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MacOS Catalina Support & System Requirements

Mac OS Catalina Support for supported Apple Mac Computer year models for the iMac 2012 and MacBook 2012 computers. Telephone 07800 940756

MacOS Catalina Support. Get professional Apple macOS Catalina support for your 2012 to 2021 iMac, MacBook Air, MacBook Pro computer.

  • Mac OS Catalina Support Telephone Number: 07800 940756
  • Mac OS Catalina Support for iMacs, MacBook, Mac Mini Apple Computers.
  • Get Mac OS Catalina Support with a Mac OS Update from Mac OS Yosemite, or from Mac OS El Capitan.
  • Why is Mac OS Catalina Slow or Slow after a Mac OS Catalina Update?
  • How to Clean Install Mac OS Catalina.
  • How to Upgrade to Mac OS Catalina.

macOS Catalina is the best macOS operating system for the Apple iMac 2012 desktop computer and for Apple MacBook Air, and Apple MacBook Pro Apple computers that can only upgrade to macOS Catalina, macOS Catalina in 2023 is still able to do most of the tasks on the Apple iCloud system. MacOS support from Keith Thomas provides onsite and remote macOS Catalina support for home users, and for Apple Store UK customers.

macOS Catalina was superseded by macOS Big Sur. macOS Big Sur System requirements.

MacOS Catalina Support.

MacOS Catalina Support service by Keith Thomas – Apple Specialist and Apple Mac computer expert.

Get expert help with MacOS Catalina for your 2012 or newer Apple Mac computer.

Same day and same hour Apple Mac OS Catalina Support service.

Keith Thomas provides a same day and a same hour Mac OS Catalina Support service for home Apple Mac computer users, and for Apple Store customers that need professional Apple Mac OS Catalina help and support assistance.

Apple Mac OS Catalina Support Specialists.

Our Apple Mac OS Catalina specialists have over 32 years of Mac OS IT Support skills.

  • Expert iMac and MacBook Air, MacBook Pro Mac OS Catalina support service.
  • Apple Mac OS Yosemite to Mac OS Catalina upgrade assistance.
  • Mac OS El Capitan to Mac OS Catalina upgrade help.
  • Apple Mad OS Sierra and Mac OS High Sierra to Mac OS Catalina support.
  • Mac OS Mojave to Mac OS Catalina support.
  • Apple Mac OS Catalina Technical Support service and assistance.

Mac OS Catalina Technical Support service.

We have Apple Mac computer engineers and Apple Mac computer specialists that provide a same day and a same hour Apple Mac OS Catalina Technical Support service.

Our Apple Mac OS Catalina Technical Support service is open from 09:30 am to 20:30 pm. Mondays to Sundays. 7 days a week service.

Get macOS Catalina Support by Apple Mac computer remote support service.

Expert and professional Apple Mac OS Catalina Support service is available to home computer users, and for Apple Store customers, and also for Curry’s PC World, John Lewis, Peter Jones, and Selfridges and Harrods Apple Retail store customers.

Apple iMac Mac OS Catalina Support.

Do you have a Apple iMac 2012 or newer iMac computer, and you need help with Mac OS Catalina?

Are you having problems with your Apple Mac computer and you need to get Mac OS Catalina Support?

Have you upgraded to MacOS Catalina or you need help with upgrading your Apple Mac computer to Mac OS Catalina?

Our Apple iMac specialists and Apple iMac computer engineers provide a same day and a same hour Apple iMac, Mac OS Catalina IT support service for iMac home users and for Apple retail store iMac computer users.

MacBook Air and MacBook Pro Catalina Support.

Keith Thomas also provides Mac OS Catalina Support service and assistance for Apple MacBook Air, and Apple MacBook Pro computer users.

Ask our Apple Mac computer engineers for help and assistance with MacBook Air and MacBook Pro Mac OS software updates and Mac OS software upgrades service to Mac OS Catalina.

Remote Mac OS Catalina Support service.

  • Did you know that most if not all Apple Mac OS Catalina Technical problems can be resolved by Remote Mac Support service.
  • Our Remote MacOS Catalina service providers a same day and a same hour Apple Mac computer IT support service.
  • Providing expert Mac OS help to both home users and for Apple Store customers.
  • And for Curry’s PC World, and John Lewis, Peter Jones, and Selfridges and Harrods Apple Retail customers.

