In some cases a pink screen is resolved by a reboot, upgrading your Mac's operating system or NVRAM or PRAM reset, booting into Safe Mode, or by removing the software you downloaded beforehand. Disconnect the external monitor if you are using one. Disconnect all accessories that are attached to your Mac. Apple Diagnostics might uncover hardware issues. If you still encounter a pink screen on macbook pro, the internal display components or graphics hardware could be the problem.