You should see your flash drive under the External section in the left pane. Navigate to Applications > Utilities, and open up Disk Utility. If you're using a flash drive that already has data on it, make sure to back up any important files as you're going to erase everything in a moment. You can only create a bootable installer for macOS on a Mac. The Samsung BAR Plus is good overall value for the money we've highlighted the fastest USB drives you can buy for more options. It's best to go with a USB drive, with a minimum size of 16GB. Fortunately, there are USB-C drives available, or you can use a USB-C to USB-A adapter. The 12' MacBook has a single USB-C port, while MacBook Pro models from and later feature USB-C ports exclusively. Not only will the transfer speeds be painfully slow, but using them may also result in loss of data or even a damaged USB port.Īlso, check to see what ports you have on your Mac. These drives have their firmware hacked to report a false size to your operating system. Stay away from super-cheap drives with suspiciously high storage on sites like eBay. However, make sure to buy a name-brand flash drive (like SanDisk, Kingston, or PNY) from a reputable store. USB flash drives are cheaper than ever, so you won't have to spend much for this task. Choosing a USB Flash Drive for Installing macOS But did you know that you can create a bootable USB drive to install macOS from? This will let you boot your Mac from a different source if it won't work normally, and makes installs on multiple machines easy. As you may know, you can reinstall macOS on your computer via the internet recovery.

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