Cyanogen has after much waiting finally released Cyanogen OS 12 for the OnePlus One. Cyanogen OS 12 is based on Android 5.0 Lollipop and combines the best of Android and Cyanogenmod. While the OTA has already been released, it could take a few days before it reaches your device as it is being rolled out in stages.
It is still possible to sideload Cyanogen OS 12 on your device, this doesn’t void the device’s warranty or delete any apps on your device. It does require an unlocked bootloader. Follow the guide bellow to sideload Cyanogen OS 12 on your OnePlus One
I received “Status 7 Error”: This error appears if you have modified the System Partition in any way. Reinstall CM11S on your device and try the installation process again.