Mac White Screen: How To Fix Your Mac That Won't Turn On. You wanted to use your Mac, but instead, your Mac won’t start up? Does your Mac computer stuck on a white / gray screen (after a start up chime)? Does your computer get stuck at the Apple logo? Sometimes an error or issue with your OS X operating system may cause your computer to stop functioning properly and display a white screen. There can be several reasons why a computer won’t boot. You wanted to use your Mac, but instead, your Mac won’t start up? Does your Mac computer stuck on a white / gray screen (after a start up chime)? Does your computer. President Trump is expected to end the Obama-era program that protected young undocumented immigrants from deportation, according to reports. Under the Deferred. However there are several tips you can try to fix it. This article explains how to fix this white screen issue so your Mac can work as normal. Devices: Mac. Book Air, Mac. Book Pro, i. Mac, Mac. Book, Mac Pro. Before doing anything, you may want to make sure that you have a copy of your information to use if your Mac becomes unusable. So you may want to try backing up now before doing anything. Backing up may be possible even if your Mac does not boot. If you have already backups, then you may skip this step. You may be able to use OS X Recovery to backup your Mac. Here is how to back up your mac that will not start up: Connect your external hard drive. You need this because you need to back up your Mac to an external drive as you are having issues with your Mac. Also make sure that this external space has enough free space to store your data. Shut down your Mac. Turn on your Mac and, immediately after the start up chime, hold down the Command and R keys at startup until you see the Apple logo. Wait until you see the OS X Utilities window. Select Disk Utility and Click Continue. In the sidebar, select your drive that you want to back up, like Macintosh HDClick Verify Disk, if this verifying disk process finds an issue, click Repair Disk. In the toolbar, you will see the “New Image” icon. Choose your external drive to save this. This will create a compressed disk image of your disk’s contents. Note these steps may be slightly different for different version of OS X. Please check to see (by rebooting your Mac) if your issue if resolved after performing each step. Shut down your Mac by holding down the power button. Disconnect all peripherals (printers, scanners, USB devices etc) that are plugged in to your Mac, except the mouse and keyboard. After disconnecting everything, try restarting your computer. If you Mac starts without any issue, this means that one of your accessories is causing this. Try to figure out the problematic peripheral(s) by reconnecting your accessories one at a time. If restarting your Mac with your peripherals disconnected does not work, try this step. Try safe mode (or safe boot) if you Mac does not start up. Safe mode is diagnostic mode designed to fix OS problems. Thus safe mode can be a useful troubleshooting method. Here is how you can start your computer in safe mode. Shut down your Mac and wait at least 1. Restart your Mac. Press and hold the Shift key as your computer restarts. You need to press the Shift key immediately after the star up sound/chime before the Apple logo appears. Release the key when you see the gray Apple logo. Be patient because safe mode is slower. Mac starts up, restart your Mac normally without pressing any buttons. Try repairing your start up disk by opening Disk Utility in OS X Recovery. Please follow these steps: Turn off your Mac. Restart your Mac and hold option+R keys immediately after the Apple startup chime. Keep holding the buttons until you see the Apple logo. When your computer starts up, you will see the OS X utilities menu. Select Disk Utility and click Continue. Select your start up disk. Click Repair Disk. Then reboot your Mac. You may want to reset “non- volatile random- access memory” or NVRAM. Follow these steps: Turn off your Mac. Wait at least 1. 0 seconds. Turn on your Mac. Press and hold the Command- Option- P- R keys immediately after the start up sound. Your computer will restart (keep holding the keys)Release the keys when you hear the second start up sound. This process will reset NVRAM. Resetting the System Management Controller (SMC) may fix your problem. Here is how: Follow these steps if your have a modern Mac notebook (like Mac. Book Air, Mac. Book Pro) without a removable battery: Turn off your computer. Connect the power adapter. Press the Shift- Control- Option keys and the power button at the same time. Then release all the keys at the same time. Reboot your computer. Follow these steps if you have an older Mac notebook with removable battery: Turn off your computer. Disconnect the power cord. Remove the battery. Hold the Power Key for five (5) seconds, then release the power button. Reconnect your battery and power cord. Turn on your Mac. Follow these steps if you have an Intel- based Mac Pro, i. Mac, and Mac min. Turn off your computer. Disconnect the power cord, wait fifteen (1. Wait five (5) seconds and turn on your computer. Reinstalling OS X may fix this and you may use OS X Recovery to do this. Here is how: Shut down your Mac. Turn on your Mac and hold the Command and R keys immediately after the Apple startup chime until you see the Apple logo. Select Reinstall OS X and follow the instructions. See also: i. Pod Touch 5th Generation Won’t Turn On?
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