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If graphics tasks slow down your Mac
If your Mac laptop is slower than expected when you perform graphics-intensive tasks, such as playing games or editing video, open Battery settings. Depending on your Mac, you may see options that let you improve graphics performance in exchange for greater power consumption.
On your Mac, choose Apple menu > System Settings, then click Battery in the sidebar. (You may need to scroll down.)
Click Options on the right, then turn off “Automatic graphics switching.”
Your Mac then always uses high-performance graphics.
If your Mac laptop is running on battery power, you might also be able to improve graphics performance by plugging in the power adapter.