This guide explains how to install the Acronis Agent on macOS for Swiss Backup even if the Gatekeeper application attempts to block the installation and causes an error “Unable to open install.pkg because Apple cannot verify that it does not contain malicious software”.

Allow Acronis in Gatekeeper

To do this:

1. Open the Acronis install.pkg file so that the error appears.
2. Go to System Preferences (in the Apple menu).
3. Select Security and Privacy then the General tab if necessary.
4. A text appears regarding install.pkg, click on Open Anyway.
5. Confirm your decision to open the file by clicking the appropriate button.