2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221905In this talk we discuss intermediate mass black holes (IMBHs) by their amplilification of distant sources; MACHO searches have studied event times $2 h \lesssim t_0 \lesssim 2 y$ corresponding masses in the range $10^{-6} M_{\odot} \lesssim M \lesssim 100 M_{\odot}$. We suggest that larger masses up to $10^6 M_{\odot}$ are also of considerable interest by arguments about the entropy of the universe. One percent by mass of dark energy can provide ninety-nine percent of total entropy.7 pages latex. Talk at Dark Matter Conference, Galileo Galilei Institute Florence Italy, February 9-11, 2009Cosmology and Nongalactic Astrophysicstext