International Galaxy Note 4 handsets with the SM-N910F model number are now officially supported by the latest CyanogenMod 12 nightly ROMs. You can now have lollipop without touchwiz.
CM12 is based on Google’s latest Android 5.0 software, so it delivers features like lock screen notifications, improved multitasking, and significantly better performance and battery life. And because it’s not TouchWiz, you get Material Design as it was intended.
Only nightly ROMs are available right now. This is a non stable software — there will be some bugs and other issues.
I personally would not recommend this, not unless you like experimenting and your Note 4 is not your main device.
Custom ROMs require an unlocked bootloader and a custom recovery, and that means tripping your Knox counter on the Note 4, which voids your warranty. Right now, there’s no way to avoid that, and no way back, so you’re on your own if anything goes wrong later.
If that doesn’t put you off, you’ll find the first CM12 nightly for the Note 4 on the CyanogenMod downloads page linked below, weighing in at 257MB.
Source- http://www.cultofandroid.com