Tuesday, April 29, 2025

Google Fixes Untrusted Device Error on Older Chromecasts with New Update

Google has fixed a problem that affected some older Chromecast devices, including the second-generation Chromecast and Chromecast Audio. The issue started after users received an “untrusted device” error that stopped them from casting media with apps such as YouTube. This error prompt frequently indicated that the problem could be caused by outdated device firmware.

The issue was that a security certificate included in these devices had expired. The ten-year certificate of validity was disapproved by apps that relied on it to authenticate the device. As a result, many users believed that Google had quietly discontinued support for such older devices, especially since newer models of Chromecast devices, such as the third-generation and Chromecast Ultra, were not affected.

Google acknowledged the issue and apologized for the inconvenience, ensuring that they were working around the clock to correct the issue. Google warned users against performing a factory reset while they made a solution, so the set-up wouldn’t be complex when the solution was available.

To resolve the issue, Google released a software update that would restore functionality to the affected devices. Users had to keep their Chromecasts plugged in with Wi-Fi to receive the update, which took several days to finish. For users who had already performed a factory reset, Google recommended updating the Google Home app to the latest version in an attempt to re-configure their devices.

The Google Home app update, Android 3.30.1.6 and iOS 3.30.106, includes functionality to restore and configure Chromecasts that were made useless after a reset. Google claimed that everything should now work as usual for these devices.

Despite the patch, speculation regarding the cause of the issue persisted. The majority of individuals believed that the expired certificate was the primary reason for the failure. Google did not officially confirm this rumor, though.

The timing was inauspicious, shortly after Google had suspended the sale of some of its Chromecast variants to focus on newer releases. This was an ominous sign that hinted at the possibility of end-of-life, but Google took steps to clarify that the issue was simply a bug and not a bid to discontinue support.

At the same time, affected users were asked to keep their devices plugged in and connected to the internet in order to receive the update. Google also encouraged users to visit the Google Nest Community page for further updates regarding the issue.

The fix is to reserialize the devices to use a new certificate authority so these legacy Chromecasts will continue to function for many years to come. This move alleviates concerns that Google will abandon its older products and demonstrates that the company is concerned about maintaining compatibility with its product line.

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