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. Just log-in to the administrator account and let the system boot correctly.It will automatically boot in the safe mode instead of the normal mode. Press and hold the Shift key as your Mac would turn on.Turn off your Mac if it isn't already.Furthermore, it will help you diagnose the reasons behind Mac Pro frozen screen as well. This will restart your system without any unwanted third-party or network process running in the background. If there is a problem related to a certain process or application in your Mac, then you should consider booting it in the safe mode. Wait for at least 15-20 seconds and press the Power key again to turn it on.If it won't work, then you can just remove the battery of your notebook or disconnect the main power supply of the desktop as well.It is mostly located at the top of the keyboard. To forcefully turn off Mac, press and hold the Power key.This will reset the present power cycle of the system and let you get back full control of it. If there was a minor issue with the firmware, then a forceful restart would fix it. If your Mac is stuck on the loading screen or has got a white/black/gray screen of death, then you can consider turning it off. Once it is done, try to restart Mac and check if it boots normally or not. Simply remove all the peripheral devices and only connect a mouse and keyboard to your desktop (genuine Apple products). If you are using a third-party peripheral device (like a Bluetooth speaker or mic), then it can tamper with the booting of the system at times. Solution 1: Disconnect all peripheral devicesĪs surprising as it might sound, this is the easiest fix to a Mac screen frozen issue. Before we discuss various issues and solutions individually, let's quickly consider some recommended solutions, suggested by the leading experts. It doesn't matter if your Mac is stuck on the loading screen or whether it has got a white screen of death – some solutions seem to fix Mac screen frozen issues of all kinds. Specific Ways to Fix Mac Stuck on Loading Screen
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