I’ve got an old Mac Mini Server (2009, MacMini3,1) that has been happily running 10.6.8 Server for the last 8 years. I had to ‘upgrade’ it to Mavericks for various reasons and now it’s all weird.
It’s partially working - About this Mac says it’s running 10.9.5 - but the UI still looks like it’s 10.6.8 and various things don’t work.
I can’t, for example, get the App Store to do anything. It launches, but everything is greyed out and it’s basically completely unresponsive even though the menu items that should be selectable are. They just do nothing and none of the tabs can be selected. It also still has both Software Update and App Store entries in the Apple Menu. And the 10.6.8 version of Safari, among many other strange things.
I’ve tried restarting it a few times. I’m guessing I will need to reinstall 10.9.5, but I can’t download it again directly at the moment and I would still prefer not to just nuke the startup disk from low orbit if possible.