This is required for clean darwin compilation. Older versions fail with:
../go/pkg/mod/github.com/shirou/gopsutil@v3.20.12+incompatible/cpu/cpu_darwin_cgo.go:13:5: error: 'TARGET_OS_MAC' is not defined, evaluates to 0 [-Werror,-Wundef-prefix=TARGET_OS_]
^
1 error generated.
This is required for clean darwin compilation. Older versions fail with: