If you're using OS X El Capitan v10.11.5 or later and your App Store preferences or Software Update preferences are set to download new updates when available, macOS Big Sur will download conveniently in the background, making it even easier to upgrade. It installs an app named Install Version Name. Open the disk image, then open the.pkg installer inside the disk image. MacOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion Your web browser downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. I find El Capitan to be pretty speedy and quick. My 13' late 2011 has an ssd and 16gb ram, but high Sierra runs bit sluggish. ![]()
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