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How to install Memory-Map on MacOS Catalina

How to open an app that hasn’t been notarized by Apple

When installing Memory-Map, you may get a message saying "Apple cannot check it for malicious software".

Running software that hasn’t been signed may expose your computer and personal information to malware that can harm your computer or compromise your privacy. The Memory-Map app is digitally signed, so you can verify who wrote it and that it has not been tampered with. With MacOS Catalina, Apple has introduced a new restriction, preventing you from installing apps that have not been "Notarized" by Apple. However, it is possible to get around the restriction, and override your Mac security settings to open it. 

In macOS Catalina, when an app fails to install because it hasn’t been notarized, 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.

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

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.

*If you're prompted to open Finder: control-click the app in Finder, choose Open from the menu, and then click Open in the dialog that appears. Enter your admin name and password to open the app.