Can u suggest good Graphics cardYou would need to upgrade the graphics card to run Mojave. With what you've got, give Sierra a try.
i installed mac os with your Guidence thanks for helping but now problem is when i shutting down my computer its restarting automaticlly can u help me this it will be thankfull to you.You would need to upgrade the graphics card to run Mojave. With what you've got, give Sierra a try.