Question: Computers Won't Shut Down After Connecting To Server
I am having a strange issue and I know it's not going to be easy to diagnose but let's give it a shot. I have two iMacs in my studio, a 4k and a 5k, both with El Capitan 10.11.2, and both connected to an ethernet network and talking to a server on a Mac Mini (latest OS and OS X Server).
I mention the server because I think it may be relevant, but that's just a guess.
Basically both of these computer have a strange inability to shut down. You choose Shut Down and they go through the motions all the way to the black screen with the spinning cogwheel, and then it just lingers there. Forever. Well, at least for 24 hours because that's the longest it went unnoticed once. Typically I wait a few minutes and then do a force shutdown. (I wait a few minutes because sometimes, not very often, but sometimes, the computers will successfully shut down.)
Both machines are wired to the server and frequently use fire sharing (SMB and AFP) to load files off of networked drives. Again, I mention this because this is the common thread between these machines that seems to be the outlier from typical usage, and I'm wondering if the connection to the server is the process that keeps the computers from shutting down properly.
If anyone can help point me in the right direction that would be awesome.
iMac (Retina 5K, 27-inch, Late 2015), OS X El Capitan (10.11.2), null