CyanogenMod has introduced the CM 13 nightlies Rom based on Android 6.0 Marshmallow for Google Nexus 7 (deb & flo), LG G4 (h815), Samsung Galaxy Tab Pro 8.4 (mondrianwifi), LG GPad 7.0 (v400 & v410), LG G3 Verizon (vs985) and Motorola Moto X 2014 (victara).. The company has officially announced that it’s planning to roll out the CM13 custom ROM. But the builds for OnePlus One and Galaxy Tab 8.4 are only available to download while the builds for the rest of the devices will be made available later this year.
Android 6.0 Marshmallow brings features like Doze-battery saver application that will keep the device into a deep sleep if the phone is idle for some time. Now-On-Tap-now on tap is a google now functionality that will show the details of the current screen information if the home button is pressed hard. Native fingerprint sensor support.
You can dirty flash the CM 13 build from CM 12.1 assuming that you update the add-ons like Xposed, GAPPS and others. Before you flash the CM 13 build backup your data, apps and wipe any unofficial, XDA or self-made builds of the CM 13 source code.
Head over to CM website to download the ROM: Here