Enter it, and the command will create a bootable Sierra installer on the USB drive. You should be prompted for your administrator password.Now, ensure the USB drive is the only disk named "Untitled" connected to your Mac, and then paste the following command into the Terminal window, and press Enter: sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ Sierra.app -nointeraction.Once your thumb drive is formatted and the macOS installation package has finished downloading, open up Terminal (found in Applications/Utilities). Name the USB drive "Untitled" if it isn't already, choose the Format "OS X Extended (Journaled)", and click "Erase".Open Disk Utility (found in the Applications/Utilities folder), select the thumb drive in the sidebar and click the "Erase" button.Once it has downloaded, follow these steps to create a USB bootable installer. Create a Bootable Installerĭownload the macOS Sierra installation package from the Mac App Store. Lastly, de-authorize any services on your Mac, including your iTunes account (iTunes menu > Store > Deauthorize this Computer), since these are usually limited to a set number of systems. It's also worth screen-grabbing or noting down any custom preferences, settings, Wi-Fi passwords, and app-specific profiles you use. If necessary, add details of download locations for any non-Mac App Store apps you use, append any serial numbers you might need, and save the text document to an external drive.īe sure to allow any cloud services you use to complete synchronization before continuing.Now open up TextEdit, create a new document, select Format -> Make Plain Text from the menu bar, and press Command+V to paste a list of app names into the document.Open the Applications folder and press Command+A to select all apps in the Finder window, then press Command+C.A screenshot may suffice (Command-Shift-4, then Space to capture the Finder window), but if not, the following steps describe a simple way to create a list of apps. Some users may find it useful to make a note of the contents of their Applications folder for later reference. It's also worth taking a screenshot of your desktop, to serve as a record of how you like things set up. If you want total control of what data gets transferred to the new OS, you can sidestep the Migration Assistant and manually copy any important files and folders on your existing system to an external drive instead. Look just below the OS X version number in the Overview tab – if the Mac model name is the same or a later model year than the one shown in the compatibility list above, your Mac is compatible with Sierra. macOS Sierra supports the following:Īnother way of checking if your Mac is compatible is to open the Apple menu in the upper left corner of your Mac's screen and selecting About This Mac. Compatibility Checkīefore you do anything, check that your Mac is compatible with Apple's new operating system. Alternatively, save a bootable mirror image of your system to an external drive using a clone utility like SuperDuper! ($27.95) or Carbon Copy Cloner ($39.99). That way you can restore your system from the Recovery partition if something goes wrong. You should also perform a full backup of your Mac beforehand using Time Machine. To complete the clean install procedure described below, you'll need an 8GB or larger USB thumb drive and an hour or two to spare. Performing a fresh install can also reclaim lost disk space caused by junk files left by third-party apps, and can generally make your Mac feel a lot snappier, enabling you to relive that feeling of booting it up for the first time. Benefits of a Clean InstallĪ clean install can remove annoying quirks and strange behaviors that your Mac may have inherited over time due to driver upgrades, wonky apps, and messy installation procedures. This tutorial explains how to download macOS Sierra and perform a clean install, which offers several benefits over the automatic upgrade process included in the installation package. It also adds new features to Photos and Messages, and includes Continuity smarts like Universal Clipboard and an Auto Unlock option for Apple Watch owners. The main new feature in macOS Sierra is deep Siri integration, bringing Apple's personal assistant to the Mac for the first time. The OS will come pre-installed on all new Macs once current stock is depleted and is a free download for existing Mac owners. MacOS Sierra is Apple's latest desktop operating system, which succeeds OS X El Capitan and adopts a new name to bring it in line with iOS, watchOS, and tvOS.
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