How do I install Sierra WITHOUT having to install OSX Server?
Background:
When I bought my Mac-mini (2011) I bought the server version of OS X (Snow Leopard I think). When the next version (Lion) came out, I just upgraded the OS, and sacrificed the server option (because I didn't want to pay for it and I didn't use any server features anyway)
Repeat for Mountain Lion - I just upgraded the OS
Repeat for Mavericks
Repeat for Yosemite
But Sierrra won't let me just upgrade the OS. When I get to the install options, the HDD that contains my current Yosemite install is greyed out, and when I hover over the greyed out icon I see a message:
"macOS Sierra supports macOS Server version 5.2. To upgrade your Server data you will first need to install OS X 10.10 or 10.11 and OS X Server version 4 or 5." (See image below)
I don't WANT to upgrade my server. I don't WANT any of the server functions, and had thought I'd lost them when I did the Lion upgrade back in 2011/12
So my question is, How do I install Sierra WITHOUT having to install OSX Server version 4 or 5 first?
RedNectar
Mac mini, OS X El Capitan (10.11.6)