![]() Still in the Terminal window, type /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/XXXXX but replace XXXXX with the name of the USB drive you intend to use as a bootable installer.Drag the createinstallmedia file into the Terminal window.Navigate to Contents -> Resources within the installer package. ![]() Next, open a Finder window, navigate to your Applications folder, right-click (or Ctrl-click) on the macOS 10.15 installer, and select Show Package Contents from the contextual dropdown menu.At the Terminal command prompt, type sudo followed by a space.Launch the Terminal app (found in Applications/Utilities/Terminal).Once the download is complete, close the installer window by selecting the Quit Install macOS option in the menu bar or using the keyboard shortcut Command (⌘) + Q.Download macOS Catalina from the Mac App Store.How to Perform a Clean Install of macOS Catalina Look just below the OS X version number in the Overview tab – if the Mac model name is the same or a later model year than the one shown in the compatibility list above, your Mac is compatible with macOS Catalina. To check if your Mac is compatible, open the Apple () menu in the upper left corner of your Mac's screen and select About This Mac. The full list of compatible Mac models is as follows: MacOS Catalina is a major update that introduces a range of new features and changes including cross-platform app support for third-party apps, no more iTunes, iPad as a second screen functionality, Screen Time, and more.Įvery Mac that can run macOS Mojave will run macOS Catalina, with the exception of the mid-2010 and mid-2012 Mac Pro models. To follow the steps in this article, you'll need an empty 16GB or larger USB thumb drive (USB-C or USB-A, depending on your Mac) and an hour or two of downtime while the installation procedure completes.Īlso, be sure to perform a full backup of your Mac beforehand using Time Machine, so that you can restore your original system from the Recovery partition if something goes wrong. Performing a clean install can also remove annoying quirks and strange behaviors that your Mac may have inherited over time, and often helps to reclaim disk space caused by junk files left by third-party apps. Requires using Migration Assistant while logged in to your PC as an administrator.This article guides you through the process of performing a clean installation of macOS 10.15 Catalina using the bootable USB drive method, rather than upgrading your Mac using Apple's standard installation package, which retains existing user data and any user-installed apps.Ĭreating a bootable USB drive provides you with a convenient way to install a fresh copy of macOS Catalina on multiple Macs. Moved to the Shared folder of your home folder: Non-system files and documents from the system disk (typically the C drive) and other available disks.And photos, which you can add to the Photos app manually, or let Photos search your Mac for photos to import. Moved to your home folder: Documents and other files from your home directory.If the Mac is using macOS Ventura, known Wi-Fi networks are also moved. Moved to System Settings or System Preferences: Custom desktop pictures, language settings, and location settings.Moved to Safari: Homepage and bookmarks from Chrome, Edge, Firefox, Internet Explorer, and Safari.Moved to the Music app, Podcasts app, Books app, and TV app, respectively: Music, podcasts, audiobooks, and movies/TV shows.Requires migrating to a Mac with macOS Ventura. Moved to the Reminders app: Tasks from Outlook.Moved to the Calendar app: Appointments from Calendar (Windows 10 or later) and Outlook. ![]() Moved to the Contacts app: Contacts from People (Windows 10 or later), Outlook, and the Contacts folder in your home directory.Moved to the Mail app on Mac: Email and email settings from Outlook and Windows Mail.If you need to transfer data from another Windows user account, log in to that account on your PC, then repeat the steps in this article. It’s important to do this before you sync or play content downloaded from the iTunes Store. Authorize your Mac for iTunes Store purchases.The account uses the same name and password as the account on your PC. After Migration Assistant is done, quit Migration Assistant on both computers, then log in to the migrated account on your Mac to see its files. ![]() You might want to start in the evening and allow migration to complete overnight. Click Continue to start the transfer. Large transfers might need hours to complete, and might seem to pause occasionally. You might need to scroll down to see the complete list. When ready, select the information to transfer.
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