Android 6.0 started rolling out to the OnePlus One early last month. It came in the form of Cyanogen OS 13.
The update took its time rolling out. Then OnePlus pushed out a bump. Most users should have received both by now.
But let's say you haven't. Or maybe you messed up your device and are now trying to recover. Hey, no judgment here. Either way, full images are now available for manual download.
You can find .zips and .img files on Cyanogen's site. You have your choice of updating using fastboot or ADB sideload. Hit up the link below and scroll down to the OnePlus One. You can also do a search for ZNH0EAS2JK.
- Cyanogen Support