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 the 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 install.pkg file from Acronis so that the error message appears.
2. Go to System Preferences (in the Apple menu).
3. Choose Security and privacy, then the General tab if necessary.
4. A text will appear about install.pkg; click Open anyway.
5. Confirm your decision to open the file by clicking the appropriate button.