Unlock Bootloader And Root Nexus 7 2013 On Android 4.3

Prerequisites:

• Fastboot (download from here)
• TWRP recovery image (WiFi or LTE, depending on your tablet’s version)
• SuperSU binaries from: download.chainfire.eu/supersu
• ADB installed and configured on your Windows PC. Follow our guide on how to set up Android ADB and fastboot on Windows for instructions.
• Android USB driver for Nexus 7 installed on you computer.
• Backup your data. Follow our: How to completely backup your Android device on PC without root access guide to make a full backup.

Unlocking Nexus 7 2013 Bootloader:
Step 1: Extract the fastboot file and place it in the same location where ADB is installed.
Step 2: Turn on USB Debugging on your Nexus 7 and connect it to the PC using USB cable.
Step 3: Open a command prompt where you had placed the fastboot file, and run the following command:
adb reboot bootloader
Step 4: Once the device has rebooted into bootloader mode, run this command in command prompt:
fastboot oem unlock
Step 5: Follow the on-screen instructions, and once those are complete, reboot the device. The bootloader is unlocked.
Install TWRP Recovery on Nexus 7 2013:
Step 1: Extract the appropriate recovery.img file for your device to the same location where you placed fastboot, and launch a command prompt window again.
Step 2: Ensure that USB Debugging is enabled, and that your new Nexus 7 is connected to the PC via USB cable.
Step 3: Launch a command prompt window at the same location where you have placed recovery.img, and reboot into bootloader mode using:
adb reboot bootloader
Step 4: Now run the following command, replacing recovery.img with the actual name of the recovery file:
fastboot flash recovery recovery.img
Step 5: Once flashing is complete, reboot Nexus 7 again.
Rooting Nexus 7 2013:
Step 1: Place the SuperSU ZIP file at the root of your device’s internal memory/SD card, and reboot it into recovery using the volume down + power button combo.
Step 2: Hit Install and navigate to where you placed the SuperSU binary.
Step 3: Flash the ZIP file, which should take merely a few seconds.
Step 4: Post flashing, reboot the device.