# Package installer failed on MacOS Catalina
**URL:** https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891
**Category:** ParaView Support
**Created:** [November 2, 2019, 12:42am UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891 "2019-11-02T00:42:52Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@Johnny\_Seales](https://discourse.paraview.org/u/Johnny_Seales)
#### Post date: [November 2, 2019, 12:42am UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/1 "2019-11-02T00:42:52Z")
Here is the message:
**“ParaView-5.7.0-MPI-OSX10.12-Python2.7-64bit.pkg” can’t be opened because Apple cannot check it for malicious software.**
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [November 4, 2019, 7:14am UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/2 "2019-11-04T07:14:20Z")
@cory.quammen
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [November 4, 2019, 2:07pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/3 "2019-11-04T14:07:44Z")
Thanks for the report. We are going to need to install Catalina on a local machine to debug.
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [November 4, 2019, 2:08pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/4 "2019-11-04T14:08:56Z")
Issue reported: [https://gitlab.kitware.com/paraview/paraview/issues/19432](https://gitlab.kitware.com/paraview/paraview/issues/19432)
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### Author:  [@wascott](https://discourse.paraview.org/u/wascott)
#### Post date: [November 4, 2019, 7:15pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/5 "2019-11-04T19:15:40Z")
> **[Why macOS Catalina is breaking so many apps, and what to do about it](https://www.theverge.com/2019/10/12/20908567/apple-macos-catalina-breaking-apps-32-bit-support-how-to-prepare-avoid-update)**
>
> It’s a new age for Apple software, but that means being prepared for what might go wrong
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### Author:  [@dave3d](https://discourse.paraview.org/u/dave3d)
#### Post date: [December 5, 2019, 8:24pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/6 "2019-12-05T20:24:20Z")
Hi. Has there been any update on this problem. I just tried to run Paraview on my MacBook Pro, running Catalina, and I encountered the same problem.
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### Author:  [@James](https://discourse.paraview.org/u/James)
#### Post date: [December 13, 2019, 8:37am UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/7 "2019-12-13T08:37:30Z")
Hello,
l also came across this problem and thought that I would not be able to use ParaView on my macbook pro (with German locale). However, on the net, I found a tip that helped:
I ran the ParaView dmg installer which produced the warning message. After that, I went into Finder and located the ParaView app (I found it in the /Programme directory). Then, by right clicking the ParaView app icon, I was able to open the application from the context menu.
Perhaps this is helpful for some of you.
James
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### Author:  [@James](https://discourse.paraview.org/u/James)
#### Post date: [December 13, 2019, 8:44am UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/8 "2019-12-13T08:44:28Z")
There was a small typo: the Programme directory lies in the home directory.
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### Author:  [@Andy\_62](https://discourse.paraview.org/u/Andy_62)
#### Post date: [April 27, 2020, 4:41pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/9 "2020-04-27T16:41:49Z")
Having just been down this path (ParaView 5.8.0, MacBook Pro Mid 2012, Catalina 10.15.4), in addition to James’ answer above, you can also do, as Apple suggest (link below), Ctrl left click on the ParaView Icon in Finder and select Open, then Open again when it again says that the app can’t be opened “… because Apple can’t check for malicious software”.
Right click didn’t work for me.
Words from Apple…
> **[Open a Mac app from an unidentified developer](https://support.apple.com/en-gb/guide/mac-help/mh40616/mac)**
>
> If you try to open an app by an unidentified developer and you see a warning dialogue, you can override your security settings to open it.
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [July 8, 2020, 7:31pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/10 "2020-07-08T19:31:53Z")
An update on this issue. I have worked out the steps needed to notarize ParaView, and will do so with the release of ParaView 5.8.1-RC2.
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### Author:  [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [July 9, 2020, 5:07pm UTC](https://discourse.paraview.org/t/package-installer-failed-on-macos-catalina/2891/11 "2020-07-09T17:07:02Z")
I posted updated ParaView 5.8.0 and 5.8.1-RC1 .dmg and .pkg files on [www.paraview.org/download](http://www.paraview.org/download). Please give them a try.