how to clean install mac os sierra without usb

#How to clean install mac os sierra without usb how to
#How to clean install mac os sierra without usb upgrade
#How to clean install mac os sierra without usb code

Keep holding Alt/Option until you see the boot menu appear, select your USB installer, and press Return to boot into the Sierra install environment from your USB drive.How to do a clean install of macOS Sierra Then, simply power on your Mac while holding the Alt/Option key on your keyboard. To boot from your macOS Sierra USB Installer, first shut down your Mac and connect the USB drive. The second method, and the one that is more useful with USB installers, is to perform a clean install by booting to the Sierra USB Installer and either installing macOS Sierra from scratch on a new drive, wiping your existing drive, or installing to a new partition.

#How to clean install mac os sierra without usb upgrade

This lets you upgrade multiple Macs without having to download the Sierra installer from the Mac App Store each time. Just boot into OS X on a Sierra-compatible Mac, plug in your USB drive, open the drive in Finder, and double click the macOS Sierra installer app file. First, you can use it to upgrade existing OS X installations to Sierra, similarly to how the Sierra install application downloaded from the Mac App Store works. Once you have your macOS Sierra USB Installer ready, you can use it to install the operating system in one of two ways. Step 4: Installing macOS Sierra from the USB Drive You can now quit Terminal, eject your USB drive, and proceed to install macOS Sierra on any compatible Mac. When the macOS Sierra USB installer is ready, Terminal will print “Done” and then return you to your user account command line. Just make sure not to interrupt the process. Depending on the speed of your USB drive, this process can take between 2 and 15 minutes. As long as the names of your Sierra installation app and USB drive match those mentioned above, Terminal will use the createinstallmedia command to copy the macOS Sierra installation files to your USB drive and make it bootable.

This is a sudo command, so you’ll need to enter your Mac’s admin password. Launch Terminal and then copy and paste the following command: sudo /Applications/Install 10.12 Developer Preview.app/Contents/Resources/createinstallmedia – volume /Volumes/macOSInstall – applicationpath /Applications/Install 10.12 Developer Preview.app – nointeraction

Step 3: Create the macOS Sierra USB Installer This name is simply to ensure compatibility with the installation commands below, and the name of the drive will be changed after the installer setup is complete. Find the USB drive listed on the left side of the window, click to select it, and then click Erase in the toolbar.Įnsure that “Scheme” is set to GUID Partition Map, “Format” is set to OS X Extended (Journaled), and then finally name the drive macOSInstall. Plug your USB drive into your Mac and launch the Disk Utility app. Make sure that you don’t have any important files on this drive as we will be wiping the drive before creating the installer. Next, grab a USB 2.0 or USB 3.0 drive that is at least 8GB in size. As of the date of this tip, the name of the macOS Sierra Developer Preview installer is Install 10.12 Developer Preview.app. Now check your Applications folder to verify that you have the Developer Preview installer, as the instructions for creating the USB installer are dependent on the name of the installer application. Quit it by pressing Command-Q on your keyboard. Once you have downloaded macOS Sierra from the Mac App Store, the upgrade installer app will automatically launch. It is still possible to obtain and install macOS Sierra if you are not a registered developer or beta tester, but be wary of using installers obtained from sources other than Apple, as using them is a violation of Apple’s licensing agreements and they may have been modified to contain malware.

#How to clean install mac os sierra without usb code

Registered developers will receive a Mac App Store redemption code for macOS Sierra via the Apple Developer portal. To create a macOS Sierra USB Installer, you first need to download the operating system from the Mac App Store. Step 1: Download the macOS Sierra Installer from the Mac App Store Note that these instructions will vary for the Public Beta and eventual final version of macOS Sierra, and we will provide updated instructions for these versions as they are released.

#How to clean install mac os sierra without usb how to

Here’s how to create a macOS Sierra USB Installer for the Developer Preview. While Apple makes installing macOS Sierra easy via the Mac App Store, some users prefer to create their own USB installers that can be used to upgrade multiple Macs or install macOS from scratch on an empty drive. The macOS Sierra Developer Preview is here and will soon be followed up with a Public Beta later this summer. How to Create a macOS Sierra USB Installer for the Developer Preview