var err1 = errors.New("err1")
	err := SystemRootsError{Err: err1}
	if !errors.Is(err, err1) {
		t.Error("errors.Is failed, wanted success")
	}
}

func macosMajorVersion(t *testing.T) (int, error) {
	cmd := testenv.Command(t, "sw_vers", "-productVersion")
	out, err := cmd.Output()
	if err != nil {
		if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {