no se conectan dispositivos bluetooth

Ya intente el modo debug en bluetooth options, tb reseteando PRAM, si funcionaban pero después de un update (Sierra a Sierra High), ahora tengo Mojave y sigue igual

English (translated by @ajcooke01):

Unable to connect to Bluetooth

Bluetooth worked but after I updated from Sierra to High Sierra it stopped working. I have installed Mojave and the problem still remains.

I already tried the debug mode in Bluetooth options and resetting PRAM.

Ésta es la información de mi iMac, no se si requieras algún dato esencial, he seguido intentando con muchos tips en internet pero nada, ahora tengo Mojave recién.

This is the information of my iMac, I do not know if you need some essential information, I have continued trying with many tips on the internet but nothing, now I have Mojave.

iMac "Core i5" 2.8 21.5-Inch (Late 2015)

Thanks a lot, I hope can do it well with this guides!