why my Mac don't support boot camp

If it’s apples new apple M1 then it’s because windows you can purchase is only working on intel cpus not arm cpus

What version model/year Mac? What processor? What OS version?

M1 Macs can not run Windows due to processor (hardware) incompatibility.

samhar64 wrote:

Thx a lot so how can i install windows on my mac what alternative do i have?

You can't if it is a M1 Mac.