Android M was released at Google I/O 2015 and now Google has officially released android M factory image for nexus 5, nexus 6, nexus 7, nexus 9 and player. Nexus 4, nexus 10 and nexus 7 2012 have not received the update yet officially. By installing the android M [android 6.0 Marshmallow] on your nexus device you will be able to experience the latest android OS with new features like http://littlebitjohnny.blogspot.com /2015/06/android-m-will-not-give-you-error-927-let-you-install-apps-on-sdcard.html" target="_blank">move apps to sd. This is the final release for nexus devices.

Warning : Flashing the android M will erase entire data stored on your nexus device. So before doing anything backup your data.

Downloads

Nexus 5 (GSM/LTE) hammerhead : hammerhead-mra58k-factory-52364034.tgz

How To Install Android 6.0 Marshmallow MRA58K Factory Image On Nexus 5

• Download and install android SDK. This also includes Google USB drivers.
• Download the android Marshmallow system image for Nexus 5 from above and unpack it in android sdk>platform-tools folder.
• Enable USB debugging on your Nexus device by going to ‘Settings>Development>Debugging’.
• Power of your phone. Connect the nexus device to PC.
• Enter into bootloader mode by pressing and holding ‘volume up’, volume down and power button. Alternatively connect the phone to PC and open a command window in platform-tools folder and run the command ‘adb reboot bootloader’.
• Execute the command ‘fastboot oem unlock’. A prompt will appear on your phone to confirm. It will wipe entire data.
• Now execute ‘flash-all.bat’ command. If you are using a MAC then type ‘flash-all.sh’. This will install the latest android M developer preview 3 on your Nexus 5.
• After flashing you can again lock the bootloader by typing the following command and executing 'fastboot oem lock'.
• Now go on testing the new android 6.0 Marshmallow.

You have successfully updated your Nexus 5 to official android 6.0 Marshmallow MRA58K firmware.