On macOS, going to the System Profiler doesn’t give you the exact model number of your CPU, rather it just gives you the clock speed and the CPU branding (e.g; Intel Core i7).
You can, however, use Terminal to find the exact model number of your CPU. Just open up Terminal (Applications > Utilities > Terminal or use Spotlight to search for it) and run the following command:
sysctl -n machdep.cpu.brand_string
