Open the .dmg You’ll find the .mpkg.
Right*click and “Show Package Contents” Open Contents Dir Open Packages Dir Install each of the 4 packages in this order:
(It is possible MacFUSE.pkg will install the two before it, but we ran each to play it safe.).
That’s it; it’s Truecrypt has been working fine for us using this method.
Confermo, vale anche per OS X 10.11 El Capitan.