I have an iMac with Big Sur Operating System. How can I install the latest ICOM 7300 firm ware over to my ICOM radio thru my iMac. I need Help!! I think ICOM firmware is only download to Windows, but I have an iMac computer. Could some of you folks give me some help and pointers how to get it install on ICOM 7300 when I only have an iMac Computer with Big Sur operating system on the computer.