I've got a Mac Mini running 10.8.5 and the appropriate Server version. It's configured as a local sync server for my Contacts, Calendar, Reminders, Notes, etc. My laptops and iPhone sync fine with this setup. I want to upgrade the Mini to El Capitan now that SMB is fixed(?); but I want to avoid having to reconfigure all the services again. I'm considering: 1) doing a clean install on an external drive, install El Capitan Server app, and then migrate apps and settings from the Mavericks boot drive in the Mini. Once I feel the new OS is working as before, I would then dupe it to the internal drive. 2) backup the internal Mavericks drive, upgrade it to El Captain, and then install Server? The first option seems less risky but is it doable? The second is probably quicker. Suggestions? Thanks.