As you might seen, Android 6.0.0 is live as factory images for now. ROM FLASHABLE ZIP Works like a charm in Multirom, so fell free to download it to install it as secondary rom.Bootloader is new. Grab it from here and flash it with Fastboot.Radio is the same as DP3, so if you tried Android M Developer Preview 3, and flashed its radio img, there is no need to do it once again. For people using Lollipop radio, you can obtain Marshmallow radio img here . flash it with fastboot too.BOOTLOADER + RADIO FLASHABLE ZIP FROM LEAN ROM DEV, ANDROID 6.0.0 IMAGES https://www.androidfilehost.com/?fid=24052804347830321 You can have a look at a quick video I made about Marshmallow here Im not able to answer everybody so I will write 2-3 things here.This zip doesn't wipe data, cache, or dalvik. It only writes the system, and flash kernel. You have to full wipe including system partition if you want to get it working properly. Custom kernels are supported, and SuperSU used version must be at least 2.50 Beta.To finish, if it doesn't boot for you, make sure you updated bootloader and radio to the M ones. If your phone can't boot at all, try another ROM. If it doesn't boot either, consider checking persist partition.Enjoy it