# Install Sophos on Mac OS 10.8

By default, Mac OS 10.8 only allows users to install applications from ‘verified sources’. <span class="caps">BOL</span> downloads are not verified; therefore, upon installation you will receive the error message: “Downloaded Program.mpkg” can’t be opened because it is from an unidentified developer.

To allow the installation:

Go to System Preferences—&gt; Security &amp; Privacy  
Click on the lock icon in the bottom, left corner and enter the Admin password  
In the General Tab, under the header “Allow applications downloaded from:”, choose Anywhere.

Source: [https://kb.wisc.edu/helpdesk/page.php?id=25443](https://kb.wisc.edu/helpdesk/page.php?id=25443)