How Much Space Is Needed For Macos Catalina

Posted on 25-03-2021 by admin

How Much Space Is Needed To Install Macos Catalina
How Much Disk Space Is Needed For Macos Catalina
How Much Space Is Needed For Macos Catalina Mac
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How Much Space Is Needed For Macos Catalina Island

I’ll admit it: I’ve gotten a little used to working at smaller companies, where there’s no monitoring of company computers, and it’s the Wild West as far as what you can install on them.

How much disk space is needed for macos catalina

The macOS Catalina may take 18.5 GB space on your hard drive, but to operate it properly, you will need more than 20 Gb disk space to clean install Catalina. If you're performing an upgrade install, you need to make sure the startup drive have about 6.5 GB of space to download the macOS Catalina installer and room for the files the installer. If macOS Big Sur doesn't automatically install on your partitioned hard drive (if it installs macOS Catalina instead, for example), you can install it from your System Preferences in About this Mac. After you have macOS Catalina installed, you can follow the instructions to download and install macOS Big Sur. You are running out of storage space and you can't even see why, but right there in macOS Catalina are the tools to show you what's taking up all that room — and help you do something about it.

That’s no longer the case for me. I now work at Auth0, a company with a headcount that’s quickly approaching 800, with unicorn status and Series F funding, and it’s in the security industry. Naturally, there’s a full-fledged security team that monitors company-issued computers.

In my excitement to take the new version of macOS — Big Sur — out for a spin, I’d forgotten that the Security team hasn’t yet approved it for use. They very quickly (and I should add, nicely) contacted me and let me know that I needed to reinstall macOS Catalina as soon as possible.

There are other reasons why you might need to go back to Catalina after installing Big Sur:

How Much Space Is Needed For Macos Catalina

It’s still very new, and very new versions of operating systems always have some set of issues, whose effects can run the gamut from mildly annoying to catastrophic. If you can’t afford to lose time dealing with these issues, you should wait for the updates.
There are reports that the current version can “brick” MacBook Pros from the 2013 / 2014 era. This isn’t a problem if you’re keeping your old 2013 / 2014 machine around as a backup, but more serious if you’re still using it as your main computer (and yes, a 2013 / 2014 Mac is still a perfectly good machine, even for development work).
If you’re a DJ or music producer, Big Sur currently has compatibility problems with some of the hardware and software. If you want to keep DJing, producing, or mixing on your Mac, stay on Catalina for a little bit.

For the benefit of any who need to downgrade, here’s a step-by-step guide to reinstalling Catalina after you’ve installed Big Sur. You’ll need a USB key and the better part of an afternoon.

Step 1: The preliminaries

1a: Start downloading the Catalina installer from the App store

The first thing you’ll need is the macOS Catalina installer.

It’ll take up around 9 gigabytes of space on your hard drive, and the App Store will put in your Applications folder.

Once it’s completely downloaded from the App Store, the installer will start automatically. When this happens, close the installer. You’ll make use of it later.

The installer will take some time to download. Apple’s servers will be busier than usual, as many users are downloading Big Sur and other upgrades.

1b: Back up your files!

In the process of reinstalling Catalina, you’ll need to completely erase your Mac’s hard drive. If you have any files that you can’t live without, this is the time to back them up.

I didn’t have to worry about this, since:

All my work product is either code (which lives on GitHub) or content (which lives on GitHub or Google Docs), and
I’ve been at Auth0 less than a month, and between onboarding and offsites, there just hasn’t been that much of a chance for me to accumulate that many files on my hard drive!

1c: Get a nice fast USB key that stores at least 16 GB

The process will involve booting your Mac from a USB key containing the macOS Catalina installer, so you’ll need a key with enough space. An 8 GB USB key won’t be big enough. Because digital storage is all about powers of 2, the next size up will be 16 GB.

