Settings > System > Update Software tells me there's an available update. I select to "Download and Install" it. The progress bar goes across as expected. After about a minute, I select to "Update Now". The screen blanks for a second, and I briefly see a "Step 1 of 2" screen, then I get:
Apple TV Update
The update was not successful.
To restart your Apple TV and try again, go to Settings > System and choose Restart.
I choose "OK" (the only option), restart the device, and try again, but the same thing happens.
Thoughts?
See http://adcdownload.apple.com/iOS/tvOS_beta/tvOS_beta_Software_Installation_Guide.pdf
1. Download the tvOS beta 2 software restore image from the Apple Developer download page on your Mac.
2. Launch iTunes on your Mac
3. Ensure the Apple TV is connected to your Mac.
4. Using the included remote, press and hold MENU + Play/Pause for 6 seconds until the indicator light begins flashing rapidly.
5. Hold the Option key and click Restore Apple TV in iTunes
6. Select the tvOS beta software restore image from step 1 and click Open to begin installation.