diff --git a/.hgignore b/.hgignore
index 910dc541..16161c5e 100644
--- a/.hgignore
+++ b/.hgignore
@@ -6,6 +6,7 @@ run.py
 *.so
 *.mo
 *.pyd
+.tm_*
 *.xcodeproj/xcuserdata
 *.xcodeproj/project.xcworkspace/xcuserdata
 conf.json
diff --git a/build.py b/build.py
index eb15220b..5389146f 100644
--- a/build.py
+++ b/build.py
@@ -12,8 +12,7 @@ from optparse import OptionParser
 import shutil
 import json
 
-from setuptools import setup
-from distutils.extension import Extension
+from setuptools import setup, Extension
 
 from hscommon import sphinxgen
 from hscommon.build import (add_to_pythonpath, print_and_do, copy_packages, filereplace,
@@ -38,17 +37,15 @@ def parse_args():
 
 def build_cocoa(edition, dev):
     from pluginbuilder import build_plugin
+    build_cocoa_proxy_module()
     print("Building dg_cocoa.plugin")
-    if dev:
-        tocopy = ['cocoa/inter']
-    else:
-        specific_packages = {
-            'se': ['core_se'],
-            'me': ['core_me'],
-            'pe': ['core_pe'],
-        }[edition]
-        tocopy = ['core', 'hscommon', 'cocoa/inter'] + specific_packages
-    copy_packages(tocopy, 'build')
+    specific_packages = {
+        'se': ['core_se'],
+        'me': ['core_me'],
+        'pe': ['core_pe'],
+    }[edition]
+    tocopy = ['core', 'hscommon', 'cocoa/inter', 'cocoalib/cocoa'] + specific_packages
+    copy_packages(tocopy, 'build', create_links=dev)
     cocoa_project_path = 'cocoa/{0}'.format(edition)
     shutil.copy(op.join(cocoa_project_path, 'dg_cocoa.py'), 'build')
     os.chdir('build')
@@ -59,11 +56,6 @@ def build_cocoa(edition, dev):
     if op.exists(pluginpath):
         shutil.rmtree(pluginpath)
     shutil.move('build/dist/dg_cocoa.plugin', pluginpath)
-    if dev:
-        # In alias mode, the tweakings we do to the pythonpath aren't counted in. We have to
-        # manually put a .pth in the plugin
-        pthpath = op.join(pluginpath, 'Contents/Resources/dev.pth')
-        open(pthpath, 'w').write(op.abspath('.'))
     os.chdir(cocoa_project_path)
     print('Generating Info.plist')
     app_version = get_module_version('core_{}'.format(edition))
@@ -163,6 +155,20 @@ def build_mergepot():
     loc.merge_pots_into_pos(op.join('hscommon', 'locale'))
     loc.merge_pots_into_pos(op.join('qtlib', 'locale'))
 
+def build_cocoa_proxy_module():
+    print("Building Cocoa Proxy")
+    import objp.p2o
+    objp.p2o.generate_python_proxy_code('cocoalib/cocoa/CocoaProxy.h', 'build/CocoaProxy.m')
+    exts = [
+        Extension("CocoaProxy", ['cocoalib/cocoa/CocoaProxy.m', 'build/CocoaProxy.m', 'build/ObjP.m'],
+            extra_link_args=["-framework", "CoreFoundation", "-framework", "Foundation", "-framework", "AppKit"]),
+    ]
+    setup(
+        script_args = ['build_ext', '--inplace'],
+        ext_modules = exts,
+    )
+    move_all('CocoaProxy*', 'cocoalib/cocoa')
+
 def build_pe_modules(ui):
     print("Building PE Modules")
     exts = [
diff --git a/cocoa/inter/app.py b/cocoa/inter/app.py
index 90add3ff..f7472bc6 100644
--- a/cocoa/inter/app.py
+++ b/cocoa/inter/app.py
@@ -1,11 +1,9 @@
 import logging
 
 from jobprogress import job
-from hscommon import cocoa
-from hscommon.cocoa import install_exception_hook
-from hscommon.cocoa.inter import signature, subproxy, PyFairware
-from hscommon.cocoa.objcmin import (NSNotificationCenter, NSSearchPathForDirectoriesInDomains,
-    NSApplicationSupportDirectory, NSUserDomainMask, NSWorkspace)
+import cocoa
+from cocoa import install_exception_hook, proxy
+from cocoa.inter import signature, subproxy, PyFairware
 from hscommon.trans import trget
 
 from core.app import JobType
@@ -25,7 +23,7 @@ class PyDupeGuruBase(PyFairware):
     def _init(self, modelclass):
         logging.basicConfig(level=logging.WARNING, format='%(levelname)s %(message)s')
         install_exception_hook()
-        appdata = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, True)[0]
+        appdata = proxy.getAppdataPath()
         self.py = modelclass(self, appdata)
         self.progress = cocoa.ThreadedJobPerformer()
     
