Apple logo
When you see the Apple logo appear, it implies that the PC has discovered the startup file “boot.efi” on your startup disk. This advises your Mac where to find the System folder on your startup disk.
Progress bar
After your Mac finds the System Folder on your startup disk, an advance bar or turning wheel appears on the screen. This tells you that your Mac is perusing files from the OS X System folder
What is White Screen on Boot Problem?
It’s not generally a dark screen, as weird as that may sound. The “dim screen” issue can likewise show itself as a dark screen; really, a screen so dull you may botch the show as being fueled off.
This is particularly valid for Macs with worked in Retina shows, for example, the Retina iMac models that don’t have a power on pointer.
We call the startup issue the dim screen issue because generally, the show would turn dim amid the startup stage when the issue struck. These days, with the later Retina Mac models, will probably observe only a dark or exceptionally dim show. All things considered, we’ll keep on calling this the dark screen issue, as that is the name that is most outstanding.
The dim screen issue can happen directly after you begin or restart your Mac. The issue is described by the show transforming from the blue screen that happens at control up to a dark screen. You may not see the blue screen as it has a tendency to pass by quick. It is additionally conceivable that your particular Mac demonstrate does not show the blue screen. Apple has been streamlining the startup procedure, os the times of numerous screens writes amid startup are blurring endlessly.
At the point when your MacBook hangs at startup, it could demonstrate an equipment or programming related issue. Equipment related issues can be distinguished by running Disk Utility. In the event that your hard drive is coming up short, you ought to quickly endeavor to move down all the data on your PC to forestall losing significant business information, for example, contacts, email, ventures and solicitations. At that point, take your MacBook to an Apple Store or repair shop to introduce another hard drive. On the off chance that the issue is programming related, you can get your MacBook up and running again with a couple of investigating steps.
Safe Boot
MacBooks running OS X 10.2 or later can start up in Safe Boot Mode to run a mechanized disk check and repair utility. Safe Boot likewise debilitates any non-basic framework forms and enables you to decide whether your turning wheel is the aftereffect of another application causing issues on your framework. Hold down the “Move” key when you begin your MacBook. At the point when the Apple logo appears, you can discharge the Shift key. Sit tight for your PC to complete the process of running indicative tests and repairing the disk and authorizations, if essential. At that point, reboot your PC regularly to check whether Safe Boot settled your concern.
Boot into Disk Utility
For OS X Lion and Mountain Lion users, take a stab at booting into the Disk Utility. Hold down “Summon R” until the point when the Apple logo appears. At the point when a rundown of choices appears, dispatch Disk Utility and open the First Aid tab. In the First Aid tab you can check and repair disk authorizations and confirm the hard disk. On the off chance that the hard disk reports any mistakes, select the repair choice to check awful segments of the hard disk and endeavor to repair undermined framework files.
RAM Issues
Expel everything except the base measure of RAM from your Mac. In the event that you added any RAM to your Mac after you got it, evacuate that RAM, and afterward check whether your Mac begins regularly. In the event that it does, at that point at least one bits of RAM have fizzled. You should supplant the RAM, despite the fact that you ought to have the capacity to keep working with your Mac until the point when you get the substitution RAM.
Startup Drive Issues
With RAM as a conceivable guilty party off the beaten path, it’s a great opportunity to focus on your Mac’s startup drive.
The suspicion now is that your Mac’s startup drive is having issues that are keeping your Mac from effectively beginning up. In any case, before we do anything extraordinary, we have to check that your Mac can begin from an OS X or macOS introduce disk, the Recovery HD, or another startup drive, for example, an outer hard drive or a USB Flash drive that contains a bootable OS. Assuming this is the case, at that point your startup drive is likely the issue.
When you see the Apple logo appear, it implies that the PC has discovered the startup file “boot.efi” on your startup disk. This advises your Mac where to find the System folder on your startup disk.