We will explain why Apple doesn’t make it easy to install an app from an unidentified developer, why you should be cautious, and how you can install apps like this on your Mac.

Just open the Installer application and select the software you want to install. One more thing: before installing any new applications, you may want to update the Installer itself by clicking on ...

Selecting Installer Log prompts Installer.app to open a log window that displays full text of what happened during installation. The default display in the log is to show Show Errors Only.