@@ -166,10 +164,10 @@ class PyDupeGuruBase(PyFairware):
     
     #--- model --> view
     def open_path(self, path):
-        NSWorkspace.sharedWorkspace().openFile_(str(path))
+        proxy.openPath_(str(path))
     
     def reveal_path(self, path):
-        NSWorkspace.sharedWorkspace().selectFile_inFileViewerRootedAtPath_(str(path), '')
+        proxy.revealPath_(str(path))
     
     def start_job(self, jobid, func, args=()):
         try:
@@ -177,10 +175,10 @@ class PyDupeGuruBase(PyFairware):
             args = tuple([j] + list(args))
             self.progress.run_threaded(func, args=args)
         except job.JobInProgressError:
-            NSNotificationCenter.defaultCenter().postNotificationName_object_('JobInProgress', self)
+            proxy.postNotification_userInfo_('JobInProgress', None)
         else:
             ud = {'desc': JOBID2TITLE[jobid], 'jobid':jobid}
-            NSNotificationCenter.defaultCenter().postNotificationName_object_userInfo_('JobStarted', self, ud)
+            proxy.postNotification_userInfo_('JobStarted', ud)
     
     def show_extra_fairware_reminder(self):
         self.cocoa.showExtraFairwareReminder()
diff --git a/cocoa/inter/app_me.py b/cocoa/inter/app_me.py
index 3e73ee61..f22affb7 100644
--- a/cocoa/inter/app_me.py
+++ b/cocoa/inter/app_me.py
@@ -11,7 +11,7 @@ from appscript import app, k, CommandError
 import time
 import os.path as op
 
-from hscommon.cocoa import as_fetch
+from cocoa import as_fetch
 from hscommon.trans import tr
 
 from core.app import JobType
diff --git a/cocoa/inter/app_pe.py b/cocoa/inter/app_pe.py
index 58671556..51ce2c58 100644
--- a/cocoa/inter/app_pe.py
+++ b/cocoa/inter/app_pe.py
@@ -16,8 +16,8 @@ from appscript import app, its, CommandError, ApplicationNotFoundError
 from hscommon import io
 from hscommon.util import remove_invalid_xml
 from hscommon.path import Path
-from hscommon.cocoa.objcmin import NSUserDefaults, NSURL
 from hscommon.trans import tr
+from cocoa import proxy
 
 from core import directories
 from core_pe import _block_osx
@@ -49,14 +49,11 @@ class IPhoto(Photo):
         return IPHOTO_PATH
     
 def get_iphoto_database_path():
-    ud = NSUserDefaults.standardUserDefaults()
-    prefs = ud.persistentDomainForName_('com.apple.iApps')
-    if prefs is None:
+    plisturls = proxy.prefValue_inDomain_('iPhotoRecentDatabases', 'com.apple.iApps')
+    if not plisturls:
         raise directories.InvalidPathError()
-    if 'iPhotoRecentDatabases' not in prefs:
-        raise directories.InvalidPathError()
-    plisturl = NSURL.URLWithString_(prefs['iPhotoRecentDatabases'][0])
-    return Path(plisturl.path())
+    plistpath = proxy.url2path_(plisturls[0])
+    return Path(plistpath)
 
 def get_iphoto_pictures(plistpath):
     if not io.exists(plistpath):
diff --git a/cocoa/inter/app_se.py b/cocoa/inter/app_se.py
index a7e8e568..c5779c2c 100644
--- a/cocoa/inter/app_se.py
+++ b/cocoa/inter/app_se.py
@@ -11,18 +11,17 @@ import os.path as op
 
 from hscommon import io
 from hscommon.path import Path
-from hscommon.cocoa.objcmin import NSWorkspace
+from cocoa import proxy
 
 from core import fs
 from core.directories import Directories as DirectoriesBase, DirectoryState
 from core_se.app import DupeGuru as DupeGuruBase
 
 def is_bundle(str_path):
-    sw = NSWorkspace.sharedWorkspace()
-    uti, error = sw.typeOfFile_error_(str_path, None)
-    if error is not None:
+    uti = proxy.getUTI_(str_path)
+    if uti is None:
         logging.warning('There was an error trying to detect the UTI of %s', str_path)
-    return sw.type_conformsToType_(uti, 'com.apple.bundle') or sw.type_conformsToType_(uti, 'com.apple.package')
+    return proxy.type_conformsToType_(uti, 'com.apple.bundle') or proxy.type_conformsToType_(uti, 'com.apple.package')
 
 class Bundle(fs.Folder):
     @classmethod
diff --git a/cocoa/inter/details_panel.py b/cocoa/inter/details_panel.py
index e3cfbdb8..1afe4f92 100644
--- a/cocoa/inter/details_panel.py
+++ b/cocoa/inter/details_panel.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import signature, PyGUIObject
+from cocoa.inter import signature, PyGUIObject
 
