Q: Downgrade macOS Sierra to El Capitan Issue

Hello everyone,

earlier today I upgraded my Mac mini (Late 2012) to the latest version of macOS Sierra.

After 1 hour of usage I realized that a lot of my FCPX plugins weren't working.

I contacted the developers and they told me they won't update their plugins, and told me to downgrade to El Capitan.

I decided to listen to them and try to downgrade my OS.

I restarted the Mac and held down the Cmd-R or something like that which took me to the Disk Utility screen.

Then I went downstairs to eat dinner and when I went back up 30 minutes later my Mac had entered sleep mode for some reason.

I woke the Mac up and 40 seconds later the power went out for 5-10 minutes.

After the power outage I restarted my Mac which took me to a black screen with a blinking question mark folder.

I followed some tutorials online (including how to enter recover- and internet recovery mode) but after a while even internet recovery shows me the blinking question mark folder.

I don't know what to do.

And no - unfortunately I don't have a Time Machine backup.

But I have a backup with all of my most important files.

Is there any way to force the Mac to reset itself or something like that?

Please help.

Best regards,

Filip

Mac mini (Late 2012)

i7

16 GB RAM

500 GB Samsung 840-evo SSD

Intel HD Graphics 4000

UPDATE: The globe stopped spinning (again) but instead of showing me the blinking question mark folder a text appeared below the globe: "apple.com/support -2002F"