4U 4uKey
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Version 3.5.2 — May 2026

Download 4uKey

Free trial available for Windows and macOS. Start your recovery in minutes. A license key unlocks all six modes beyond the 3-attempt trial limit.

Platform installer

Choose your operating system.

Both installers include the full unlock engine. Your license key activates all six recovery modes on the number of devices covered by your plan.

v3.5.2 — Windows

Windows Installer

Windows 10 / 11 (64-bit) 87 MB SHA-256 verified
Download for Windows

Free trial — 3 unlock attempts included

v3.5.2 — macOS

macOS Package

macOS 12 Monterey or later 94 MB Notarized by Apple
Download for macOS

Free trial — 3 unlock attempts included

Activate Your License Key

Enter your key to remove the trial limit and unlock all 6 recovery modes.

No key yet? Purchase a license or contact support if you've already purchased and can't find your key.

Compatibility

System requirements.

4uKey runs on modern Windows and macOS machines. A USB cable and iTunes (Windows) or Finder (macOS) are required to connect your iPhone or iPad.

Requirement Windows macOS
Operating system Windows 10 / 11 (64-bit) macOS 12 Monterey or later
Processor Intel Core i3 / AMD equivalent or higher Intel or Apple Silicon (M1 / M2 / M3)
RAM 4 GB minimum (8 GB recommended) 4 GB minimum (8 GB recommended)
Free storage 200 MB for app + firmware cache space 200 MB for app + firmware cache space
iTunes Latest version from apple.com or Microsoft Store Not required — uses Finder
Supported iOS devices iPhone 6 and later; iPad (5th gen) and later; iOS 12 through iOS 26
USB cable Lightning to USB-A or USB-C; USB-C to USB-C for newer models

Release notes

What's new in v3.5.

Regular updates keep 4uKey compatible with Apple's latest iOS and macOS releases.

v3.5.2

May 2026 — iOS 26 beta compatibility

Added compatibility layer for iOS 26 Developer Beta 1 and Beta 2. Improved MDM detection for newer supervised configurations. Fixed a rare Apple ID pre-check false negative on devices running iOS 25.4.

v3.5.0

March 2026 — Screen Time engine overhaul

Rebuilt the Screen Time passcode workflow with significantly higher success rates on iOS 18 through iOS 25. Improved progress indicators and clearer pre-check messaging throughout the app.

v3.4.1

January 2026 — Native Apple Silicon build

Native arm64 build for Apple Silicon Macs (M1, M2, M3). Unlock operations run up to 2.4× faster on Apple Silicon hardware. Windows installer now supports ARM-based Windows 11 devices.

v3.3.0

October 2025 — SIM lock diagnostics

Introduced SIM lock diagnostics mode for carrier unlock analysis. Improved backup encryption reset compatibility with Finder-based backups on macOS 15 Sequoia.

Download FAQ

Common questions about downloading and activation.

Still need help? Visit the Support Center for documentation and ticket intake.

Yes. The free trial lets you run up to 3 unlock attempts across all modes with no license key and no payment required. Download the app and run it to see compatibility results before you buy.
Your license key is delivered to the email address used at checkout, usually within a few minutes of payment. Check your spam or promotions folder if it doesn't appear. You can also retrieve it from your order confirmation page or by contacting support with your order ID.
License keys follow the format XXXX-XXXX-XXXX-XXXX — four groups of four alphanumeric characters separated by hyphens. Keys are not case-sensitive. Paste the key exactly as it appears in your confirmation email.
The Starter license covers 1 PC or Mac. The Annual plan covers 5 devices and the Lifetime plan covers 10. You can deactivate a device from account settings to transfer your seat to a new machine.
Internet is required for license activation and for downloading firmware packages when needed. Once firmware is cached locally, screen passcode and Screen Time workflows can run without a connection.