 from core.gui.details_panel import DetailsPanel
 
diff --git a/cocoa/inter/directory_outline.py b/cocoa/inter/directory_outline.py
index 72d4921c..bdac6a5a 100644
--- a/cocoa/inter/directory_outline.py
+++ b/cocoa/inter/directory_outline.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import PyOutline
+from cocoa.inter import PyOutline
 
 from core.gui.directory_tree import DirectoryTree
 
diff --git a/cocoa/inter/extra_fairware_reminder.py b/cocoa/inter/extra_fairware_reminder.py
index e93533c7..97904b1d 100644
--- a/cocoa/inter/extra_fairware_reminder.py
+++ b/cocoa/inter/extra_fairware_reminder.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import PyGUIObject
+from cocoa.inter import PyGUIObject
 
 from core.gui.extra_fairware_reminder import ExtraFairwareReminder
 
diff --git a/cocoa/inter/prioritize_dialog.py b/cocoa/inter/prioritize_dialog.py
index 0d9852ac..76d140a5 100644
--- a/cocoa/inter/prioritize_dialog.py
+++ b/cocoa/inter/prioritize_dialog.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import PyGUIObject, PySelectableList
+from cocoa.inter import PyGUIObject, PySelectableList
 
 from core.gui.prioritize_dialog import PrioritizeDialog
 from .prioritize_list import PyPrioritizeList
diff --git a/cocoa/inter/prioritize_list.py b/cocoa/inter/prioritize_list.py
index d3d23d84..fd728ad0 100644
--- a/cocoa/inter/prioritize_list.py
+++ b/cocoa/inter/prioritize_list.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import signature, PySelectableList
+from cocoa.inter import signature, PySelectableList
 
 class PyPrioritizeList(PySelectableList):
     @signature('v@:@i')
diff --git a/cocoa/inter/problem_dialog.py b/cocoa/inter/problem_dialog.py
index e96992c5..5eb62364 100644
--- a/cocoa/inter/problem_dialog.py
+++ b/cocoa/inter/problem_dialog.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import PyGUIObject
+from cocoa.inter import PyGUIObject
 
 from core.gui.problem_dialog import ProblemDialog
 
diff --git a/cocoa/inter/problem_table.py b/cocoa/inter/problem_table.py
index ebff3c28..965e1a75 100644
--- a/cocoa/inter/problem_table.py
+++ b/cocoa/inter/problem_table.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import PyTable
+from cocoa.inter import PyTable
 
 from core.gui.problem_table import ProblemTable
 
diff --git a/cocoa/inter/result_table.py b/cocoa/inter/result_table.py
index 620b25e9..ece69101 100644
--- a/cocoa/inter/result_table.py
+++ b/cocoa/inter/result_table.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import signature, PyTable
+from cocoa.inter import signature, PyTable
 
 class PyResultTable(PyTable):
     @signature('c@:')
diff --git a/cocoa/inter/stats_label.py b/cocoa/inter/stats_label.py
index f1976e73..e9fc6905 100644
--- a/cocoa/inter/stats_label.py
+++ b/cocoa/inter/stats_label.py
@@ -1,4 +1,4 @@
-from hscommon.cocoa.inter import PyGUIObject
+from cocoa.inter import PyGUIObject
 
 from core.gui.stats_label import StatsLabel
 
diff --git a/cocoa/me/dg_cocoa.py b/cocoa/me/dg_cocoa.py
index 079b7493..200d5312 100644
--- a/cocoa/me/dg_cocoa.py
+++ b/cocoa/me/dg_cocoa.py
@@ -7,7 +7,7 @@
 from hscommon.trans import install_gettext_trans_under_cocoa
 install_gettext_trans_under_cocoa()
 
-from hscommon.cocoa import signature
+from cocoa.inter import signature
 
 from core.scanner import ScanType
 
diff --git a/cocoa/se/dg_cocoa.py b/cocoa/se/dg_cocoa.py
index 0150a7a2..3f71c71a 100644
--- a/cocoa/se/dg_cocoa.py
+++ b/cocoa/se/dg_cocoa.py
@@ -7,7 +7,7 @@
 from hscommon.trans import install_gettext_trans_under_cocoa
 install_gettext_trans_under_cocoa()
 
-from hscommon.cocoa import signature
+from cocoa.inter import signature
 
 from core.scanner import ScanType
 
diff --git a/requirements-osx.txt b/requirements-osx.txt
index d6e23720..8e84104c 100644
--- a/requirements-osx.txt
+++ b/requirements-osx.txt
@@ -1,4 +1,5 @@
 -r requirements.txt
 pyobjc-core>=2.3
 pluginbuilder>=1.0.0
-appscript>=1.0.0
\ No newline at end of file
+appscript>=1.0.0
+objp>=0.1.0
\ No newline at end of file