhone 8 / X and later
- Quickly press & release Volume Up
- Quickly press & release Volume Down
- Hold Side button until screen goes black
- Hold Side + Volume Down for 5 s
- Release Side, hold Volume Down 5 more s
- Black screen = DFU active
iPhone 7 / 7 Plus
- Hold Sleep/Wake + Volume Down for 8 s
- Release Sleep/Wake, keep holding Volume Down for 5 s
- Black screen = DFU active
iPhone 6s and earlier
- Hold Sleep/Wake + Home for 8 s
- Release Sleep/Wake, keep holding Home for 5 s
- Black screen = DFU active