Advertisement As you may know, you can reinstall macOS on your computer via the internet recovery. 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.
Let’s see how to do this. Choosing a USB Flash Drive for Installing Mac USB flash drives are cheaper than ever, so you won’t have to spend much for this task. However, make sure to buy a name-brand flash drive (like SanDisk, Kingston, or PNY) from a reputable store. Stay away from super-cheap drives with suspiciously high storage on sites like eBay. These drives have their firmware hacked to report a false size to your operating system.
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. Also, check to see what ports you have on your Mac. The 12″ MacBook has a single USB-C port, while MacBook Pro models from 2016 and later feature USB-C ports exclusively. Fortunately, there are USB-C drives available, or you can use a USB-C to USB-A adapter. It’s best to go with a USB 3.0 drive, with a minimum size of 16GB. The is good overall value for the money; we’ve highlighted for more options.
![Windows Windows](https://static1.squarespace.com/static/524a6c0ce4b03fcb7c689ee2/t/56251bbde4b06bdcb469cd30/1445272511372/source.jpg)
$9.75 Formatting Your USB Flash Drive You can only create a bootable installer for macOS on a Mac. 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. Navigate to Applications Utilities, and open up Disk Utility. You should see your flash drive under the External section in the left pane. After selecting it, click on the Erase button along the top. Choose a friendly name (which you’ll use later), and make sure to choose Mac OS Extended (Journaled) for the format.
![Mac Mac](/uploads/1/2/5/6/125620840/364414026.jpg)
Create a bootable USB Installer with Install Disk Creator and boot from it. Erase the startup disk and install macOS onto it. Boot up from this newly created startup disk. Note: The Finder’s built-in “Copy” and “Paste” will not work for the following.
Finally, click Erase and you’re done with this step. Downloading the macOS Installer To download the macOS installer, open the App Store and search for your version of macOS.
Click on the Download button if you’re on High Sierra or earlier. MacOS Mojave is slightly different, as it opens up your System Preferences to download the installer. This is because one of is a new way of installing updates.
How do create bootable dvd of OS’s I’m using High Sierra OS but all video of how to seem to be for older machine not same disc utility. I need do all 8 OS and use machine high Sierra to create I want to archive them in case I ever need them or buy old machine and do it up even restore machines for friends. I’ve tried just burn when you boot it up it fails so I’m guessing that way won’t work. I would be really grateful if someone could help or give me guide/video of how to just case anything ever went wrong and avoid regret of not backing them up. So got advised to use this But it’s not working I’m getting error.
Can anyone help me figure out how do or what to change. I have two ssd one has my operating system and app and my other which replaced my opitical drive has my user profile so all my files go on that. Post Merged, Mar 10, 2018 -I then tried it on my other half Mac which set up by factory default but this came up. Can anyone shed some light on what I’m doing wrong.
Why don't you try this: First, use a 'dual layer' DVD. The capacity on these is 8gb, not 4. Use BootBuddy (as described above) to create the USB flashdrive. Once done, mount the flashdrive in the finder (DON'T boot from it, just mount it on the desktop) 3. Open disk utility, and choose to create a 'dmg' file from the flashdrive icon. Put it on the desktop within 'easy reach'.
When that's done, eject the flashdrive. Assuming you have a DVD burner connected and powered on, RIGHT CLICK on the dmg file and see if the finder offers you the option to burn to disc.
If it does, DO IT. If you don't have that option, I would first try the freeware app 'Burn' and see if the dmg file could be burned to disc that way. If that doesn't work, I'd try a commercial app like Toast, and see if Toast could burn the dmg to DVD. Even if you are able to burn the dmg to DVD, not sure what's going to happen when you try to boot from it, and do an install from it.