

But if you plan to clean install on a non-startup drive (you have and extra HDD or SSD on your Mac), you don't need the USB. This flash drive is only needed for a clean install on your Mac’s startup drive. Take a 16GB or larger USB flash drive to create a bootable Sierra installer.Quit macOS Sierra Installer app without performing the installation. Once the download completes, it will automatically launch. Download macOS Sierra Installer from the Mac App Store.Then, you should prepare your Mac for the installation: But, if you like an idea of giving your Mac a fresh start with a new macOS and nothing else, a clean install is the right option for you.Īlso, in case you’ve noticed that with time your Mac is running slower, it has unusual startup or shutdown issues and crashes, a clean install may be a good way to get back the speed and fix the problem.įirst of all, make sure that your Mac is able to run MacOS Sierra. It saves all your personal files, apps and user data, while a so-called clean install of Sierra will erase all data on the startup drive and replace it with a clean copy of OS. Note, that getting an upgrade is the easiest way of installing the new macOS.
#Download mac os x sierra on old mac how to
LEARN MORE: How to Clean Install the macOS High Sierra?

Download the Application from the Mac App Store using your Apple ID on any Mac or functional computer running OS X 10.7.5 or later. The full operating system is a free download for anyone who has purchased Mac OS X Snow Leopard, Lion, or Mountain Lion or has a Mac preloaded with OS X Mavericks, Yosemite, El Capitan, or macOS Sierra. Thus, it boosts performance and helps manage. It enables the storage and encryption of a large number of files. The Apple file system is the most significant feature it brought. There are few bells and whistles, but the changes are noticeable and positive. High Sierra emphasizes the already-existing benefits of MacOS previous system, Sierra. It has plenty of new features, and also has the same easy clean install and upgrade flow as did the previous OS. MacOS Sierra is a fantastic update arriving from Apple to make us love our Macs even more.
