To unmount it run: hdiutil unmount /Volumes/AdbeRdr11003_en_US If you see the above it installed correctly. You will get some output like this: installer: Package name is Adobe Reader XI (11.0.03) (to explain the above just in case people are new to this, installer is the program, pkg is the option for installing pkg files, then /Path/to/Adobe\ reader.pkg (the '\' is the escape character to allow for spaces in command line) target is the option that tell you what base path this update to install to (in this case it is the base root directory) it is smart enough to figure out where adobe reader is) To install it (as sudo or root): installer -pkg Adobe\ Reader\ XI\ Installer.pkg -target / OSX will mount it to exactly: /Volumes/AdbeRdr11003_en_US In this case we are dealing with OSX and more specifically (at the time of this response) AdbeRdr11003_en_US.dmgįirst mount it with: hdiutil mount /Path/to/AdbeRdr11003_en_US.dmg (If you are getting this for another platform that what you are on (in my case linux to OSX) be sure to click on the link that asks about another language or OS) The most straight forward way I have found to do this has been to go to: /reader (or /flashplayer)Īnd get the most recent version for the OS you are trying to install with.