Yes, thanks .. I know you have to unzip to an SD card, and I have one attached, but I need to download first .. and I have a MAC .. it's not downloading properly don't think .. It used to be that Humminbird downloads not MAC compatible only PC .. I'm on hold now with Humminbid ... I'll ask, but it was weekend and so thought I'd see if anybody on here had same issue. We've had that issue before but hoped it was fixed and they had made downloads MAC compatible.