If you boot from your Mac's internal drive, power it down and on again while holding down the Options key on the keyboard. When the startup manager appears, if you see your startup disk in the options, select it. If that doesn't work, repeat the process but this time select Recovery HD from the startup manager. Your Mac should now boot from its recovery partition.
Select Disk Utility from the Utilities menu. When it opens, choose your startup disk and then click the First Aid tab. Click Repair to verify and repair the disk and then try and start up normally.
I See a Flashing Question Mark on the Screen When Booting From My SSD (Mac) | United States
Still no joy? Persistent blue or grey screens when you boot up your Mac tend to be caused by a peripheral. Power off the Mac. Disconnect everything except the power and the keyboard and mouse if external , and now restart. If the Mac starts up normally, it's a problem with a peripheral. To find out which one is at fault, reattach them one by one and start up each time, until the problem reoccurs.
Once you've found the culprit, Google the problem and the name of the peripheral to find out what others have done to fix it.
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If the Mac won't boot with all peripherals disconnected, try booting in Safe Mode by holding down the Shift key when you restart. Occasionally, doing that then restarting fixes the problem. If not, boot into the Recovery partition and follow the steps in the problem above. When you turn on your Mac you should hear a tone. The type of tone can change depending on any problems your Mac might be experiencing, so they are a good way of figuring out what's preventing your Mac to properly start.
First of all, check that the Mac is connected to a power supply, and that the power cable is secure. Then you should check that the power socket is switched on and working. Test it with a lamp! Next, eliminate the possibility that it's a display problem. Is there a startup chime? Can you hear the fan? Is the sleep LED lit? Does the caps lock key light up when you press it? System Information shows that this Mac has booted into Safe Mode.
If you know what apps were recently updated, try removing them from the list of login items and then reboot normally to see if the problem is fixed.
If a flashing question mark appears when you start your Mac
To remove an item, just highlight it by clicking on the item name, then click the minus sign — button below the list. After removing a login item from the list and verifying that the system boots normally afterwards, you may wish to contact the developer with a bug report, or try removing and re-installing that app. NVRAM stores information in between boots of your Mac, things like the startup disk, video and display information, volume for the system startup chime and speaker, time zone information, default system fonts, and more.
When resetting NVRAM, this data is all wiped from the Mac so you may need to readjust things like your screen resolution, mouse or trackpad tracking speeds, etc…. The Mac chimes once to signify that it has begun booting, then a second time to signify that the NVRAM has been reset. After this point, let up on the keys and let the Mac boot as usual.
Resetting the SMC is another tool in your toolbox of white screen solutions. The reset process is different for different Mac models, so be sure to read the section below that pertains to your Mac. The charging light on devices with MagSafe adapters may change colors, indicating that SMC has been reset.
Reboot and Repair the Boot Disk The next item on your troubleshooting list should be rebooting and then trying to repair the boot disk by entering into Recovery Mode:. This can be the perfect time to upgrade that smaller, slower drive with a new one from MacSales. Boot the Mac into Verbose Mode Booting a Mac into Verbose Mode is like booting a Linux machine without the fancy graphical user interface — you just see a lot of text scrolling by quickly, listing all of the various things that are happening during boot. OS X booting in Verbose Mode. If this happens, reboot the Mac while holding down the Option key on the keyboard.
Click on that icon and press the return key, and the device should reboot normally. Should that drive icon not appear, then you likely have a bad or failing SSD or hard drive and should replace it immediately. Do you have your own tips or quick answers on banishing the white screen? Let us know in the comments below.
- Mac White Screen: How To Fix Your Mac That Won't Turn On - macReports.
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Login is possible, but goes to white screen. I have also white screen with a? Any simple solution. I have tried every option listed on the internet for the white screen and still have the white screen!! Hey, I have the same problem with my macbook air. How did you solve the white screen problem? I have been trying everything and nothing worked.
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No internet recovery, goes from saying this to white screen???