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Mac os x boot from usb option key

That requires a very different process. Fast hardware is also important.


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This means USB 3, and either a flash drive with fast read and write speeds, or a solid state drive instead of a hard drive. You will notice a difference if your hardware is not fast enough.

How to Use OS X Boot Options to Troubleshoot Your Mac

If this happens, there is a solution. We'll walk you through this alternative method for installing macOS. This requires you to use the Terminal app. First up, you need to format your drive. Connect it to your computer and launch Disk Utility.

How to Boot a Mac from USB Drive (with Pictures) - wikiHow

Eject the volume by clicking the Eject button alongside it. Now select the device name. Go to Erase and type a name for the drive. Now click Erase.

How to Boot any Mac into a boot device with Windows keyboard

Remember that this will wipe everything on your drive. Now download the version of macOS you want to use. Double-click this to get started. Click through the license agreement.

Why Boot macOS From USB?

Click Show All Disks and select your external drive. All the necessary files will copy over to your drive first, which might take up to 10 minutes. Open the Terminal app, which is in the Utilities folder of your Applications folder. If you want to remove this additional protection but keep your firmware password: Open the Terminal app, which is in the Utilities folder of your Applications folder.

Type the administrator password for your user account, then press Return. Type your firmware password, then press Return. Restart your Mac.


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  • How to start up your Mac from a bootable CD/DVD, USB thumb drive or external storage device;
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Yes No. Character limit: Maximum character limit is Start a Discussion in Apple Support Communities. Ask other users about this article. The machine will start to boot from the USB drive.

Requirements

Here is how:. If you see a message prompts that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility, and then allow your Mac to use an external startup disk.

How to Boot a Mac from a Bootable USB Drive

Your Mac starts up from macOS Recovery. Requirement Starting up your Mac from an external disk requires the following: Intel-based Mac. Step 2: Click the locked icon and then enter your administrator password.