Apple macOS Catalina Support. Expert help with upgrading, installing and updating MacOS Catalina for 2012 to 2019 Apple Mac computers! macOS training • consultancy • maintenance service.

MacOS Catalina Support for 2012 and newer Apple Mac computers.

  • Keith Thomas provides Apple macOS Catalina Support in the UK for 2012 and newer Apple Mac computer.
  • For home users and for small businesses that need macOS Catalina Support for their Apple Mac computer.
  • Our Apple macOS Catalina Support service is by Remote Mac Support service in the UK.
  • macOS Catalina has now been replaced by macOS Big Sur if you have a 2013 or a 2014 or newer Mac update to Mac OS Big Sur, or Mac OS Monterey.
  • macOS Catalina is still supported with macOS software updates and macOS security updates.

Keith Thomas provides independent macOS Catalina Support service.

Keith Thomas is a Apple Mac computer specialist that provides a same hour and a same day macOS Catalina Support service.

  • macOS Catalina technical support.
  • macOS Catalina computer software repairs.
  • Catalina security updates.
  • macOS Catalina maintenance.
  • Apple macOS computer training service on macOS Catalina.
  • macOS Catalina Remote IT support service.

Ask Keith Thomas questions about macOS Catalina or about how to upgrade to macOS Catalina, or how to troubleshoot a macOS software problem with macOS Catalina. Keith Thomas provides macOS support by remote Mac Support service in the UK.

MacOS Catalina FAQ questions and answers.

Is Apple MacOS Catalina still available from Apple?

Yes. The Apple MacOS Catalina Apple Mac operating system software is still available on the UK Apple Store to download.
Use the official link from Apple to open macOS Catalina from the Apple App Store.

How much memory is needed to run Apple MacOS Catalina at a good speed?

8Gb of memory is suitable for most Apple iMac users that use the pre-installed software on a Apple Mac computer. 16Gb or more memory is often required to boost the performance even further.

How can I speed up the performance of Apple MacOS Catalina?

The best way to improve the performance of Apple MacOS Catalina is to upgrade an Apple Mac computer from a mechanical hard disk to a solid-state storage volume and install more memory from 8Gb to 16Gb.

Does Microsoft Office 2011 for Mac run on Apple MacOS Catalina?

No. Only Microsoft Office for Mac 2019 is fully supported on Apple MacOS Catalina.

Can i upgrade to Apple MacOS Big Sur from MacOS Catalina?

Yes. But only if you have a Apple Mac computer that is 2014 or newer!
macOS Big Sur is now recommended if you have a 2014 or newer Apple Mac computer that meets the macOS Big Sur hardware requirements.
And MacOS Monterey from late 2021 if you have a 2014 or newer Apple Mac computer.

How do i check to see if i have any 32 bit code or 32 bit applications on a Apple Mac computer before upgrading to MacOS Catalina?

The Apple MacOS has a build in software audit tool that can show which 32 bit applications are installed on a Apple Mac computer before upgrading to Apple MacOS Catalina. This is found from the Apple menu, about this Mac/computer, and from the overview tab choose system report.

Can my Apple Mac computer run Catalina?

Most Apple Mac computers manufactured from 2012 to late 2019 can run MacOS Catalina. for Apple Mac computers that are mid 2020 or later can run the update to MacOS Catalina called MacOS Big Sur.

How can i get macOS Catalina Support in the UK?

Keith Thomas provides macOS Catalina support in the UK by onsite and Remote Mac Support service.
Complete the online website contact form for assistance.

Is MacOS Catalina still supported?

MacOS Catalina is still supported by Apple and by Keith Thomas – MacOS El Capitan and earlier versions of MacOS are now not suitable for use online on the internet. Apple recommends that you upgrade the Apple Mac computer to the newest version that is supported. And for the very best Apple Mac computer security and performance use the newest MacOS version, even if you need to buy or purchase a new Apple Mac computer.

How to get Mac OS Catalina Support for your Apple Mac computer?



Why is macOS Catalina slow or very slow?

One of the main reasons for macOS Catalina being slow or very slow is when just after the macOS operating system software has been updated to macOS Catalina from macOS Mojave or from an earlier macOS version, or the storage volume has become slow or very slow. Simply leave the Apple Mac computer on for 24 hours after a macOS update to allow all of the hidden background tasks to complete.

macOS Catalina can be slow or very slow for a few reasons, the main reason why macOS Catalina becomes slow is a Macintosh HD hard disk storage volume that has become, slow, this will make macOS Catalina also slow. Other reasons also include having malware infection on the Apple Mac computer.

