OK Hi, in addition to the problems with the mac mini m1, I also have a language problem. I am from the Netherlands. So before I thoroughly read and try out Logitech's story, I couldn’t give you an answer. I also do not fully understand your comment. But OK, I went through everything again, LCC won't work anymore for big sur, so… and Logitech Options does not work properly with my MX Master S2 mouse, bluetooth connection goes on and off, on off on off .... I connected my A1243 (now directly) to the M1 again and it works!!!! But now I no longer have a USB port for my Iphone, I do have a powered hub, but the M1 does not want to allow contact there, it also switches on off on off .... I do not know what apple is up to. One advantage of the M1 is that it doesn't get hot, but hey, if you can't connect anything to it, that's not surprising.