+# For the battery plugin
+AC_CHECK_HEADERS(IOKit/ps/IOPowerSources.h, [], [],
+[
+#if HAVE_IOKIT_IOKITLIB_H
+# include <IOKit/IOKitLib.h>
+#endif
+#if HAVE_IOKIT_IOTYPES_H
+# include <IOKit/IOTypes.h>
+#endif
+])
+AC_CHECK_HEADERS(IOKit/ps/IOPSKeys.h)
+
+# For the `disk' plugin
+AC_CHECK_HEADERS(IOKit/IOBSD.h)
+AC_CHECK_HEADERS(IOKit/storage/IOBlockStorageDriver.h)
+