Apple MacOS Catalina Support for Slow Apple Macs.

  • Do you need to know why macOS Catalina is slow or very slow?
  • Is your Apple MacOS Catalina Apple Mac computer slow or very slow after you have upgraded to macOS Catalina?
  • Do you need know how to speed up macOS Catalina on your Apple iMac computer or on your Apple MacBook Pro laptop computer?
  • Has macOS Catalina suddenly become slow on your Apple Mac computer?

If your Apple MacOS Catalina operating system is slow or very slow after upgrading to MacOS Catalina there are many reasons why. 

Did you know that by using a SSD solid state drive is one of the best ways to speed up macOS Catalina.

If you have a Apple Mac computer that is 2014 or newer, upgrading to macOS Big Sur can speed up a Apple Mac computer that is running slow on macOS Catalina!

Our Apple Mac computer engineers and Apple Mac computer specialists are able to help with the performance of macOS Catalina. Read our free guide about macOS Catalina and how to improve the speed and performance of macOS Catalina.

Apple MacOS Catalina Information.

  • A new Apple MacOS operating system is available each year, this can affect the performance of your Mac.
  • All Apple Mac computers that are manufactured from 2012 to 2019 can run Mac OS Catalina.
  • 7th October 2019 Apple launched MacOS Catalina to replace MacOS Mojave.
  • The next new release will be late 2021 with MacOS Big Sur.
  • Catalina may not be supported on any 2013 or newer Apple Mac computer once Big Sur released.

For the majority of customers, the Apple MacOS Catalina operating system simply runs at a very good speed.

But this is with an Apple Mac computer that has a SSD Solid state drive!

Did you know that Apple designed macOS Catalina and newer macOS to work much faster on a SSD solid state storage volume!

Why is macOS Catalina slow on my Apple Mac computer?

So, we need to ask why is Apple Mac OS Catalina slow on some Apple Mac computers?

The main reason why macOS Catalina is slow on some 2012 or newer Apple Mac computer, is that the computer has never had any Apple Mac computer maintenance done, or the internal storage volume has so many files, and folders, which is a key factor why a Apple Mac computer that is running macOS Catalina become slow or very slow.

As the older generation of Apple Mac computer become older, a key factor with the speed and performance of MacOS Catalina, is the performance of the storage volume, by design, over time, a 1TB SATA storage volume can become slow or very slow, and the only options are to either format the storage volume, and start again from a new erased MacOS Catalina reinstallation, or to replace the 1TB SATA storage volume with a flash storage volume, or another way would be to use an external flash storage volume as the MacOS startup volume to a USB 3.0 external SSD or even an external USB-C SSD with a USB-A to USB-C lead or adaptor.

Apple MacOS Catalina Memory Requirements.

  • The main reason that the Apple MacOS Catalina is slow or very slow is not enough memory.
  • After the Apple MacOS operating system has been upgraded, often a lack of memory, can cause slow performance.
  • Technically Apple says Apple MacOS Catalina runs on 4Gb memory for a base MacOS installation. 8Gb is better.

Our Apple Mac engineers simply do not agree and 8Gb of memory is recommended, hence all new Macs have 8Gb memory now.

If an Apple iMac computer has 4Gb of memory and was running Apple Mac OS Yosemite without any problems, 4Gb of memory is ok, but 8Gb gives much better overall performance.

Once a 4Gb Apple iMac computer is upgraded to Apple MacOS Catalina from Mac OS Yosemite or from MacOS El Capitan, a iMac can become slow or very slow.

This is because 4Gb of memory is simply not optimised for the newer Apple MacOS operating system software version installed.

And by design Apple wants customers to purchase a new Apple Mac computer, so they keep the memory requirements at 4Gb. 

Most Apple customers simply choose to then purchase a new Apple iMac computer to resolve the problem.

However, some Apple iMac computers, and Apple MacBook Pro laptop can be upgraded from 4Gb to 8Gb memory.

How to optimise MacOS Catalina Performance.

The solution is more memory, it may be possible to upgrade the Apple iMac memory from 4Gb to 8Gb or even 16GB.

