Antivirus boot disk for Mac

Hello Larry,

We sorry to inform you that we don't have the boot scan disk for Mac.

I am using a Mac Pro with Mac Os 10.13.6 It was infected with a ransomware virus and I want to make sure it is removed. I want to do a boot scan to make sure there is no virus in the boot area. Is there a boot scan disk for this purpose? If so what is the best one.
Thanks 
Larry

Hello Larry,

We sorry to inform you that we don't have the boot scan disk for Mac.