I strongly recommend that you use a USB 3 key, especially one with read speeds of 300 megabits/second or better, such as the Samsung Fit Plus. Doing so will greatly speed up the process. Don’t use a USB key that you got as conference swag — it may have the space, but more often than not, they tend to be slow, because they’re cheap.

If the USB key contains files that you want to keep, back them up. You’re going to erase the key in the next step.

Step 2: Make a bootable USB key containing the macOS Catalina installer

2a: Format the USB key

Plug the USB key into your Mac, then launch Disk Utility.

Select the USB key in Disk Utility’s left column, then click the Erase button:

You’ll be presented with this dialog box:

Enter MyVolume into the Name field, and for Format, select Mac OS Extended (Journaled). Click the Erase button. This will format the USB key with the volume name of MyVolume.

2b: Install the macOS Catalina installer onto the USB key

How Much Space Is Needed To Install Macos Catalina

In Step 1a, you downloaded the macOS Catalina installer and closed it after it started automatically. In this step, you’ll transfer it to your freshly-formatted USB key.

Open a terminal window and paste the following command into it:

<img src='https://cdn-0.idownloadblog.com/wp-content/uploads/2019/10/macOS-Catalina-disk-utility-split-boot-volume-002.jpg' alt='Catalina' title='Catalina' /><ol><li>Restart your Mac and hold down the <strong>⌘</strong> and <strong>R</strong> keys when you see the Apple logo. This puts the computer into <em>recovery mode,</em> which provides many setup options.</li><li>In the menu bar, select <strong>Utilities</strong>, and then select <strong>Startup Security Utility</strong> from the list that appears.</li><li>The Startup Security Utility window will appear:<ol><li>Under the <strong>Secure Boot</strong> section, select <strong>Medium Security</strong>. This will allow you to install Catalina without having to connect to a network.</li><li>Under the <strong>External Boot</strong> section, select <strong>Allow booting from external media</strong>. This will allow you to install Catalina from a USB key or disk drive.</li></ol></li></ol><h2>Step 3: Install macOS Catalina</h2><p>Restart your Mac, and hold down the <strong>Option</strong> key while it restarts. Your Mac will present you with a choice of startup disks.</p><p>Choose the USB key. Your Mac will boot up and you’ll be presented with the macOS Catalina installer screen:</p><p>Go ahead and install Catalina.</p><p>Once Catalina is installed, you can proceed reinstalling your other software.</p><p>Once that’s complete:</p><h2 id='how-much-disk-space-is-needed-for-macos-catalina'>How Much Disk Space Is Needed For Macos Catalina</h2><ul><li><strong>If your Mac’s year is 2017 or earlier,</strong> you’re done installing Catalina. You can now go about reinstalling your software and restoring your backed up files.</li><li><strong>If your Mac’s year is 2018 or later,</strong> you’ll need to restore its original security settings. The process is described in Step 4, below.</li></ul><h2 id='how-much-space-is-needed-for-macos-catalina-mac'>How Much Space Is Needed For Macos Catalina Mac</h2><h2>Step 4: If your Mac is from 2018 or later, restore the original security settings</h2><h2 id='how-much-space-do-you-need-for-macos-catalina'>How Much Space Do You Need For Macos Catalina</h2><p>If your Mac is from 2018 or later, follow these steps to restore the original security settings once Catalina has been installed:</p><h2 id='how-much-space-is-needed-for-macos-catalina-island'>How Much Space Is Needed For Macos Catalina Island</h2><ol><li>Restart your Mac and hold down the <strong>⌘</strong> and <strong>R</strong> keys when you see the Apple logo. This puts the computer into recovery mode, which provides many setup options.</li><li>In the menu bar, select <strong>Utilities</strong>, and then select <strong>Startup Security Utility</strong> from the list that appears.</li><li>The Startup Security Utility window will appear:<ol><li>Under the <strong>Secure Boot</strong> section, select <strong>Full Security</strong>.</li><li>Under the <strong>External Boot</strong> section, select <strong>Disallow booting from external media</strong>.</li></ol></li></ol></p>
				
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