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#DOWNLOAD MAC OS HIGH SIERRA USB HOW TO#
#DOWNLOAD MAC OS HIGH SIERRA USB INSTALL#
#DOWNLOAD MAC OS HIGH SIERRA USB UPDATE#

Here’s how to set it up.Īpple has a website where beta software is made available at beta/ and you can sign up and sign in. So I now have macOS Sierra running on the internal drive, but have the option to boot from the external drive running macOS High Sierra. I plugged in an external USB disk drive and installed High Sierra on that instead of the MacBook’s internal drive.

It would be nice to have spare Macs, but most people do not. If you two or three iMacs and MacBook, and one isn’t essential, the new OS could be installed directly on the disk. There are two options when installing beta software and one is to use a computer that isn’t important. However, beta software gives you a glimpse of things to come and macOS High Sierra has some exciting features. Although Apple public beta software is usually pretty stable and feature complete, it is still possible for something to go wrong.

#DOWNLOAD MAC OS HIGH SIERRA USB INSTALL#

Install it on a USB drive to leave your Mac running macOS Sierra.īeta software may or may contain bugs, may have unfinished features, may have features not yet included, and included features may be left out of the final version.įor these reasons you might not want to put beta software on an iMac or MacBook that you rely on for everyday work.

#DOWNLOAD MAC OS HIGH SIERRA USB UPDATE#

Then, just reboot the computer you want to reinstall or upgrade macOS on, hold the Option ( ⌥) key, select the drive you just created, and follow the installation steps.The public beta of macOS High Sierra is available for download and you can test the new and exciting OS update on your Mac.

It might take some time depending on the macOS version and the USB drive that you are using, but once it is complete, your new installer USB will be ready.

Confirm that you are okay with all the data on the flash drive being erasedĪfter that, the process will begin.

Also, remember to rename macOS\ Installer to whatever the actual name of your USB volume is. This is important because otherwise, the createinstallmedia application will interpret everything after the space character as a new command. Remember that all spaces in the file name and the path (including the name of the USB drive's volume) need to have a backslash before them, like this: \.

Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/macOS\ Installer -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.appįor OS X Yosemite and installers for other older versions of the operating system, use the same command as for OS X El Capitan, but replace all instances of Install\ OS\ X\ El\ Capitan with Install\ OS\ X\ Yosemite, or whatever the name of the OS X installer application is. Sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/macOS\ Installer -applicationpath /Applications/Install\ macOS\ Sierra.app Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/macOS\ Installer To copy the installation files to the USB drive and to make it bootable, first, you will need to copy the command that you will use, which will be different depending on your macOS version. With that, you now have all the pieces required for creating a macOS installer USB. You can either just download the latest version of macOS High Sierra, or, if you've downloaded older versions before, find previous versions of macOS, which would be listed and available for download under the 'Purchased' tab in the Mac App Store. Next, you need to download a macOS installer from the Mac App Store.

Select Mac OS Extended (Journaled) as the file system, and choose GUID Partition Map if asked.

Enter a catch name, something like "macOS Installer".

Once you have your USB drive, you need to wipe it, which can be done with just a few steps. It is also better to use a USB 3.0 flash drive, as both the process of creating the installer USB and installing macOS from it will be faster that way. For macOS High Sierra, Apple recommends that you use a USB drive with at least 12GB of storage. The first thing you need is a flash drive, of course.