--- Utilities/cmlibuv/src/unix/core.c
+++ Utilities/cmlibuv/src/unix/core.c
@@ -559,10 +559,24 @@
  * will unwind the thread when it's in the cancel state. Work around that
  * by making the system call directly. Musl libc is unaffected.
  */
+
+#if defined(__GNUC__)
+#define GCC_VERSION \
+	(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
+#endif
+#if defined(__clang__) || (defined(GCC_VERSION) && (GCC_VERSION >= 40500))
+/* gcc diagnostic pragmas available */
+# define GCC_DIAGNOSTIC_AVAILABLE
+#endif
+
 int uv__close_nocancel(int fd) {
-#if defined(__APPLE__)
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
+
+#if defined(GCC_DIAGNOSTIC_AVAILABLE)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdollar-in-identifier-extension"
+#endif
+
 #if defined(__LP64__) || TARGET_OS_IPHONE
   extern int close$NOCANCEL(int);
   return close$NOCANCEL(fd);
@@ -570,7 +584,9 @@
   extern int close$NOCANCEL$UNIX2003(int);
   return close$NOCANCEL$UNIX2003(fd);
 #endif
+#if defined(GCC_DIAGNOSTIC_AVAILABLE)
 #pragma GCC diagnostic pop
+#endif
 #elif defined(__linux__) && defined(__SANITIZE_THREAD__) && defined(__clang__)
   long rc;
   __sanitizer_syscall_pre_close(fd);
@@ -1368,8 +1384,12 @@
   if (name == NULL)
     return UV_EINVAL;
 
+#if ( defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED < 1050)
+    unsetenv(name);
+#else
   if (unsetenv(name) != 0)
     return UV__ERR(errno);
+#endif
 
   return 0;
 }
--- Utilities/cmlibuv/src/unix/fs.c
+++ Utilities/cmlibuv/src/unix/fs.c
@@ -1072,7 +1072,7 @@
 
     return -1;
   }
-#elif defined(__APPLE__)           || \
+#elif defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1050 || \
       defined(__DragonFly__)       || \
       defined(__FreeBSD__)         || \
       defined(__FreeBSD_kernel__)
@@ -1198,7 +1198,7 @@
   ts[0] = uv__fs_to_timespec(req->atime);
   ts[1] = uv__fs_to_timespec(req->mtime);
   return utimensat(AT_FDCWD, req->path, ts, AT_SYMLINK_NOFOLLOW);
-#elif defined(__APPLE__)          ||                                          \
+#elif defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1050 ||           \
       defined(__DragonFly__)      ||                                          \
       defined(__FreeBSD__)        ||                                          \
       defined(__FreeBSD_kernel__) ||                                          \
@@ -1452,7 +1452,7 @@
   dst->st_blksize = src->st_blksize;
   dst->st_blocks = src->st_blocks;
 
-#if defined(__APPLE__)
+#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
   dst->st_atim.tv_sec = src->st_atimespec.tv_sec;
   dst->st_atim.tv_nsec = src->st_atimespec.tv_nsec;
   dst->st_mtim.tv_sec = src->st_mtimespec.tv_sec;
--- Utilities/cmlibuv/src/unix/tty.c
+++ Utilities/cmlibuv/src/unix/tty.c
@@ -87,7 +87,7 @@
   int dummy;
 
   result = ioctl(fd, TIOCGPTN, &dummy) != 0;
-#elif defined(__APPLE__)
+#elif defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
   char dummy[256];
 
   result = ioctl(fd, TIOCPTYGNAME, &dummy) != 0;