Even more late break-in MacOS tidbits...

crypto/des/des_locl.h

@@ -72,7 +72,11 @@
 
 #ifndef MSDOS
 #if !defined(VMS) || defined(__DECC)
-#include OPENSSL_UNISTD
+#ifdef OPENSSL_UNISTD
+# include OPENSSL_UNISTD
+#else
+# include <unistd.h>
+#endif
 #include <math.h>
 #endif
 #endif

crypto/des/read_pwd.c

@@ -58,7 +58,11 @@
 
 #if !defined(MSDOS) && !defined(VMS) && !defined(WIN32)
 #include <openssl/opensslconf.h>
-#include OPENSSL_UNISTD
+#ifdef OPENSSL_UNISTD
+# include OPENSSL_UNISTD
+#else
+# include <unistd.h>
+#endif
 /* If unistd.h defines _POSIX_VERSION, we conclude that we
  * are on a POSIX system and have sigaction and termios. */
 #if defined(_POSIX_VERSION)

e_os.h

@@ -252,7 +252,7 @@ extern "C" {
 #  else
      /* !defined VMS */
 #    ifdef OPENSSL_UNISTD
-#      include OPENSLL_UNISTD
+#      include OPENSSL_UNISTD
 #    else
 #      include <unistd.h>
 #    endif