diff --git a/block/file-posix.c b/block/file-posix.c
index f3bd946..ff928b5 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -3929,11 +3929,6 @@
 static kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath,
                                 CFIndex maxPathSize, int flags);
 
-#if !defined(MAC_OS_VERSION_12_0) \
-    || (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_VERSION_12_0)
-#define IOMainPort IOMasterPort
-#endif
-
 static char *FindEjectableOpticalMedia(io_iterator_t *mediaIterator)
 {
     kern_return_t kernResult = KERN_FAILURE;