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Apr 2, 2024 · Mountain Lion 10.8. Lion 10.7. Double-click the .dmg file to open it and see the package (.pkg) file within. Double-click the .pkg file, then follow the onscreen instructions to install the macOS installer into your Applications folder. Open your Applications folder and double-click the macOS installer, named Install [ Version Name ].
Jun 28, 2024 · When the macOS installer opens, follow the onscreen installation instructions. Any other Mac. Shut down or turn off the Mac. Connect the bootable installer to the Mac. This Mac must be compatible with the macOS that you're installing. If it isn't, it might start up to a circle with a line through it. This Mac must be able to connect to the ...
Sep 2, 2021 · For High Sierra, Mojave or Catalina, Open Safari and click on this link, How to get old versions of macOS – Apple Support. Go to Check Compatibility to see if your mac qualifies for the OS upgrade you want. Then go to the Download OS section and click on the OS you want to install. Before upgrading make a full back up of your Mac. Check that ...
May 17, 2020 · Make a bootable back up first on an exterior drive (so you can restore Sierra later if need be) - with some thing like CCC - Carbon Copy Cloner. then Like chrfr says - check the app store or the "Software Update" for the catalina installer - run it and let it do it's thing.
Nov 26, 2023 · Catalina - an upgrade guide. This tip is from a series of tips of upgrading Mac OS X 10.7 Lion, 10.8 Mountain Lion, 10.9 Mavericks, 10.10 Yosemite, 10.11 El Capitan, 10.12 Sierra , 10.13 High Sierra, 10.14 Mojave, 10.15 Catalina, 11.0 Big Sur, 12.0 Monterey, 13.0 Ventura, and 14.0 Sonoma client release.. Server edition forum is over here:
Jul 15, 2020 · Open the “Terminal” application, it’s found in the Utilities folder and you can also launch it from hitting Command+Spacebar typing Terminal and hitting return. Enter the following command at the Terminal command line, assuming “UNTITLED” is the name of the USB flash drive you want to make into the Mac Catalina installer boot disk ...
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Oct 13, 2019 · 3: Installing the MacOS Catalina Upgrade. Anyone can download MacOS Catalina for free from the Mac App Store, or from the Software Updates section on their compatible Mac. Backup the Mac if you haven’t done so already. Go to the Apple menu and choose “System Preferences”, then go to “Software Update”. When “MacOS Catalina” shows ...
