Advertisement The Easy Option: Disk Creator The easiest way to create a USB flash installer is with the free program, Disk Creator.

Advertisement Download the macOS Sierra installer and Disk Creator.

If you have any other data on that flash drive, back it up now, because the installer will delete everything on it.

Open Disc Creator and click the Select the OS X Installer button.

Make sure the drive is formatted for OS X Extended (Journaled).

Its best to disconnect any other external hard drives or flash drives so you dont mix them up.

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Type (or copy and paste) this command into Terminal, replacing Untitled with the name of your drive, then press Enter: sudo ApplicationsInstall macOS Sierra.appContentsResourcescreateinstallmedia --volume VolumesUntitled --applicationpath ApplicationsInstall macOS Sierra.app --nointeraction say Done Type in your password when prompted and press Enter.

Let the command line do its work and dont interrupt it until you see the final line that says Done.

Advertisement When its done, insert your USB drive into any Mac, then launch the installer by holding down the Option key when you boot up your computer.

Thorin Klosowski Posts Twitter Share This Story Get our newsletter Subscribe More from Lifehacker 20 Things to Watch Instead of the Presidential Debate What to Do If You Get Turned Away at the Polls How to Transform Your Life Through Leisure, With Writers John Fitch and Max Frenzel The Best Ways to Teach Yourself to Code DISCUSSION greenamerican 92016 4:07PM Curious about using a thumb drive to upgrade.

Make Bootable Usb 207 Download It From

Is that possible Somehow lately I cant seem to upgrade w a USB without it saying to download it from the Apple Store instead.

Why cant I just use an OSX installation discdrive Its not like they are concerned about piracy as it is free.

Sometimes I even have to get the entire credit card information if they havent purchased anything in a long time.

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