Mac OS X - Disc Image Not Recognised

I just got my subscription, and attempted to download the .dmg from dashboard, it hung for a bit then webpage it took me to had crazy characters on it, download prompt didn’t appear. I am running Firefox on my iMac and from USA, East Coast. windows one appeared to open fine, but I obviously didn’t download that. secondary link appears to have worked for me as well. I am able to log-in and it’s now downloading engine from that application.