![]() ![]() If you want, you can simply boot Mac in a Verbose Mode. Solution 1: Troubleshooting via Verbose Mode A clash between different users and processes.SMC (System Management Controller) has been corrupted.Issues with Mac hardware or peripheral devices.A missing firmware or booting component.Let's get to know about the major causes of Mac being stuck on a white screen with proven ways to fix it. The situation happens mostly while booting when instead of loading the firmware, the system displays a plain white screen on the monitor. Though, there are times when we need to look for specific fixes for issues like Mac white screen. If you are lucky, then you would be able to fix the Mac screen frozen by following the above-listed general suggestions. Once it is done, you can boot Mac in the normal mode. Wait for a while as Disk Utility would try to repair Mac's startup disk. ![]() Now, select the "First Aid" option on the toolbar to repair the disk and confirm your choice by clicking on the "Run" button.As a dedicated window of Disk Utility would open, choose the startup disk from the sidebar.Select the "Disk Utility" option from here. This will boot your system in the Recovery Mode and launch the macOS Utilities window.As it restarts, press and hold the Command + R keys at the same time for a few seconds.Turn on your Mac or restart it if it is already power on.Here's how you can fix Mac black/white/green screen by repairing its startup disk. Since Mac lets us repair a disk on its own, you can take the assistance of Disk Utility to do the same. Most of the time, an issue like Mac stuck on a login screen usually happens due to a corrupt or malfunctioning disk. This means the system has been started with new PRAM settings. Once you hear the startup chime for the second time, release the keys. Keep holding them until your Mac would restart.Turn it on and press the P + R + Option + Command keys at the same time as Mac restarts.Firstly, turn off your Mac by long-pressing the Power switch and wait for a few seconds. ![]() Therefore, if you have got a black, white, or gray screen on Mac, then you should consider resetting its PRAM first. Apart from handing other vital system processes, it is also responsible for Mac's booting too. PRAM, which stands for Parameter Random Access Memory, is one of the major components in Mac.
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