USB Flash Drives are also a great option for saving information and share it with others. When you have many things to save and share but you have a limited number of USB Flash Drives, you will need to backup the information and restore it when needed. This is where the Microsoft USB Flash Drive Manager application can help you. However, for those who’ve been used to live “in the cloud” (aka, using cloud storage or services for all kind of files), you probably won’t need a physical disk drive at all. Buying a Flash Drive for Mac: What to Consider in 2020? When you’re storing files, space is everything.
Do not use a USB port on a hub, external monitor or keyboard. Note: Some USB-C adapters are not suited for startup from data storage devices.
After a few seconds, the Startup Manager should appear as shown below. If you see the Apple logo, it’s possible that you didn’t hold Option early enough. Restart and try again.
A green DiskWarrior Recovery disk icon indicates that the DiskWarrior flash drive contains the DiskWarrior Recovery as it shipped from Alsoft. This disk can boot any 64-Bit Intel Mac that currently starts up in Mac OS X 10.4 (Tiger), 10.5 (Leopard) or 10.6 (Snow Leopard).
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. Alternatively, you can start up from your Mac's built-in macOS Recovery.
If the icon of the DiskWarrior Recovery disk is green then DiskWarrior will launch automatically after the Mac is started up. If the icon of the DiskWarrior Recovery disk is blue then you will be presented with a window from which you will double-click DiskWarrior to launch it.
Open the DiskWarrior manual from the Help menu for further instructions on repairing and recovering.
When a disk is encrypted, the Mount/Unmount tool changes to an Unlock tool. Select the encrypted disk in the pop-up menu and click the Unlock tool. You'll be prompted to enter the password to unlock the disk. You'll need to update the original DiskWarrior Flash drive with DiskWarrior Recovery Maker to add support for FileVault 2.
Note: The “Startup Disk” of macOS Catalina (10.15), macOS Mojave (10.14), and macOS 10.13 High Sierra with SSDs (Solid State Drives) cannot be rebuilt with DiskWarrior as they are automatically pre-loaded with Apple File System (APFS).