This will make Apple MacOS Catalina much more responsive, why, the more memory installed from 4Gb makes a big performance boost.

This is not the only reason; the storage volume may be fragmented after the Apple Mac OS operating system software upgrade.

Or the Apple iMac computer is simply indexing the hard disk with Apple Spotlight.

The very best way to get the performance from MacOS Catalina is to use flash storage in lieu of SATA storage volume.

Advanced MacOS Catalina Troubleshooting.

IF you have 8Gb of memory and you still have a slow Apple iMac computer after the Apple MacOS Catalina upgrade?

A third-party Apple Mac computer application can cause the Apple iMac computer to run slowly or very slow.

A Apple Specialist will look at Adobe, Microsoft, Anti-Virus and out-dated Mac utilities and simply update or remove.

MacOS Catalina Third Party software applications update.

By reviewing the installed third-party applications that are installed on your Apple Mac computer can help.

The best possible performance can be achieved by making sure that all of your third-party applications are upto date.

Slow 1Tb SATA iMac Drive.

Apple iMac computers that have a iMac with a 1Tb SATA hard disk drive, the performance can be extremely slow.

Why? When Apple manufactured your once new Apple iMac computer, they use different vendors for the internal storage volume.

Some Apple iMac computers that have a 70% full storage volume and are using a Seagate or Western digital 1Tb SATA drive, can become slow after a MacOS Catalina upgrade.

Is your Apple iMac suddenly slow?

A Apple iMac computer can suddenly become slow or very slow, due to the internal design of the storage volume.

A solution for some customers would be to simply use Apple Time Machine to backup the Apple iMac computer.

And then restore the iMac to see if this helps resolve a slow Apple Mac running Apple MacOS Catalina.

iMac storage maintenance.

If the internal storage volume becomes slow either before or after a Apple MacOS upgrade.

Simply use the built in MacOS Catalina tools to review how much data is stored on your internal storage volume.

This can help resolve the slow performance of your Apple Mac computer.

For The Ultimate iMac Performance Choose SSD upgrade.

  • For the ultimate performance of Apple MacOS Catalina simply upgrade the Apple Mac computer to 8Gb.
  • Replace the Internal storage volume from a slow mechanical SATA drive to a faster solid-state drive, SSD.
  • A 2Tb SSD solid state drive is the best option for a 1Tb mechanical storage volume replacement.

Catalina Computer Maintenance.

Our Apple Mac computer maintenance engineers can help optimise the speed and performance of your Apple Mac computer. At Keith Thomas we have a Slow Mac Help guide that can give you information on how to speed up any Apple Mac computer.

  • Keith Thomas is a Apple Specialist and a Apple Mac computer engineer, that worked for Apple Computer UK.
  • And now provides a professional Apple IT Support service for home users, small business, self-employed, companies.
  • We can help you with optimising your Apple Macs computer storage capacity.
  • Our Apple Mac Catalina Apple specialists can help you troubleshoot a slow Apple Mac computer.
  • We can simply perform this service by Apple Mac Remote IT Support service.

To speak to one of our Apple Mac computer engineers, or to arrange for a Apple Mac computer performance review.



How to Clean Re-Install Catalina using the MacOS Recovery console.

Find out how to re-install Apple MacOS Catalina from the built in Apple Mac OS recovery console.

The Apple MacOS recovery console is used to help troubleshoot and to fix and to repair the storage volume of a Apple Mac computer and the MacOS recovery console is also used to perform and install a clean copy of the Apple Mac operating system on to a Apple Mac computer.

Usually, you need to use the Apple Mac OS recovery console if your Apple Mac computer will not startup, or you need to install a clean copy of the Apple Mac OS Catalina operating system software.

The Apple Mac OS Recovery console can also be used to repair the startup volume on your Apple Mac computer, in English this means the internal hard disk also known as the storage volume.

The MacOS recovery console can erase your personal data, so care and caution neds to be used when using the MacOS recovery console on MacOS Catalina.

If you have a newer version of MacOS or you have a Apple Silicon Mac computer this article is not the steps that you need to take to perform a clean install of MacOS. browse the command R does not work on an Apple Silicon Mac, and MacOS Monterey and newer has its own way to clean install MacOS. by using the MacOS recovery console from a shutdown, and then hold down the power button from a shutdown to enter the MacOS recovery console.

