Mac Media Update

Dear All,

You all might be aware of the Mac Media Update Pop-up which comes up sometimes. I came to face one and in my dumbest moments, I accidentally clicked on download on the popup. BUT I deleted the downloaded (.dmg) file at the same time. I didn't open the (.dmg) file and download the program into my Mac. Can a computer still be hacked even if I don't download it?

My question now is whether my computer could be at a potential risk of hijack?

Since then I have deleted the downloaded (.dmg) file, cleared my safari history and have checked in different places whether there is any sort of malware hidden, but couldnt find any.