Based on Android 7.1 Nougat, team CyanogenMod has now released the official CM14 Nightly builds for Nexus 6P. You can now flash CM14.1 Android Nougat custom ROM for Nexus 6P following the steps here.

Before you update Nexus 6P to Android Nougat CM14.1 ROM

Create a backup of your data for when you run into some problem during the process.Make sure that yourNexus 6P has at least 80% of battery life.Your deviceshould be rooted.You will need a recovery tool like TWRP (preferred) or CWM.Nexus 6P bootloader should be unlocked.Make sure to enableUSB Debuggingon your Nexus 6P.

Do note that this is a Nightly build. You might experience some features not working properly. Before proceeding, please visit the officialthreadfor more details and bug reports.

Steps to flash CM14 custom ROM for Nexus 6P

Required files:downloadCM14.1 Android Nougat custom ROM for Nexus 6P on your PC. Also, download Google Appsfor your device.

Step 1:

Connect yourNexus 6P to your PCusing USB cable and copy the downloaded filesto the internal storage of your device. Poweroff your device and unplug from the computer.

Step 2:

Boot your Nexus to Recovery mode: press and holdPower,Volume UpandVolume Downbuttons. Release them when you see the Bootloader or Fastboot menu. Use volume keys to navigate and Power button to select a choice. SelectBootloader>Recovery.

Step 3:

SelectBackup and Restoreto perform Nandroid Backup and then go back to themain menu. Next, wipe data by selectingwipe data/factory reset. Also,wipe cache partitionto perform cache wipe. Finally, Delvik Cache should also be wiped fromAdvanced>Wipe Delvik Cache.

Step 4:

Now, selectInstall zip from sdcard>choose zip from sdcardfrom the main recovery menu. Locate the CM14.1 Android 7.1 custom ROM.Select and confirm.

Step 5:

Follow the above step for installing GApps. After you are done,selectreboot system nowto reboot your Nexus 6P. It will take some time to load all files as this is the first boot after flashing, so don't be worried if it takes longerthan usual.