Lakka on Mac mini can’t access boot loader

I’m very new here trying to get Lakka installed on an old Mac mini. I haven’t seen this particular issue anywhere. I got the usb flashed but when I reboot into Lakka I don’t get the boot loader at all. It just flashes the flower logo and boots to live mode. I would like to actually get it installed on the box. Not sure what I’m doing wrong.

You can’t type installer ?

May you try to make a test with our nightly builds ?