Fix problem with -psn argument on macOS

data/core/init.lua

@@ -461,9 +461,12 @@ function core.init()
       project_dir = arg_filename
       project_dir_explicit = true
     else
+      -- on macOS we can get an argument like "-psn_0_52353" that we just ignore.
+      if not ARGS[i]:match("^-psn") then
         delayed_error = string.format("error: invalid file or directory %q", ARGS[i])
       end
     end
+  end
 
   core.frame_start = 0
   core.clip_rect_stack = {{ 0,0,0,0 }}