diff --git a/mount/flags_bsd.go b/mount/flags_bsd.go
index 1ae59360..e90f929d 100644
--- a/mount/flags_bsd.go
+++ b/mount/flags_bsd.go
@@ -1,4 +1,4 @@
-//go:build freebsd || openbsd
+//go:build darwin || freebsd || openbsd
 
 package mount
 
diff --git a/mount/flags_unix.go b/mount/flags_unix.go
index b9a55e90..cf547a0f 100644
--- a/mount/flags_unix.go
+++ b/mount/flags_unix.go
@@ -1,4 +1,4 @@
-//go:build !darwin && !windows
+//go:build !windows
 
 package mount
 
diff --git a/mount/mount_errors.go b/mount/mount_errors.go
index 887e63fb..c08bc12c 100644
--- a/mount/mount_errors.go
+++ b/mount/mount_errors.go
@@ -1,4 +1,4 @@
-//go:build !darwin && !windows
+//go:build !windows
 
 package mount
 
diff --git a/mount/mount_unix.go b/mount/mount_unix.go
index 1c6905f6..4abd4ca0 100644
--- a/mount/mount_unix.go
+++ b/mount/mount_unix.go
@@ -1,4 +1,4 @@
-//go:build !darwin && !windows
+//go:build !windows
 
 package mount
 
diff --git a/mount/mounter_unsupported.go b/mount/mounter_unsupported.go
index b4f1f3e2..5e9540ce 100644
--- a/mount/mounter_unsupported.go
+++ b/mount/mounter_unsupported.go
@@ -1,7 +1,18 @@
-//go:build (!linux && !freebsd && !openbsd && !windows && !darwin) || (freebsd && !cgo) || (openbsd && !cgo)
+//go:build (!linux && !freebsd && !openbsd && !windows) || (freebsd && !cgo) || (openbsd && !cgo)
 
 package mount
 
+import (
+	"errors"
+	"runtime"
+)
+
+var errNotImplemented = errors.New("not implemented on this platform")
+
 func mount(device, target, mType string, flag uintptr, data string) error {
+	if runtime.GOOS != "freebsd" && runtime.GOOS != "openbsd" {
+		return errNotImplemented
+	}
+
 	panic("cgo required on freebsd and openbsd")
 }