Make efi bootable mac. Select your ISO and click "Flash".
Make efi bootable mac Try to boot already without touching the default "boot" file that comes in the EFI partition. I wonder if it still may contain additional support for Macs whose boot ROMs can't be updated, such as adding support to boot from APFS volumes, perhaps. Your USB stick should appear as gold/yellow and labelled ‘EFI Boot’. Step 1 — Find the USB Drive. Background: Recently, a friend got his EFI boot partition overwritten, whereas his main Mac boot partition had remained intact. Turn on your Mac, then immediately press and hold the Option (Alt) key. Connect the USB drive you want to use to your Mac, then open a Terminal window and find the disk number assigned to your USB drive. If you can't boot, come back and change the name of the "boot" file to "boot-default". diskutil list Jul 16, 2018 · Meaning there's no need to create a bootoable EFI partition at all. Dec 20, 2011 · I've used these steps to create Ubuntu installation media for a Dell server configured for EFI boot. If you want to use your USB stick with an Apple Mac, you will need to restart or power-on the Mac with the USB stick inserted while the Option/alt (⌥) key is pressed. it does not matter. Jun 2, 2025 · Shut down or turn off your Mac. Release the Option key when you see a dark screen showing your bootable volumes, including the bootable installer. Dec 14, 2022 · We’ll install a bootable Clonezilla image on the first one, and the second one remains available for storing the images you take or restore with Clonezilla. To actually use it: Plug it into the internet-connected Mac you . Launch Disk Utility; Select View -> Show All Devices; Right-click or select the target device, and choose "Erase". Connect the bootable installer directly to your Mac. Dec 7, 2023 · How to use the bootable installer on a Mac Once you've completed the steps above, you will have a bootable USB macOS installer. Change the name of the "bootx64 or bootx32" file to "boot" according to the architecture of your processor. Select the bootable installer, then click the onscreen arrow or press Return. Choose MS-DOS (FAT), GUID Partition Map; Click "Erase" Once complete, download and run Etcher. Select your ISO and click "Flash". This will launch Apple’s ‘Startup Manager’ which shows bootable devices connected to the machine. eckqnupquiqulpkplfruqivsgcbsohefagonkdavfstlyopuumccrhcdz