Android M is here, and boys have extracted all it’s components for enthusiasts to have a feel of the new OS on their older devices. The Android M launcher comes revamped, white in color, and no more horizontal scrolling of menus. Here’s how to install the Android M launcher on your device. Good thing you don’t need root to get this to work:
Download these 2 files
Install both apps on your phone.
Go to Settings > Apps> Find Google Now Launcher and tap on it, and tap Clear cache.
Also do the same for the Google App.
Now press Home button and enjoy Android M Launcher.