An IPSW file is the full firmware package Apple uses to install or reinstall iOS on a specific device. Downloading the iOS 27 IPSW lets you restore or update an iPhone or iPad from a computer instead of over the air — useful when an update fails, a device will not boot, or you want a clean install.

Before you download: check what Apple is signing

Apple authorises — “signs” — only certain builds at any time, and a restore completes only if the target build is currently signed. Apple normally signs just the newest release and closes the previous one shortly after a new build ships. Check the live signing status before you download, and match your exact device identifier.

Find the right file for your device

IPSW files are hardware-specific. An iPhone 16 Pro file will not restore an iPhone 16, even on the same iOS version. Open the iPhone firmware pages or iPad firmware pages and select your exact model identifier.

How to restore with an iOS 27 IPSW

Back up first — a restore erases the device.

  1. Update Finder, the Apple Devices app, or iTunes to the current version.
  2. Connect the device directly to the computer with a reliable cable.
  3. Hold Option (Mac) or Shift (Windows) and click Restore iPhone.
  4. Select the IPSW file you downloaded.
  5. Let the restore finish without disconnecting.

If the computer does not detect the device, put it into Recovery Mode first.

If the restore fails

Error 3194 usually means the build is not signed or does not match the device — see Error 3194 Fix During IPSW Restore. Errors 4013 and 4014 usually point at the USB path rather than the firmware — see Error 4013 / 4014 Fix When Restoring iPhone.

Supported devices

iOS 27 does not run on every device that ran iOS 26. For the full compatibility list, see iOS 27 Supported Devices.

Frequently Asked Questions

What is an iOS 27 IPSW file?

It is the complete iOS 27 firmware package for one specific Apple device, used to install or reinstall iOS from a computer.

Can I downgrade from iOS 27?

Only while Apple still signs the older build. Signing windows for a previous release usually close within weeks of a new one shipping.

Is an IPSW restore safer than an OTA update?

Both are official Apple paths. An IPSW restore gives a cleaner install and more control over the exact build, but it erases the device.

Why will my IPSW not restore?

The usual causes are an unsigned build, a file for the wrong device, or an unstable USB path. Check signing status and the device identifier first.