Hi Marian my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
Mcafee comes with both the version is a compact disk or download all you have to do is start installaion and it will automatically choose 32 bit or 64bit operating system you have.
There is no specific 64 bit Mcafee available separately.
I hope I've provided the information you were seeking. Feel free to ask or reply me so that i can continue to help you answer you question further. Thank you.