Can't Install on Catalina (Mac Version 10.15)

How to safely open applications on your Mac

 

macOS includes a technology called Gatekeeper, that's designed to ensure that only trusted software runs on your Mac.

 


 

You should install your Topaz Labs software as the Admin whenever possible. 


This article will show you how to check if you are logged in as an admin:
How to Check If I am an Admin on the Mac

This article will show you how to create an admin user if you are not logged in as an admin:
How to Create an Admin User on the Mac

 


 

View the app security settings on your Mac

 

By default, the security and privacy preferences of your Mac are set to allow apps from the App Store and identified developers. For additional security, you can choose to allow only apps from the App Store.

In System Preferences, click Security & Privacy, then click General. Click the lock and enter your password to make changes. Select App Store under the header “Allow apps downloaded from App Store and Identified developers”

 

1.jpg

 


 

Open a developer-signed or notarized app

 

If your Mac is set to allow apps from the App Store and identified developers, the first time that you launch a new app, your Mac asks if you’re sure you want to open it. 

An app that has been notarized by Apple indicates that Apple checked it for malicious software and none was detected:

 

2.jpg

 

Prior to macOS Catalina, opening an app that hasn't been notarized shows a yellow warning icon and asks if you're sure you want to open it:

 

3.jpg

 


 

If you see a warning message and can’t install an app

 

If you have set your Mac to allow apps only from the App Store and you try to install an app from elsewhere, your Mac will say that the app can't be opened because it was not downloaded from the App Store.*

 

4.jpg

 

Then go into System Preferences -> Security and Privacy and make sure that it is set to allow apps developed from the app and identified developers.

 

1.jpg

 

If your Mac is set to allow apps from the App Store and identified developers, and you try to install an app that isn’t signed by an identified developer or—in macOS Catalina—notarized by Apple, you also see a warning that the app cannot be opened.

 

5.jpg

 

If you see this warning, it means that the app was not notarized, and Apple could not scan the app for known malicious software. 

You may want to look for an updated version of the app in the App Store or look for an alternative app.

 


 

If macOS detects a malicious app

 

If macOS detects that an app has malicious content, it will notify you when you try to open it and ask you to move it to the Trash. 

6.jpg

 


 

How to open an app that hasn’t been notarized or is from an unidentified developer

 

Running software that hasn’t been signed and notarized may expose your computer and personal information to malware that can harm your Mac or compromise your privacy. 

If you’re certain that an application you want to install is from a trustworthy source and hasn’t been tampered with, you can temporarily override your Mac security settings to open it. 

In macOS Catalina and macOS Mojave, when an app fails to install because it hasn’t been notarized or is from an unidentified developer, it will appear in System Preferences > Security & Privacy, under the General tab. Click Open Anyway to confirm your intent to open or install the app.

 

9.jpg

 

The warning prompt reappears, and you can click Open.*

 

8.jpg

 

The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app.

 

Was this article helpful?
1 out of 3 found this helpful
Have more questions? Submit a request
Check out our forums for more information!