How can you update Apple Mac Safari and Apple Mac Mail to a newer version?

By updating the MacOS version on a Apple Mac computer, this will also update the version of Apple Mac Safari and also update Apple Mac Mail and the other applications that are pre-installed with MacOS, including Photos for Mac.

If you need to re install Apple Safari, Apple Mail, Apple Photos for Mac, when you choose the option to re-install Mac OS Catalina, the pre-installed applications are re-installed.

If you have had your Apple Mac computer for many years often a fresh start will get back any lost speed and performance.

If you have had a Apple Mac computer, and each year you have updated the macOS operating system software version, every year, in some cases it can benefit the computer by backing up the computer to the Apple iCloud and then use the MacOS Internet recovery mode to install the most recent macOS version. Find out how to use the MacOS internet recovery mode on your Apple Mac computer.

How to clean install macOS Catalina using the macOS built in recovery console on an Intel Apple Mac computer.

How to Clean Install MacOS Catalina using the macOS Recovery Console on a Intel Apple Mac Computer?

1. Make a backup of the Apple Mac computer to an external storage volume using Apple Time Machine.
2. Make sure your Apple Mac is connected to a Wi-Fi network or connect a Ethernet cable to the Apple Mac for a Internet connection.
3. Use the Apple Menu to shut down the Apple Mac computer.
4. Restart the Apple Mac computer with the Command Key (CMD) and the R key both held down together.
5. When the Apple Mac starts up it should be in the recovery console.
6. Choose the option to Re-Install MacOS from the recovery console screen.
7. Agree to the software license agreement and enter your Apple ID and password if prompted.
8. Follow the on-screen instructions to Re-Install MacOS Catalina.
9. Allow 45 mins or longer to complete the installation.
10. The re-install MacOS Catalina should not delete any of your personal data.

What to do if you cannot re-install macOS Catalina on a Apple Mac Computer?

If you cannot -re-install macOS Catalina on a Apple Mac computer, and you get an error message, one option which you can try is to obtain an external SSD flash storage volume and then use the macOS Recovery Console or use the Apple macOS Internet recovery mode to install macOS to the external SSD flash storage volume. this will bypass the need to use the internal Macintosh HD storage volume, which might have a hardware failure which cannot be fixed or repaired, using an external SSD storage volume is a great way to extend the use and life of a Apple iMac desktop computer that is a 2012 to 2019 model and the internal storage SATA volume has become slow, or is starting to fail or has failed. To use the macOS Recovery Console use the Command Key (CMD) and R, and for macOS Internet recovery mode use Option Command and R Keys to download the most recent version of macOS that your computer can support and use.

Before you re-install macOS Catalina.

Did you know that most Apple Mac computer software problems can be resolved without having to re-install macOS Catalina?

Use the Apple Disk Utility from the macOS recovery console to perform a Fid Aid repair on the startup volume on your Apple Mac computer. The Apple Disk Utilities can fix storage volumes problems which can cause applications like Microsoft Outlook or Adobe Photoshop to crash.

One of the main reasons for having to re-install macOS Catalina is Mal Malware or a Apple Mac computer will not startup. If you find that your Apple Mac computer will not start up the internal storage volume often needs Apple Disk Utility to repair the startup volume.

How to get help with re-installing macOS Catalina on your Apple Mac computer?

How to upgrade to Mac OS Catalina in a few easy to follow steps

How to upgrade to Mac OS Catalina in a few easy steps if you are on an earlier version of Mac OS and you now need to update to Mac OS Catalina.

macOS Big Sur and macOS Monterey has replaced macOS Catalina, and if you have a Apple Mac computer that is 2012 or 2013 macOS Catalina is the last macOS operating system software version that can be installed.

For 2014 and newer Apple Mac computers. Read How to update to mac OS Big Sur which is the update to MacOS Catalina for a 2012 Apple Mac computer.

If your Apple Mac computer is newer than 2012 the choose MacOS Big Sur, MacOS Monterey, or MacOS Ventura on 2017 or newer Apple Mac computers.

For the very best Apple Mac computer experience upgrade to macOS Big Sur in mid 2021 and macOS Monterey late 2021 and 2022.

Mac OS Sonoma, and Mac OS Ventura are much more newer versions of Mac OS, and for a 2012 Apple Mac computer, to use Mac OS Sonoma then a new Apple Mac Computer purchase is going to be needed.

