Dell Wyse ThinOS Version 9.1.4097, 9.1.4234, 9.1.5067, and 9.1.6108 Operating System Release Notes

Upgrade from ThinOS 8.6 to ThinOS 9.1.4234 using Wyse Management Suite

If you are running any ThinOS 8.6 version, you must first install the ThinOS 8.6_807 image with the latest BIOS version, and then upgrade to ThinOS 9.1.4234. For the latest BIOS versions, see Tested BIOS version for ThinOS 9.1.4234.

The device reboots after the ThinOS image is downloaded. Once the upgrade completes, the device is automatically registered to Wyse Management Suite. Dell Technologies recommends you to back up your device settings before you initiate the upgrade process. All device settings are erased after you upgrade from ThinOS 8.6 except the following settings:

• Wyse Management Suite group token and server settings
• Static DNS
• Certificates
• IEEE802.1x wired authentication settings
• Wireless connections—The WEP/Sharekey security type is changed to Open as they are not supported in ThinOS 9.1.4234
• Proxy settings