Older versions of OS X don’t get the newest fixes from Apple. As a result SCS Computing Facilities (SCSCF) is phasing out software support for all computers running macOS 10.11 El Capitan and will end support on October 31, 2019. In keeping with Apple’s release cycle, macOS 10.11 El Capitan is no longer receiving security updates as of August 2018. Utilize the Setup Assistant to Complete the Installation. With the High Sierra installer ready, it’s time to actually install it. High Sierra is available for download from the App Store. Here’s how to upgrade from El Capitan to Sierra. How do I upgrade from El Capitan 10.11 6 to Sierra? You should now see an option to select your USB drive as a startup disk. Immediately press and hold the Option (Alt) key on your keyboard when it starts booting. Power on the system, or restart it if it’s already on. Booting Your Mac From a USB Drive Simply plug your created USB drive into an open USB port on your Mac.
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