How to root a OnePlus device with Magisk

Software needed:

OnePlus OTA Firmware
ADB Tools
Python
Payload-Dumper

Make sure bootloader is unlocked in Developer Options.

Whether already rooted or not, take the OTA update on the device. Boot up normally.

Install Python, make sure to check the box to add Python to “Path”

Create folder in the root of the c: drive called “tools”

Extract ADB to the c:\tools folder

Extract the payload-dumper files to the c:\tools folder and rename the folder to “payload”

Open the OTA firmware file using 7zip or other compression software and extract the payload.bin file to c:\tools\payload

Open a command prompt with administrative privileges, navigate to the c:\tools\payload folder and run the following commands:

python -m pip install -r requirements.txt

python -m pip install –upgrade pip (if needed)

python payload-dumper.py payload.bin

When this process is complete, grab the newly extracted boog.img from the output folder and copy it to the OnePlus device

Install Magisk from the Google Play Store and open the app

Click install and “Select and Patch a File” and locate the boot.img copied to the device

Copy the newly created magisk_patched.img file back to the computer in the c:\tools directory

Open a command prompt, navigate to the c:\tools folder and run the following commands:

adb reboot bootloader

fastboot devices (check that your device is listed)

fastboot flash boot magisk_patched.img

Continue normal start when complete

Open Magisk and click the install button and select “Direct install”

Reboot and check root status with a root checker app from the Google Play Store

You should now have root and may reuse this method when the next OTA is released. There may be quicker guides on XDA for maintaining root after installing an OTA if you prefer to search for those yourself.