Garmin Express for Mac - Map Download estimated 50 hours?

Hi,

I just got my Forerunner 965 and before I could download apps (Spotify, etc) it has asked me to download the software update on Garmin Express. I have just downloaded the Garmin Express app on my MacBook Air, and it is definitely the current version (7.24.0.0). 

As part of getting the update, it is trying to download the maps and the estimated remaining time is constantly going up - it is up to 48 hours now, and is still increasing despite the complete % also increasing. 

I assume I have to keep the watch plugged in to my laptop to download the update, is there a way of making this go quicker? I just find it so hard to believe that it is 2024 and it will take me this long just to try and use an AUD $1000 watch... If I had known this was the case I may have just stayed with an Apple Watch. 

Just checked again and since typing the earlier sentence, the time remaining has gone up to 57 hours... I'd appreciate any tips/tricks to get it to download quicker. 

Thanks in advance