remove usage of old string methods

volatility/framework/automagic/mac.py

@@ -257,6 +257,6 @@ class MacUtilities(object):
                     vnode = f.f_fglob.fg_data.dereference().cast("vnode")
                     path = vnode.full_path()
                 else:
-                    path = "<%s>" % ftype.replace("DTYPE_", "").lower()
+                    path = "<{}>".format(ftype.replace("DTYPE_", "").lower())
 
                 yield f, path, fd_num

volatility/framework/symbols/mac/extensions/__init__.py

@@ -137,7 +137,7 @@ class vnode(generic.GenericIntelProcess):
 
     def full_path(self):
         if self.v_flag & 0x000001 != 0 and self.v_mount != 0 and self.v_mount.mnt_flag & 0x00004000 != 0:
-            ret = "/"
+            ret = b"/"
         else:
             elements = []
             files = []
@@ -152,8 +152,7 @@ class vnode(generic.GenericIntelProcess):
             if ret:
                 ret = b"/" + ret
 
-        return ret
-
+        return ret.decode("utf-8")
 
 class vm_map_entry(generic.GenericIntelProcess):