OS X Mountain Lion

ENVI 5.0 and OS X 10.8 installation
ENVI 5.0 requires additional packages not included in OS X 10.8 Mountain Lion. 
 Java – ENVI has required Java for years. The ENVI installer will prompt the user and download it as part of ENVI installation. 
 X11 – X11 is no longer included with Mountain Lion, but the installer will prompt the user to manually download X11 v2.7.2 or later from http://xquartz.macosforge.org 
 Installing X11 using the installer defaults seems to work for most users. v2.7.4 was tested and does seem to work. 
 Exelis compatibility notes: http://www.exelisvis.com/Support/HelpArticleDetail/ArticleId/5294/ ENVI - IDL -object-graphics-can-fail-or-crash- ENV - IDL -on-Mac-OS-X-10-8-using-XQuartz-2-7-2.aspx

Install Sophos on Mac OS 10.8
By default, Mac OS 10.8 only allows users to install applications from ‘verified sources’. BOL 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—> Security & 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