I own the Nexus 9 (Wi-fi model) and am running Android 6.0 MRA58N, rooted with the TWRP recovery. I wanted to to update to android 6.0.1 so downloaded the latest factory image (MMB29R) from Google’s website. I rebooted to TWRP so I could flash the new image. When I realized that you cannot flash system.img through TWRP I had already flashed the boot.img. I attempted to reboot only to get stuck in a bootloop. "Luckily me" I had taken a backup through TWRP previously (boot, data and system). So I went again in TWRP, factory reset and restored (successfully as per the message) the backup. Now every time I boot I see Google’s logo, then the "Your device is corrupt" message, that I’m seeing since I installed TWRP (it doesn’t seem to affect anything) and then a blank screen that goes on forever.
Any suggestions?