How do I force my Mac to boot from USB?
Press and hold the “Option” key when you hear the startup sounds—this will bring you to the Startup Manager. Once the Startup Manager appears, you can release the Option key. Startup Manager will then start scanning your device for drives it can boot from, including your USB.
What is the boot key for Mac?
Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet.
How do I reinstall Mac OS from USB?
Reinstall macOS Insert the USB drive and power up the machine. Hold the Option key as you do so, then release the Option key when a dark screen appears displaying your bootable volumes. Select the volume for your bootable USB drive, then click the up arrow or press Return. Your Mac will then reboot.
What is Command +R on Mac?
How to start up from macOS Recovery
|Reinstall the latest macOS that was installed on your Mac (recommended).||Upgrade to the latest macOS that is compatible with your Mac.||Reinstall the macOS that came with your Mac, or the closest version still available.|
How do I get to the boot option on a Mac?
Press the Power button to turn on your Mac (or Restart your Mac if it’s already on). When you hear the startup chime, press and hold the Option key. Holding that key gives you access to OS X’s Startup Manager. Once the Startup Manager screen appears, release the Option key.
How do I make a macOS Sierra boot drive bootable?
The Easy Option: Disk Creator
- Download the macOS Sierra installer and Disk Creator.
- Insert an 8GB (or larger) flash drive.
- Open Disc Creator and click the “Select the OS X Installer” button.
- Find the Sierra installer file.
- Select your flash drive from the drop-down menu.
- Click “Create Installer.”
How do I know if my Mac USB is bootable?
Open Startup Disk in System Preferences. If it shows in the list, it should be bootable. Open Startup Disk in System Preferences. If it shows in the list, it should be bootable.
How do I boot a Mac from a USB?
Apple Boot Support – Boot a Mac from USB. Startup key combinations for Mac when trying to boot from a NinjaStik USB. Press and hold the keys immediately after you turn on your Mac and hear the startup sound. Keep holding until the described behavior occurs. These combinations work with Intel-based Mac computers.
How do I create a bootable USB drive?
Create Bootable Drive: Select the “Create USB bootable drive” option and click on “Create”. A pop-up dialogue will appear that will prompt the user to format the USB drive. Format the Drive: Click on “Format” Now. Recoverit will show you the process of formatting the USB drive and creating a bootable drive.
How do you start up a bootable installer on a Mac?
After creating the bootable installer, follow these steps to use it. Connect the bootable installer to a compatible Mac. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to macOS Recovery .
What causes a Mac to become unbootable from a USB drive?
It usually happens when there is a failed system update, system crash, damaged MBR, or when the drive becomes corrupt. Recoverit Mac Data Recovery tool is the most efficient option to recover all the lost data when Mac becomes unbootable.