AFAIK, I do not have any special utilities, such as DiskAid. As I did not attempt to open what was ostensibly downloaded, can it be that what looked like completed DL, was a false positive of some sort?
Harv 27" i7 iMac (10.13.6), iPhone Xs Max (12.1)
Those who can make you believe absurdities can make you commit atrocities. ~Voltaire