The clean install of macOS Catalina goes through a few steps: backing up the computer, downloading Catalina, and restoring data. Let’s see how that goes. Perform a Backup. Just because you opted for a clean install of the macOS 10.15 Catalina doesn’t mean that you don’t need any of your data.
Once you finish setting up setvars EFI utility, you're ready to install macOS Big Sur on your Mac Pro. Start your Mac Pro and while restarting, hold down the option key and boot from 'Install macOS Big Sur'. The installer will load in a while. When at installation screen, select your preferred language and continue 3.
Every Mac that can run macOS Mojave will run macOS Catalina, with the exception of the mid-2010 and mid-2012 Mac Pro models. The full list of compatible Mac models is as follows: The full list of.

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Whether iMovie works better on Catalina vs. Mojave is a matter of opinion. I run Mojave and iMovie runs great with no problems. I haven’t used Catalina so can’t compare from personal experience. From the posts on this forum it appears that iMovie doesn’t run any better on Catalina. Catalina is a 64 bit operating system whereas Mojave is 32 bit. Therefore your 32 bit applications won’t run on Catalina. Also certain legacy media won’t play on it. Upgrading to Catalina will automatically upgrade your Photos app to Photos 5. Photos 5 substantially reoganized Photos 4. There have been many frustrating issues reported re Photos 5.

Download Files: Written Guide: listdiskutil moun.

So, the above considerations would be pertinent re your decision as to whether or not to upgrade. If you upgrade you first should convert to a modern format whatever legacy media that you may have on your Mac.

Perhaps someone will chime in here who has used both operating systems with iMovie.

— Rich

Aug 8, 2021 10:26 PM

Apple’s latest macOS, Catalina, has just been released to the public last October 7, 2019 and you can now install it on your Mac, as long as your device meets the hardware requirements. First revealed during the WWDC 2019 conference in San Jose, California, macOS Catalina introduces some new exciting features and functionalities.

As we say goodbye to iTunes, macOS Catalina brings in new apps and features to the table, including Apple Music, Podcasts Books, and TV. Another major feature is Sidecar, which can turn your iPad into another display. For ordinary users, this means getting a secondary display for free. For developers, on the other hand, this secondary screen can be used as a drawing tablet using supported apps.

With the release of macOS Catalina 10.15, a lot of Mac users are enthusiastic to install the newest Mac operating system. Just like the previous versions of macOS, some were able to upgrade without a hitch, but several users encountered various issues during downloading and installation of the update.

Some users experienced slow downloading of the update, while others got error messages when installing Catalina, including:

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Storage system verify or repair failed
This copy of the Install application can’t be verified. It may have been corrupted or tampered with during downloading.
An error occurred while preparing the installation. Try running again.
Copy of install macOS application is damaged and can’t be used to install macOS.
There is not enough free space on the selected volume.

This guide will give you a detailed rundown of the most common macOS Catalina installation and update errors encountered by Mac users when upgrading or installing macOS Catalina, along with the instructions on how to deal with these hiccups.

Why macOS Catalina Won’t Install

Various problems can occur during the installation of macOS Catalina. If the installation won’t start, seems to freeze midway , or never seems to complete, then it means that there must be something wrong somewhere.

The first main reason why users can’t install macOS Catalina is compatibility problem. If your Mac doesn’t support macOS Catalina, you won’t be able to proceed with the installation. You need a fairly recent Mac to be able to run macOS Catalina. Here are the Mac models that support the newest macOS:

MacBook (2015) and later
MacBook Air (2012) and later
MacBook Pro (2012) and later
Mac Mini (2012) and later
iMac (2012) and later
iMac Pro (2017) and later
Mac Pro (2013) and later

If your device is not on this list, then you’re sure to run into problems when installing Catalina.

Another thing you need to check before installation is your available storage space. You will need around 6.5 GB just to download the installer. Once you’ve downloaded it, the amount of space you will need during the installation depends on whether you’re doing a clean install or an upgrade.

A clean install will eat up around 20 GB of storage. On top of that, you have to make room for apps, user data, and user updates. An upgrade install, on the other hand, will only take up 6.5 GB of space for the installer, plus some installation files that the installer will copy to your startup drive.

If you’re tight on storage space, you should consider removing unneeded apps and files on your Mac. You can uninstall the apps one by one, and delete cache files and data using Mac repair app. Make sure you have at least 25 GB of free space to be able to install macOS Catalina successfully.

Aside from compatibility issues and insufficient storage, poor internet connection, incomplete or corrupted installation files, hard disk problems, and faulty software can also cause issues during the installation of macOS Catalina.

Installation Checklist for macOS Catalina

Before proceeding with the installation, it is necessary to spend some time ticking off the checklist below. These steps will not only prevent errors from happening, but also ensure that your data remains safe in case something goes wrong.

Back up your Mac, especially your iTunes media library since Catalina will no longer have iTunes.
Take note of the 32-bit apps on your Mac . You will need to update them to the 64-bit version after upgrading, or find an alternative for them.
Delete old Install macOS files from your Applications folder. These old macOS installation files may cause error during the upgrade.
Remove all external drives and accessories.
Plug in your Mac’s power adapter.
Connect to a stable Wi-Fi network.

Once you’ve completed these steps, you can now proceed with the upgrade.

How to Upgrade to macOS Catalina

The easiest way to download and install macOS Catalina is through the App Store on your Mac. Just open the App Store and search for macOS Catalina. Click the install button to start downloading, then click Continue.

You can also visit the macOS Catalina website and download the installer from there. The installer will be downloaded to the Applications folder on your Mac. Once downloaded, the installer will open by itself. Just follow the onscreen instructions to proceed with the installation. You might be asked to log in using your admin username and password during the process.

As long as your device is compatible with Catalina and you’ve followed the instructions, you’ll be able to successfully install the new macOS on your Mac. But if you encounter any error during the download or installation, refer to our guide below to sort out the issue.

How to Fix Common Download Errors for macOS Catalina

Downloading the installer is the first step of the installation process. The installer takes up 6.5GB of storage, but you will need more space to be able to run the new macOS smoothly. If you have Automatic Updates enabled, the installer might already be downloaded on your device.

If the installer has not yet been downloaded, go to the Apple menu > S

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