diff --git a/lib/api.rb b/lib/api.rb
index <HASH>..<HASH> 100644
--- a/lib/api.rb
+++ b/lib/api.rb
@@ -3,7 +3,11 @@ require 'ffi'
 module Proj
   module Api
     extend FFI::Library
-    ffi_lib ['libproj', 'libproj-15', 'libproj-12']
+    ffi_lib ['libproj',
+             'libproj-15', # Proj 6
+             'libproj-12', # Proj 5
+             '/opt/local/lib/proj6/lib/libproj.dylib', # Macports proj6 package
+             '/opt/local/lib/proj5/lib/libproj.dylib'] # Macports proj package
 
     typedef :pointer, :PJ
     typedef :pointer, :PJ_CONTEXT
Update api search path to work with MacPorts.