> not sure why the attach rpi for every mac mini, wouldn't it be cheaper to have one rpi and 9 mac minis connectd to 10 port switch?
Simple... they're (likely) running something on the Raspberry Pi's that sets them up as USB gadgets, aka the Mac Mini "sees" a virtual keyboard and mouse. That's enough to manage remote provisioning.
To replicate that they'd need a KVM switch which doesn't have some weird edge case in how exactly it does USB-C switching, and it needs to be remotely controlled. A Pi is cheaper plus the failure modes of a Pi are more understood than the failure mode of some weird ass KVM switch someone cobbled together in China.
Simple... they're (likely) running something on the Raspberry Pi's that sets them up as USB gadgets, aka the Mac Mini "sees" a virtual keyboard and mouse. That's enough to manage remote provisioning.
To replicate that they'd need a KVM switch which doesn't have some weird edge case in how exactly it does USB-C switching, and it needs to be remotely controlled. A Pi is cheaper plus the failure modes of a Pi are more understood than the failure mode of some weird ass KVM switch someone cobbled together in China.