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How to install macOS Catalina: upgrade or clean installation?

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Published on Oct 05, 2019

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How to install macOS Catalina: upgrade or clean installation?

macOS Catalina is the new Desktop operating system which introduces new features and new native applications. In this article we illustrate the two different methods to update your Mac.

Just like on the iPhone, there are 2 ways to install macOS Catalina: the first is a real update, that is run automatically by the computer, simply by downloading the new operating system from the Mac App Store. In this case, all you have to do is start the download, and follow the procedure on the screen, through the window that opens automatically at the end of the download.

With this procedure, you will not lose any file on your Mac, but you'll go simply to replace the Mojave with Catalina. It's definitely the easiest and also the fastest but there is another which consists in a “clean” installation of Catalina.

The term “clean” means an installation “from scratch“, without carrying with you the legacy of the old system, file, any errors, and so on. It is the type of installation which we recommend to those who work a lot with your Mac, one that doesn't format for a long time, to those who want to be surprised with a renewed power and speed.

The backside of the coin, however, is the need to perform a backup of documents and files that are more important, because at the end of the procedure you will get a Mac “like-new”, without any file, document or image created by you in time. Take then to an external hard drive for backup and a USB stick at least 16GB to use as a boot disk to install Catalina. Once all this is done, please click here to access the complete Guide for a clean install of macOS Catalina by using a USB flash drive.

Remember that Catalina can be installed on the following Mac:

To verify the year of production of your computer, click on the Apple logo that you find in the top Bar, and then click “about this Mac”

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