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Do you want to Update / Install MacOS Catalina?

This is what you need to know and how you install MacOS Catalina.

Before we get started, showing you how to download and install Apple’s new MacOS Catalina 10.15. Let take a glance at Catalina.

Apple announced Catalina development and release at the June 2019 WWDC. At the September 2019 Apple iPhone 11 event. Apple confirmed the release date to the public macOS Catalina 10.15 for 7th October 2019.

macOS Catalina announcement

Want to know more?

Is it time to update to Catalina?

If you can’t wait to try out and install the new version of Apple’s Operating System. MacOS Catalina then here is a guide to installing it!

Fresh or Upgrade?

When installing Catalina?

Do you upgrade or Start Fresh when I install macOS Catalina?

Find out whats the best option when installing MacOS Catalina.

Fresh (starting again/losing all your data)


Upgrade (keeping all your data and setting). 

Can your Mac Upgrade and Install MacOS Catalina?

First off you need to know if you can run MacOS Catalina. The easiest way to check, if your iMac or MacBook is capable of running MacOS Catalina is simple. 

If you’re currently using Apples MacOS Mojave 10.14 on your iMac or MacBook. Your Apple Mac gives you the option to upgrade to Mojave. 

But you’ve been putting it off. Then by all means your Apple iMac or Macbook will run and install the MacOS Catalina update.

Check your Mac Can Run Catalina

For a more detailed list of what macs meet the requirements. To install MacOS Catalina.

Checklist Before You Upgrade to Catalina!

A little bit of advice from me to you! Before you download and install macOS Catalina. To ensure you hit no bumps in the road. This guide will help your Upgrade or Install goes as Smoothly as Possible.

You don’t want any sudden disasters. Do you?

  • Make Backups
  • Make sure you know your Apple ID
  • Check you have enough Storage
  • Update your Apps and Programs
  • Make sure your Current MacOS is up to date!

Make backups

It’s imperative. Make sure you have backups and the more, the better.

There is even the slightest chance something goes wrong. You need to be sure that you have all the bays covered. So you don’t lose your data. 

You will be kicking yourself if you lose some valuable photos or documents. 

So ensuring you don’t lose anything. Means make a backup then another one and another one. You can never be too sure.

I always make sure I have three backups of my data.

  • 1) iCloud Backup
  • 2) Time Machine Backup
  • 3) Manual Backup to External HDD or USB. (copy files, photo and documents)
Using Time machine is simple and effective for full system backups

Make sure you know your Apple ID. 

Apple likes its user to use an Apple ID for all its Devices although it’s not a necessity. You will need an AppleID to update/upgrade to MacOS Catalina. 

Even to download any app. Plus the icloud backup or icloud Drive comes in useful for storing your Photos or document.

Make sure before you download and Upgrade to macOS Catalina that you have an iCloud. AND you know the password 100%. 

Also actually log in and check its correct. 

“iv had so many jobs for clients in the past, and they’ve had a password written down. in a notepad and that wasn’t even the correct password.”


Also, check if your iCloud’s linked to another device like an iPhone or Ipad. In case you get authentication when resigning in!


Make sure you know your Apple ID and CHECK IT!

Check you have enough free space. 

The Apple MacOS Catalina is about 6.5GB. That’s Huge. Make sure you have that available! 

Apple recommends before doing the MacOS Catalina Upgrade. That you have 20GB of FREE storage space, this might be true. 

But personally, when I do updates for clients. I always make sure several factors in regards to free space.

These are;

  • Make sure you have the recommended free space PLUS 10% of the hard disk space. Apple devices rely heavily on the hard disk, caching. So iv always made sure that my 10% rule applies
  • Make sure your desktop is clean. If it’s not. Create a new folder. Place everything into a folder from your desktop. Then store this somewhere else other than your desktop.
  • Empty Trash
  • Delete Unwanted Downloads from the Download Folder!
  • Use a Cleanup Utility like CCleaner Mac. (To clear unnecessary and unwanted files. from the system).
  • Run Disk Utility Post Cleanup! (making sure everything is just right)

I would recommend doing the above before creating a backup.

MacOS 10.14 Storage

Update your Current Verison of MacOS

I would always update the current version of your operating system. Before upgrading to a new version. 

Updates can contain hardware and firmware updates for your device. 

The updates will ensure that the install of MacOS Catalina update goes smooth.

  • Click "Apple logo (top left) >
  • Select "About this Mac >
  • Choose " Software Update

Update your apps. 

One of the significant differences with MacOS Catalina is that its solely a 64Bit operating system, which means that Apple is turning off and stopping support for all 32Bit apps.

So that if you have old 32bit software, it will not work. For instance, Microsoft office 11 and older is 32bit. 

Don’t worry if you don’t know what apps are 32bit or 64bit. Catalina will notify you during the install of Catalina. Plus more developers have 64bit alternatives or Updates to their respective programs. 

macOS Catalina Compatibility Checker

Now your Ready.

To Install macOS Catalina.

After you’ve read the article and completed all our advised preparations, you’re ready to download and install MacOS Catalina.

BEWARE: Apple has made installing MacOS Catalina EASY!

Download macOS Catalina 10.15

If you’re using macOS Mojave, it’s so simple. 

Get macOS Catalina via Software Update


Choose Apple menu  > System Preferences, then click Software Update.

Or you could use this link to open the macOS Catalina page. 

From on the App Store: Get macOS Catalina.
Then click the Get button or iCloud download icon and let it begin.

Catalina upgrade from Mojave

Begin Catalina Installation.

After downloading MacOS Cata, the installer opens automatically.

Now click Continue. Then follow the onscreen instructions. 

You might find it most comfortable to begin installation before bed in the evening. So when you wake, the installation of MacOS Catalina will be complete. Overnight is often the most time-efficient way to install an update as it can take some time.


MacOS installer asks for permission to install a helper tool. 

Enter the administrator name and password that you use to log in to your Mac, then click Add Helper. Usually the administrator name. Is already entered if not enter your user profile name.


Allow the installation to complete

NOTE: If you’re using a MacBook Air or MacBook pro. 

Please let installation to complete without putting your MacBook. Sleep by closing its lid. 

Your Mac will restart several times. It will show a progress bar and an estimated time of completion. Don’t worry if you see a blank screen several times. It’s usually the mac firmware updates. It’s normal.

When the install completes, you will be greeted by a screen telling you the installation is complete. Follow the onscreen instructions after that.


Stay up to date.

Post installing macOS Catalina. Catalina will tell you when updates to macOS Catalina are available. 

You can also manually check for updates by:

Choose Apple menu  > System Preferences, then click Software Update.


Want us to Upgrade you to macOS Catalina?

If you want to upgrade to macOS Catalina. But not confident about doing it your self. Then let us do it for you. Why not visit our Apple Repairs page

Visit Apple Repairs

If you’re holding off upgrading or installing macOS Catalina for a while. But its something your thinking about doing. But you’re worried about the data on your iMac or MacBook. Why not visit our iMac or MacBook page. Book an appointment and let us give you the best advice we can on how to move forward.

Do you need an Apple iMac Repair

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