Yes, IPSW files are safe to use as long as they are downloaded from trusted sources like iosfixkit.com.

What is an IPSW file?

An IPSW file is a firmware update file used by Apple devices, including iPhones, iPads, and iPods, for restoring or updating their operating system.

How do I install an IPSW file?

You can install an IPSW file using iTunes or Finder (on macOS Catalina and later). Download the correct IPSW file, connect your device, and use the 'Restore' option while holding Shift (Windows) or Option (Mac) to select the IPSW file.

Can I downgrade my iPhone using IPSW?

You can downgrade your iPhone using an IPSW file only if Apple is still signing the previous iOS version. Unsigned IPSWs cannot be restored via iTunes.

How do I check if an IPSW file is signed?

You can check the signing status of an IPSW file using iosfixkit.com, where we provide real-time updates on which versions are currently signed by Apple.

Can I use IPSW to jailbreak my device?

Some jailbreak tools require specific IPSW files, but installing an IPSW alone does not jailbreak a device. You need additional tools such as checkra1n or unc0ver.

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Official Apple Firmware

Download iOS Firmware for MacBook Air (15-inch, M5)

Signed and unsigned IPSW files for Mac17,4. Direct downloads from Apple's CDN servers.

Product

Platform

Version

Download

IPSW Firmware
Specs

Signed IPSWs

Restore Possible

iOS 26.3.1

25D2128

Mar 4, 2026

Release Date

18.00 GB

Size

Unsigned IPSWs

Cannot Restore

No unsigned IPSWs available for this device.

MacBook Air (15-inch, M5)

Technical Specifications

Model Identifier

MacBook Air (15-inch, M5)

Board Configuration

J815AP

Platform

t8142

Chip ID (CPID)

33090

How to Install

Five simple steps to restore your device to factory perfection.

Backup Your Data

Make sure you have backed up your device using iCloud or iTunes on your PC or Mac. Otherwise, you may lose your data.

Connect Device

You can connect your device using a Lightning or USB-C cable to your PC or Mac.

Turn Off Find My

Go to Settings > [Your Name] > Find My > Find My iPhone/iPad, then turn off the feature.

Install .ipsw File

In iTunes or Finder (Mac), hold down the Shift key (Win) or Option key (Mac) and click "Restore iPhone...". Select your downloaded IPSW file.

Restore Backup

After the installation is complete, follow the on-screen instructions to restore your data from the backup you created in Step 1.