This option is quicker in the short-term, but your Mac won’t run as smoothly in the long-term. Unfortunately, all the junk files your Mac has accumulated also remain there. So all your applications, documents, settings, photos, movies, and music stay where they are.
#Mac os upgrade to sierra install
Remember I said you had a couple of options for upgrading? Here they are:Ī regular install places Catalina files on your startup disk over the top of whatever OS you’re currently running. But the best idea is to make a complete bootable clone of your current startup disk on an external drive. If you use Time Machine you can make a backup with that. Upgrading one OS on top of another carries very few risks, but they are not non-existent so be safe now rather than sorry later. Then, backup your MacĪs you will see below, there are a couple of different ways you can upgrade to Catalina, but before you decide, and certainly before you upgrade, you should make a full backup of your current Mac setup. You can either let it decide what to remove or go through its scan results yourself and decide what to trash and what to keep. It’s very quick and easy to use and will get rid of clutter, making your Mac run more smoothly and freeing up tens of gigabytes of disk space. My recommendation, after years of experience upgrading Macs, is that you use CleanMyMac X. Likewise, it’s always a good idea to clear out the clutter before you upgrade. As you can imagine, upgrading your operating system on a junk-filled Mac is rather like putting one layer of wallpaper on top of another - eventually you have to scrape it off and start again. And as you upgrade year after year, you accumulate more and more. That means that all the system junk your Mac has accumulated over the years stays there. When you do a regular upgrade, the installer replaces some files on your Mac with others, but leaves most untouched.
#Mac os upgrade to sierra how to
If your Mac still runs Mojave or an even older macOS version, you'll be amazed by all the new features and improvements in Catalina. So here’s how to upgrade to macOS Catalina. MacOS Catalina was the newest operating system by Apple until macOS Big Sur succeeded it in 2020.
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