You may have already updated your Nexus device to Android 5.0.1. The notification popped up on my Nexus 9 several days ago. The update is rolling out slowly to other devices like the Nexus 4 and Nexus 6 so if you are using those devices it may not have rolled out to your device yet. No worries the updates have been pulled and are available in zip flashable form. You will need to have a working adb setup on your device as you will be adb sideloading these. Download: Nexus 9 (from LRX22X to LRX21R) Nexus 7 2013 Wifi (LRX22X to LRX21P) Nexus 7 2013 (LRX22X to KTU84P) Nexus 10 (LRX22C to LRX21P) Nexus 10 (LRX22C to KTU84P) Nexus 4 (LRX22C to LRX21T) Nexus 6 (LRX22C to LRX21O) How to ADB sideload an update on Nexus devices.