Downloading and installing a new OS gives you the opportunity to do some major house cleaning if you so desire. If you feel like you'd like a fresh start with macOS Catalina, you can always opt to do a clean install: Just follow the steps below, even if you've already installed macOS California.
The macOS Catalina installation takes some time so don’t restart ahead of when the setup screen pops up, but based on a multitude of reports, resetting in this way if it gets stuck appears. Jul 17, 2019 Go back to macOS Utilities and choose install macOS, with your startup disk as the location for the install. Once it’s finished, set up your Mac, reinstall applications and restore your settings. My apps are slow or stopped working on macOS Catalina. Okay, you’ve successfully installed macOS 10.15 Catalina.
Make sure you understand the difference between a clean install and a standard install before you get started.
Note: If you are reading this article on the Mac you want to perform the clean install with, switch to another device or print this page before continuing so you can read along as you go.
Step 1: Back up your MacHow Long For The Catalina Install Macos 10
This process will erase whichever OS you're currently using from your hard drive entirely. That means any files, programs, or documents you have will be deleted. To save your files, put them on an external hard drive or a cloud-based program like Dropbox, OneDrive, or iCloud. If you don't save these important files off your computer, you will lose them.
Step 2: Create a bootable drive of macOS Catalina
Before you erase your current operating system, download macOS Catalina from the Mac App Store. You'll need a copy of macOS Catalina to perform a clean install later on. If you don't create a bootable drive for macOS Catalina, you may have to install an older Mac operating system first and then upgrade to macOS Catalina afterward.
Step 3: Erase your hard drive
Step 4: Reinstall a new copy of macOS Catalina
Questions?
Any questions about performing a clean install? Gimp download mac os x. Let us know below in the comments.
How Long For The Catalina Install Macos Windows 7
Updated September 2019: Updated for macOS Catalina's public release.
Ms office 2011 for mac yosemite. Retrieved April 14, 2010. Archived from on April 13, 2010.
macOS CatalinaMain
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These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
![]() Download macOS
Find the appropriate download link in the upgrade instructions for each macOS version:
macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
OS X El Capitan
El Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer. Use the 'createinstallmedia' command in Terminal
* If your Mac is using macOS Sierra or earlier, include the
--applicationpath argument, similar to the way this argument is used in the command for El Capitan.
Use the bootable installer
After creating the bootable installer, follow these steps to use it:
Learn more
For more information about the
createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:
Catalina:
Mojave:
High Sierra:
El Capitan:
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