Wait five seconds, then press the power button to turn on your Mac. How to Reset the SMC On a MacBook With a Non-Removable Battery. Power down your MacBook. Unplug the MagSafe or USB-C power adapter from the MacBook. Using the built-in keyboard, press Shift-Control-Option on the left side of the keyboard, then press the power button at the same.

• Press Flail To Fail Mac Os 7
• Press Flail To Fail Mac Os 10 15 7
• Press Flail To Fail Mac Os Sierra

1. In this article, I’m going to show you the complete guide to fix VirtualBox errors while installing Mac OS X. Most of the website that creating content regarding the installation of Mac OS X El Capitan or macOS Sierra on VirtualBox is not complete and have errors. The article might be correct and work on one device perfectly and without any problem.
2. Install Mac OS On VirtualBox Virtual Machine Steps. 2.1 Create MacOS Virtual Machine In Virtualbox. Open virtualbox, click New button to create a new virtual machine. Input macOS high sierra or macOS mojave in the Name field, select Mac OS X in Type drop down list, select Mac OS X(64-bit) in Version drop down list, then click Next button.

The other day a co-worker needed to borrow a Mac, so I grabbed an older MacBook Air from storage. I decided to wipe out the laptop’s flash storage and install a fresh version of OS X. I created a bootable USB flash drive installer, plugged it into the laptop, pressed the Option key as the machine booted, and then selected the USB drive as the boot disk.

I then ran Disk Utility to reformat the drive and then ran the installer to install OS X. It looked like things were moving along, until this appeared on the screen.

I created another boot disk using a different storage drive, in case it was a hardware problem, but I got the same error. I figured that the fact that the laptop had been in storage for a while had something to do with it, and it did.

Note: This fix should work with OS X Mavericks and El Capitan. It also worked for me with macOS Sierra, which shows a different error message (“The installer payload failed signature check” pops up near the end of the installation) than the one that appears for El Capitan and Mavericks.

How to fix the problem

The installer checks the date on the computer. If the date isn’t current, you get the error above. The fix involves correcting the date on your Mac.

If you have an older OS on the Mac

If you have a complete OS on the Mac already, boot into it. Fix the date in the Date & Time system preference (Apple menu > System Preferences). Reboot using the USB boot disk, and you should be able to proceed with the installation.

If you don’t have an OS on the Mac

If you are in a situation like I was, and you don’t have a complete OS on your disk (you reformatted it), you’ll find that there’s no way to access the Date & Time system preference when you use an external USB boot installer drive. The Apple menu doesn’t give you access to System Preferences. You have to use the Terminal to set the date and time.

If you use an external boot disk, you Mac starts up into OS X Disk Utilities. You can access the Terminal by clicking on the Utilities menu and selecting Terminal. Once the Terminal has launched, follow these steps.

1. At the prompt, type date to see the date that’s on the Mac. For example, here’s the date of the MacBook Air I worked on.

1. If your Mac is connected to the internet, you can tell your Mac to check online for the current date and time. You can do this by typing at the prompt ntpdate -u time.apple.com and then pressing Return.

Your Mac should now have the current date and time. If you enter date again (as I did in the screenshot above) the information that appears will be current. You can now run the OS installer.

If you don’t have an internet connection

You can still use Terminal to set the date. Go into the Terminal as described above, then follow these steps.

1. At the prompt, type date to see the date that’s on the Mac.
2. Figure out the numerical representation of the date and time. The pattern you need to follow:
   • Month: in two-digit format. For example, July is 07.
   • Day: in two-digit format. For example, the 19th is 19. Another example: the 7th is 07.
   • Time: in military format of hours and minutes. For example, 2:00 p.m. is 1400.
   • Year: Last two digits.

In my example, the numerical representation is 0719140016. This stands for July (07) 19, (19), 2 p.m. (1400), 2016 (16).

1. At the prompt, type date [numerical], with [numerical] being the representation you figured out. In my example, I typed date 0719140016. Then press Return.

The date should be set. You can check the date again by typing date at the prompt. You can now run the installer.

In this article, I’m going to show you how to fix Erase Process Has Failed during partitioning macOS High Sierra hard drive on Disk Utility. You might have experienced this issue on the later version of macOS (macOS Sierra, Mac OS X El Capitan, Mavericks, Yosemite”. I’m not really 100% sure that why this error occurs sometimes. In some cases, it’s because of the disk scheme and format. In this guide, I’m going to show you two methods that really help you to sort out this frustrating problem.

Related: Fix erase process has failed while erasing the disk

Fixed Erase Process Has Failed Click Done to Continue

This error occurs differently for the people but the solution is almost the same. This guide is going to assist you to figure out this matter.

• Erasing “Untitled 3” and creating “Untitled 3”
• Erase process has failed. Click Done to Continue
• Erase process has failed couldn’t unmount disk
• Erase process failed. “press say to continue

Method 1: Erase a Volume

You see this error message when you want to erase a partition on Disk Utility. If you want to fix it then navigate to your windows operating system and open Disk Management. Create a new volume and choose the File System “exFat“. Check the step by step guide on how to create a new volume on Windows 10. Once the partition has been created, boot into the macOS High Sierra Bootable USB installer. Or if you are trying to build a Hackintosh and having this problem then boot via USB installer.

Press Flail To Fail Mac Os 7

On the Disk Utility window select the partition you’ve created on Windows then click on the Erase tab. As a name, choose any name for the volume you want and as a format select “MacOS Extended Journaled“. Select the scheme “GUID Partition Map” and click on the Erase button.

macOS High Sierra Disk Utility

If this solution doesn’t work for you or even you run the Windows operating system and you’re on an actual Macintosh environment so follow the 2nd method that I’m pretty sure will ease you.

Method 2: Erase the Whole Drive

Press Flail To Fail Mac Os 10 15 7

If the first method didn’t work for you, just backup or transfer all your data from the target drive to save a place like an external HDD. Once you’re done, follow the step below.

Step #1. Click on the small down arrow at the top-left corner of the Disk Utility window and select Show All Devices.

Show All Drives

Step #2. Select the main hard drive, not the volume then click on the Erase tab. A small window will appear now. As a name type any name you want and as format select Mac OS Extended Journaled, as a scheme select GUID Partition Map. Click the Erase button and wait for a while.

As you can see the screenshot down below has formatted successfully without any issue.

Press Flail To Fail Mac Os Sierra

Mounting Disk is Successfully Done

Video Tutorial:

Conclusion

In this guide, we’ve covered some tips and tricks Fixed Erase Process Has Failed, Click Done to Continue on macOS High Sierra or latest version of Mac Operating system on Disk Utility Window. Again, if you’ve got any kind of issue on this topic or you know another method please let us know in the comment section down below this post. We’ll be so happy to hear any kind of feedback from you guys.