Hi there, I know this is an old post, but I was having this same issue and solved it. In my case it was a mac on ‘Snow Leopard 10.6.8’ which needed ‘Openfire’ to be downgraded from 4.1 to 3.6; so I tried modifying the file ‘Info.plist’ located inside the Openfire.pkg of the version that needs to be installed:
Copy ‘Openfire.pkg’ file from the mounted disk image to a folder you can modify (I simply copied it to my desktop).
Secondary click the ‘Openfire.pkg’ you just copied and select ‘Show Package Contents’.
Navigate to ‘Openfire.pkg/Contents/’ and edit Info.plist using your favorite editor (I just used TextEdit).
Go to line 11 (right below CFBundleShortVersionString) and change <string>3.8.1</string> into <string>3.10.6</string>
Go to line 15 and change <integer>8</integer> into <integer>10</integer>
Save the changes (in my case TextEdit showed a dialog confirming to overwrite even though the file is locked, I pressed ‘Yes’).
Double click your modified ‘Openfire.pkg’ to run the installation normally.
You can also try downloading Openfire 4.1.6 (latest version right now) install this version, then use the installer I modified so you can try to ‘force install’ version 3.6.4; after that you can install the version you need which is newer. Openfire 3.6.4 FORCED INSTALLER Openfire 3.8.1