diff --git a/python/grass/ctypes/ctypesgen/libraryloader.py b/python/grass/ctypes/ctypesgen/libraryloader.py
index 4d9201181e0..841572dad34 100644
--- a/python/grass/ctypes/ctypesgen/libraryloader.py
+++ b/python/grass/ctypes/ctypesgen/libraryloader.py
@@ -168,6 +168,7 @@ def getdirs(self, libname):
         dyld_fallback_library_path = _environ_path("DYLD_FALLBACK_LIBRARY_PATH")
         if not dyld_fallback_library_path:
             dyld_fallback_library_path = [os.path.expanduser("~/lib"), "/usr/local/lib", "/usr/lib"]
+        dyld_fallback_library_path.extend(_environ_path('LD_RUN_PATH'))
 
         dirs = []
 
diff --git a/python/grass/ctypes/ctypesgen/parser/preprocessor.py b/python/grass/ctypes/ctypesgen/parser/preprocessor.py
index 6f542e7759c..a2a4e12d784 100755
--- a/python/grass/ctypes/ctypesgen/parser/preprocessor.py
+++ b/python/grass/ctypes/ctypesgen/parser/preprocessor.py
@@ -159,10 +159,29 @@ def parse(self, filename):
 
         self.cparser.handle_status(cmd)
 
-        pp = subprocess.Popen(
-            cmd, shell=True, universal_newlines=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE
-        )
-        ppout, pperr = pp.communicate()
+        pp = subprocess.Popen(cmd,
+                              shell=True,
+                              universal_newlines=True,
+                              stdout=subprocess.PIPE,
+                              stderr=subprocess.PIPE)
+        try:
+            ppout, pperr = pp.communicate()
+        except UnicodeError:
+            # Fix for https://trac.osgeo.org/grass/ticket/3883,
+            # handling file(s) encoded with mac_roman
+            if sys.platform == 'darwin':
+                pp = subprocess.Popen(cmd,
+                                      shell=True,
+                                      universal_newlines=False,  # read as binary
+                                      stdout=subprocess.PIPE,
+                                      stderr=subprocess.PIPE)
+                ppout, pperr = pp.communicate()
+
+                data = ppout.decode('utf8', errors='replace')
+                ppout = data.replace('\r\n', '\n').replace('\r', '\n')
+                pperr = pperr.decode('utf8', errors='replace')
+            else:
+                raise UnicodeError
 
         for line in pperr.split("\n"):
             if line: