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Matlab 2019b installer does not install on Mac OS Catalina

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Roozbeh Yousefzadeh
Roozbeh Yousefzadeh on 12 Dec 2019
Answered: Stefan Liebich on 29 Jan 2020
After upgrading to Mac OS Catalina, I have had troubles with Matlab 2019a. Unfortanetly, the installer for Matlab 2019b does not work either. Here is the error I get when I run the 2019b installer.
Error : unable to connect to host.
sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find
valid certification path to requested target
Should I remove the 2019a installation, before installing 2019b?

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Jared Smith
Jared Smith on 18 Jan 2020
Can someone please help with this? I have the same issue for Matlab R2019b on MacOS Catalina 10.15.1Screen Shot 2020-01-18 at 15.58.48.png
Johan Van Audekerke
Johan Van Audekerke on 21 Jan 2020
Can someone help please same problem here on a windows server 2016 trying to install Matlab R2019b
Walter Roberson
Walter Roberson on 21 Jan 2020
https://stackoverflow.com/questions/21076179/pkix-path-building-failed-and-unable-to-find-valid-certification-path-to-requ

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Answers (2)

SaiDileep Kola
SaiDileep Kola on 22 Jan 2020
Hi Roozbeh,
It is not necessary to remove the 2019a installation to install the 2019b version but the issue might be because of license after the OS upgradation, you can contact your sales representative to know your license terms, in case you don’t know you can follow this link

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Stefan Liebich
Stefan Liebich on 29 Jan 2020
Installing the Java Runtime Environment helped for me. You can get it, e.g., here:
https://www.java.com/de/download/manual.jsp
I chose the offline version

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