Learn how to upgrade your Apple Mac computer to Mac OS Catalina with our quick and easy to follow guide.

Start here to upgrade to Mac OS Catalina.

  1. Check to see if your Apple Mac computer is compatible with Mac OS Catalina, is your Apple Mac computer supported?
  2. All Apple Mac computers that are 2012 models or later support Mac OS Catalina, with one exception MacBook! (2015)
  3. Make a backup of your Apple Mac computer using Apple Time Machine to an external storage volume.
  4. Review all of the third-party applications that you have installed on your Apple Mac computer.
  5. Use the Apple System Report tool to look for any non-64-bit applications that are installed.
  6. Make a note of any application that are shown as 32 bit.
  7. Use the built in MacOS Storage tool from the About this Mac, and Storage tab and review the applications section.
  8. or use an uninstaller to remove the 32-bit applications before you upgrade to Mac OS Catalina.

Use the about this Mac menu and choose system report and click on the Applications panel to show 64-Bit (intel) information.

Apple Mac OS X El Capitan System Report before upgrade to Catalina.

Use Apple Time Machine to back up your Apple Mac computer.

Apple recommends that you have a completed Apple Time Machine backup completed before you install Mac OS Catalina.

Our Apple Time Machine guide can help you create a Apple Time Machine backup before upgrading the macOS.

Apple System preferences showing Time Machine icon.

Get ready to install Mac OS Catalina

Make sure that you have at least 18.5Gb of free storage space on your Apple Mac computer before trying to install Mac OS Catalina.

Use the how to get older versions of macOS Apple support page to open the macOS Catalina from the Apple App Store. Use the link to open the Apple page. Use Link.

Mac OS Mojave to Mac OS Catalina.

To upgrade from Apple Mac OS Mojave to Apple Mac OS Catalina simply open the Apple Logo, system preferences, and choose the software update icon, to start the Mac OS Catalina installation. or use the link to open the Apple app store to download macOS Catalina.

Mac OS Lion to Catalina.

Before you can install Mac OS Catalina you will need to upgrade to Apple Mac OS El Capitan before you can upgrade to Catalina.

Apple Mac OS Yosemite and newer Apple Mac OS operating systems can be upgraded to Mac OS Catalina.

Warning: The performance of macOS Catalina from macOS Lion or macOS Mavericks upgrade can make your Apple Mac computer slow. The best macOS Catalina performance comes from Apple Macs with Flash SSD storage.


If you are upgrading a Apple MacBook, MacBook Air, MacBook Pro laptop computer make sure you are connected to your power adaptor, before starting the Mac OS Catalina installation.

Apple Mac OS Catalina FAQ Questions?

How can i download Mac OS Catalina?

Use the Apple Support website to open the link to start the Mac OS Catalina download use the link Here

Is there a manual to learn how to use Mac OS Catalina?

The Catalina help guide is found from the Apple Help menu at the top of the screen.
Its shown when you are in the Finder.
The best way to learn how to get around Mac OS Catalina is to have 1-2 hour of macOS Catalina training.

Does Microsoft Office 2008, 2011 work with Mac OS Catalina.

No, Microsoft Office for Mac 2019 or newer is fully supported with Mac OS Catalina.

Will my printer work with Mac OS Catalina?

Most printers will work with Mac OS Catalina, however older printers more than 6-7 years old may need a firmware upgrade or a 64 bit printer driver upgrade from the printer manufacturers website to work with macOS Catalina.

Can my Apple Mac computer be upgraded to macOS Catalina?

macOS Catalina only installs on 2012 to 2014 Apple Mac computers.
Use macOS Big Sur • or macOS Monterey from late 2021 on a 2014 or newer Apple Mac computer, or macOS Ventura for a 2020 or newer Apple Mac computer.


Do you need further assistance with instilling Apple Mac OS Catalina on your Apple Mac computer? Why not simply contact us and one of our Apple Mac computer engineers can simply remote control your Apple Mac computer to guide you thru all of the steps needed.

How to get help with installing macOS Catalina and macOS Ventura on your Apple Mac computer?

Read our free guide on how to update MacOS on your Apple Mac computer, or reach out to our Apple Mac computer engineers, and Apple Mac computer consultants to get help with a MacOS update, or MacOS upgrade.