We re uncertain of other workarounds for grub at this time. Turn on your mac or restart your mac if it s already on.
Use the createinstallmedia command in terminal connect the usb flash drive or other volume that you re using for the bootable installer.
Macbook pro boot from usb command. Press and hold the option key immediately after you see the apple logo. A fully encrypted computer with anonymous browsing ready to use. Leave the usb stick named as untitled.
Insert the usb boot media into a usb slot. Once you open disk utility you ll see your usb drive listed. Power on the system.
Here are the steps to boot mac from the usb flash drive. You ll have to prepare it by going to applications utilities disk utility. Press command r during startup to start your mac from the recovery system.
Insert the usb boot media into an open usb slot. Click on your usb stick then select erase. 1 turn on or restart your mac.
Select the usb drive as a startup disk when the option appears. If your usb thumb drive usb external disk or flash storage contains a usable operating system or a macos installer you can select it at boot time using macos built in feature called startup manager which can be invoked via a simple keystroke. Make the format mac os extended journaled and use guid partition map as your scheme.
Press the power button to turn on your mac or restart your mac if it s already on. Open terminal which is in the utilities folder of your applications folder. Get your privacy back.
Type or paste one of the following commands in terminal. You need an uefi bootable image. Holding that key gives you access to os x s startup manager.
Press and hold the option alt key on the keyboard when the computer starts. When you hear the startup chime press and hold the option key. Plug in your bootable usb device and boot up your 2018 2019 macbook pro from usb hold the command key and you ll see the startup disk screen select the usb and boot it up.
Once the startup manager screen appears release the option key. Caveats notes and disclaimers. For 2018 2019 macbook pro with the secure boot t2 chip see the 2018 macbook pro boot from usb instructions.