Hey everyone, I've got a 2009 Mac Pro 4,1, 2.93GHz Quad Core Xeon with 16GB of ram I bought it as a modular storage hub. I just bought it last October, after replacing my 17" 2012 Macbook Pro that was destroyed in an accident. Currently, the Mac Pro has 4 1TB HD's, as well as a 240GB SSD mounted on a PCIe board, and 16GB of ram. The graphics card is stock, with the Nvidia GeForce 120 512mb one. I don't do any editing or gaming on this, so I haven't worried too much about it. Now, it's currently running El Capitan very smoothly. It's by far the best and fastest computer I've ever owned, and I definitely plan on using it, at least as a storage hub, for a long time. However, eventually, I'm going to have to upgrade as El Capitan isn't gonna be receiving security updates here in the next few years. I'm in no rush to upgrade at the moment. This brings me to my question however. Because it only runs up to El Capitan, I've been feeling a bit conflicted as to what I should do with it. I know I can flash the firmware to 2010 specs, but I'm not sure whether I want to do that just yet. I've thought out a couple options for it though, and wanted your input: When I buy my next Mac, probably a 5k iMac in a few years, once El Capitan isn't receiving security updates, turn the 4,1 into an offline storage hub, where I connect to it via Target Disk Mode, and continue to run it on El Capitan offline to watch movies, manage music and photos, etc. Turn it into a home server. Will it be safe to continue using it exclusively as a home server, even after El Capitan isn't getting security updates though? Also, is there a difference between the macos server app and the OS X server app, or is it just the name of the app itself? Obviously, it's cheaper and more secure to go with Option 1 since it removes the Internet connectivity aspect. However, I've been interested in networking lately, and thought it'd be a fun project to make a home server with my Mac. But I wasn't sure whether it'd be worth it and secure in the long run, if El Capitan isn't going to be getting any security updates in a year or two. Thanks in advance!