Signed
audioOS 27.2 (24K122) is signed
Apple's signing server is signing this firmware, so you can restore or update to it now. Checked with Apple .
Signed since release, Oct 26, 2026. Apple lists it until Feb 3, 2027.
Released October 26, 2026
Download OTA (.aea) 3.2 GB
From updates.cdn-apple.com (Apple). Signet never hosts files.
Restore images (IPSW) 2
1 older release is no longer signed. Apple still hosts the files, but a device can't restore to them.
| Version | Released | Status | Expires | Size | |
|---|---|---|---|---|---|
| audioOS 27.2 24K122 OTA | Oct 26, 2026 | Signed Signed by Apple Signed since release, Oct 26, 2026. Apple lists it until Feb 3, 2027. Apple doesn't publish signing end dates; Signet records them by checking on a schedule. | Apple's listed expiration Apple's update server (gdmf.apple.com) lists this build until February 3, 2027. Apple can stop signing it sooner, usually a week or two after the next release. | 3.2 GB | |
| audioOS 26.6 23L773 | Aug 3, 2026 | Not signed No longer signed Replaced by audioOS 27.2 on Oct 26, 2026. Unsigned since Signet's first check, Oct 19, 2026. Apple doesn't publish signing end dates; Signet records them by checking on a schedule. | ~ Estimated Apple doesn't publish when it stops signing a build. audioOS 27.2 replaced it on Oct 26, 2026, and Apple usually stops signing the older build a week later. Signet's first check, Oct 19, 2026, found it unsigned. | 4.1 GB |
Over-the-air updates 2
The exact packages Apple's update server offers this device. Encrypted (.aea) packages list the key Apple publishes with them.
| Version | Type | Size | Package | |
|---|---|---|---|---|
| audioOS 27.2 24K122 | Full | 3.2 GB | Encrypted .aea | |
| audioOS 27.2 24K122 | Update from 22J357 | 1.9 GB | Encrypted .aea |
How to decrypt an .aea package
On macOS 13 or later, Apple's own aea tool does it. Each row's Key button copies that package's key. For the newest package, the whole command is:
aea decrypt -i fc7ceb82a21dca85d2e6bd223358223bee99fdd325f0f0cc6b8c4d9e767917d1.aea -o fc7ceb82a21dca85d2e6bd223358223bee99fdd325f0f0cc6b8c4d9e767917d1.aar -key-value 'base64:frCBljnn6W7nsB9qrGktrW4wop/vRK8GPT1B54k+/1c='Specifications
- Wireless
- 802.11n Wi-Fi
- Bluetooth 5.0
- Thread networking technology
- Ultra Wideband chip for device proximity
- Sensors
- Temperature and humidity
- Accelerometer
- Size & weight
- 168 × 142 mm, 2300 g
- Colors
- Midnight
- White
Source: Apple Tech Specs