Your startup disk will check for errors and make repairs, and only use the required kernel extensions. This mode will also prevent the startup and login items from opening when your Mac starts up.
It disables custom user-installed fonts and clears a number of macOS system caches too. This can make it hard to attempt a fix.
It's called Apple Service Diagnostic, and we'll show you how to get it and use it for best results. This is ideal if you have problems with your hard drive or recovery partition. This includes date and time, volume, desktop settings, and so on. Shut down your Mac, power it up, then immediately hit the key combination above.
Wait till your Mac reboots again, then let go of the combination. Most Apple computers use the combination of keys provided above, but some models require you remove batteries or remove the power cord instead. Recovery mode is your ticket to solving many macOS problems from a friendly environment.
Here's a troubleshooting guide to help get your external hard drive or flash drive working again. Later you also may want to restore it. Here's how to do both. If you want to transfer files from one Mac hard drive to another, Target Disk mode makes it simple. By starting a Mac in Target Disk mode, you can connect it to another Mac and copy files to and from the drives. In essence, it turns your Mac into a hard drive enclosure.
Apple states you can use:. 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. 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.
Login is possible, but goes to white screen. I have also white screen with a?
To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or immediately. Here's a look at seven essential Mac startup options that every OS X see all of the bootable devices appear on your screen accompanied by.
Any simple solution. This MacBook is the only one I have, so if possible I need this fixed.
How can I go about fixing this, or should I just give up? Don Bourassa Don Bourassa 11 2 2 bronze badges. Welcome to Ask Different. Your question is at risk of being closed because it's very difficult to understand. Please see How to Ask for info on asking questions then do your best to clearly describe your hardware, the problem you're having, and what you've tried to resolve it yourself.
To create the recovery disk, Lion OX X In other words, an internal Lion recovery partition. The Overflow Newsletter 3 — The 36 lines of code that changed history. Featured on Meta. Feedback post: Moderator review and reinstatement processes.