Hi all, read the forums all the time - finally setup an account just to ask this question since I cannot find a good answer. I have an older iMac running as an external display to a new iMac. As many of you know - you need a full operating system running on the "display mac" in order to do this... Since processor cycles = heat and energy waste, I want to configure a bare bones operating system. None of the push daemons, none of the iCloud stuff, spotlight etc - none of it is needed since that Mac just sits there donating its screen real estate. Is there a guide to Sierra that can walk me through processes safe to disable, how etc? Is there a tool that does this as a single click type operation? I cannot be the only one that thought of this issue. For me, I noticed that my "monitor" is sitting there just getting hot. So at the very least I killed the 5 year old OS install and all it entailed, loaded up a fresh copy of Sierra. But it still gets warmish. May be time to open it up and clean it - perhaps fans aren't running as efficient, but the original request holds regardless. Many thanks in advance!