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9 Janvier 2021
For more than 20 years, Lexar has been trusted as a leading global brand of memory solutions. Our award-winning lineup includes memory cards, USB flash drives, readers, SSDs and storage drives for retail and OEM customers. Flash will be completely removed from all browsers by December 31, 2020, via Windows Update. Group policies are available for enterprise admins and IT pros to change the Flash behavior prior to that date. Companies reliant on Flash for development and playback of content are encouraged to remove the dependency on Adobe Flash prior to December 2020. Using this tool is one of the easiest ways to build an OS X/Mac OS installer in just a few clicks. Then you can install drive or fully re-install the OS on the freshly formatted drive and install in multiple macs without having to re-download the entire installer. Download Diskmaker X. UNetBootin (Windows/Mac). The USB Flash drive must be formatted as exFAT. Insert an 8GB or larger flash drive into a USB port on the Mac In Disk Utility, format the Flash drive as exFAT. Quit Disk Utility after this operation completes. If you have a newer Mac that currently starts up in OS X 10.7 (Lion) or later, you will need to update the DiskWarrior flash drive with the included DiskWarrior Recovery Maker. A DiskWarrior Recovery flash drive updated with DiskWarrior Recovery Maker will have a blue disk icon as shown below.
To troubleshoot an issue with Windows 10 (especially boot-related issues), it can be handy to boot into Windows 10 not installed on a Boot Camp partition. It is relatively straightforward to create a bootable USB Flash drive to boot to the Windows 10 installer and open up a DOS prompt for troubleshooting.
All the preparation is done in macOS on the Mac that is having an issue booting Windows. It is important to use this Mac since it will be used to identify the correct Windows drivers.
The USB Flash drive must be formatted as exFAT.
Open Boot Camp Assistant in the Utilities folder and download the current Windows Support Software from the 'Action' dropdown in the menu bar. Save the Windows Support Software to your desktop or other location. Do not save directly to the USB Flash Drive.
Download the current install media from the Microsoft website. Windows will not be installed, but the install media will give access to the command line tools in Windows. Select the version of Windows that is closest to the version of Windows installed on the Mac (Windows 8, Windows 10). It does not matter what edition of Windows is used, since Windows is not going to be installed.
To create the USB Flash drive, follow these steps:
Once the flash drive has been created, it should look like this:
Mac laptop camera. The $WinPEDriver$ folder is important because it contains the drivers for Windows to boot successfully from the USB flash drive and the hardware on that Mac.

To inject the drivers, the Mac must be booted from the USB flash drive.
If Windows does not boot from the USB flash drive after showing the Windows logo, you may have to run the following command to tell the firmware to boot the Windows installer from the USB flash drive. This has been observed on the late-2014 Mac Mini but may affect other models as well. To set the variable:
sudo nvram InstallWindowsUEFI=1
Insert the USB flash drive if it is not inserted, reboot, and select the EFI volume from the startup selector.
Note: the InstallWindowsUEFI variable is cleared at each reboot, so you will need to set it again if you do not select the USB Flash Drive.
When Windows 10 starts up, it will prompt for installation of Windows 10. To open a DOS window, press fn-Shift-F10 (or just shift-F10) or click Repair Computer->Troubleshoot->Command Prompt (if available).
Once in the command prompt, there are usually 3 drive letters available: X, C, and D.
Within the Windows command prompt, you can run utilities on the Boot Camp partition.
