Assorted spelling fixes.
diff --git a/dlls/iphlpapi/ifenum.c b/dlls/iphlpapi/ifenum.c
index 8a9135b..52e8413 100644
--- a/dlls/iphlpapi/ifenum.c
+++ b/dlls/iphlpapi/ifenum.c
@@ -22,7 +22,7 @@
  * interface:
  * - a specific IOCTL (Linux)
  * - looking in the ARP cache (at least Solaris)
- * - using the sysctl interface (FreeBSD and MacOSX)
+ * - using the sysctl interface (FreeBSD and Mac OS X)
  * Solaris and some others have SIOCGENADDR, but I haven't gotten that to work
  * on the Solaris boxes at SourceForge's compile farm, whereas SIOCGARP does.
  */