Apple Mac mini MC815LL/A i5-2415M Midi 2011 8GB RAM 500GB HDD MacOS High Sierra | eBay
My mid-2011 Mac Mini at Home running MacOS Catalina 10.15.1 (DosDude1 Catalina Patcher) : r/mac
Home Office setup with my trusty Mac Mini 2011 (Server) running macOS Catalina and some of my Productivity Gadgets, overseen by a Mac Classic II : r/macsetups
macOS Catalina: A month with Apple's latest desktop update | Engadget
How to Downgrade macOS Big Sur to Catalina or Mojave | OSXDaily
Identify your Mac mini model - Apple Support
Review: macOS Catalina 10.15 is what Apple promised the Mac could be, and is a crucial upgrade | AppleInsider
Download and install macOS Catalina on MacBookAir 2009 2010 2011 and Unsupported Mac. - YouTube