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I am using a 2019 MacBook Pro and I haven't updated the macOS in a while. Now when I want to update it to the latest version (macOS Catalina).

Every time I try it in System Preferences, I get an error (connection lost or time out).

And I also can't download it from Apple website, because macOS Catalina requires macOS 10.15, and my macOS version is 10.14.

This error occurs on another mac too. What should I do?

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  • You don’t update from System Preferences, you download Catalina from the App Store. Can you confirm how you’re trying to upgrade? Go to this link: apple.com/macos/catalina You should see an “upgrade now” button in the upper right corner of the page.
    – Allan
    Aug 5, 2020 at 9:34
  • @Allan We also see this at work when the system has a certificat / time / other error. OP may need to try recovery or a direct link to kick the App Store to get the correct installer... Since this occurs on several macs, it’s likely a network error as well. I have three parts to my answer as there are three different things that can cause this and we don’t know which affects people, yet.
    – bmike ♦
    Aug 5, 2020 at 9:38
  • That is a direct link. I’m trying to account for not knowing which country the OP is in. But you get an error in Sys Prefs for a major release upgrade?
    – Allan
    Aug 5, 2020 at 9:41
  • @Allan When I go to this link it gets me to appstore and when I want to download form appstore it brings me to system preferences and downloads it from here and it gives the same error.
    – Bardia Modaberi
    Aug 5, 2020 at 9:56
  • 1
    Just tossing this out there...noticed you were from Iran - I'm vaguely familiar with current/new sanctions against Iran - could it be that products like this got sanctioned? (I don't know, this is why I'm asking.)
    – Allan
    Aug 5, 2020 at 10:28

2 Answers 2

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macOS 10.15 is macOS Catalina. The former is the major version number for macOS, while the latter is the marketing name. Both are essentially the same operating system.

So, you do not need macOS 10.15 to install macOS Catalina. You can go to Mac App Store and search for macOS Catalina, or use the following link to access the macOS Catalina page on the Mac App Store:

https://apps.apple.com/app/macos-catalina/id1466841314

Once you have the page open, click on the GET or the iCloud download button button to download the macOS Catalina installer.

Once downloaded, the installer would launch automatically and guide you through the installation of macOS Catalina 10.15.

Using the Mac App Store would also let you automatically get the current latest update of macOS Catalina, which is macOS Catalina 10.15.6 (6th point release of macOS Catalina).

Should you encounter any issue with installation, make sure you are logged in with an account with administrative access.

Also, make sure you have a backup of your critical data for a very less likely case where the installation may fail.

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  • Nice link - I still use the old style since that’s what Apple has in their KB - but I’ll probably start using apps.apple.com as it has some better behaviors and I expect Apple to move to it soon on the KB side, too.. More importantly - good tips on backup
    – bmike ♦
    Aug 5, 2020 at 9:48
  • The link is not working anymore on a french Mojave install. Same for itunes.apple.com/fr/app/macos-catalina/id1466841314.
    – Antoine F.
    Jan 23, 2021 at 13:56
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You have three options:

  1. Use Recovery. Hold Option-Command-R when you restart and install macOS - https://support.apple.com/en-us/HT201314
  2. Install Catalina. Visit this link in Safari - https://itunes.apple.com/us/app/macos-catalina/id1466841314?ls=1&mt=12
  3. Install Mojave. Visit this link in Safari - https://itunes.apple.com/us/app/macos-mojave/id1398502828?ls=1&mt=12 Then try any update you prefer to get to Catalina.
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    When I want to download from appstore it takes me to system preferences and downloads it from here and it gives me the same error.
    – Bardia Modaberi
    Aug 5, 2020 at 9:54
  • @BardiaModaberi Try checking if your Internet connection is working fine, and/or switching to a different network.
    – Nimesh Neema ♦
    Aug 5, 2020 at 10:04
  • @NimeshNeema My internet is fine. but are you sure that switching the internet would help?
    – Bardia Modaberi
    Aug 5, 2020 at 10:18
  • @BardiaModaberi That should most likely resolve the issue as the macOS Catalina download is accessible from Apple's servers and it doesn't appear to be a server issue.
    – Nimesh Neema ♦
    Aug 5, 2020 at 10:19
  • @NimeshNeema So what should I do?
    – Bardia Modaberi
    Aug 5, 2020 at 11:48

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