diff --git a/bypy/macos/__main__.py b/bypy/macos/__main__.py
index c55c9760b0..e0644cb2ea 100644
--- a/bypy/macos/__main__.py
+++ b/bypy/macos/__main__.py
@@ -22,7 +22,6 @@ from itertools import repeat
 from bypy.constants import OUTPUT_DIR, PREFIX, PYTHON, python_major_minor_version
 from bypy.constants import SRC as CALIBRE_DIR
 from bypy.freeze import extract_extension_modules, fix_pycryptodome, freeze_python, is_package_dir, path_to_freeze_dir
-from bypy.pkgs.piper import copy_piper_dir
 from bypy.utils import current_dir, get_arches_in_binary, mkdtemp, py_compile, timeit, walk
 
 abspath, join, basename, dirname = os.path.abspath, os.path.join, os.path.basename, os.path.dirname
@@ -542,7 +541,7 @@ class Freeze:
             'icudata.73', 'icui18n.73', 'icuio.73', 'icuuc.73', 'hyphen.0', 'uchardet.0',
             'stemmer.0', 'xslt.1', 'exslt.0', 'xml2.2', 'z.1', 'unrar', 'lzma.5',
             'brotlicommon.1', 'brotlidec.1', 'brotlienc.1', 'zstd.1', 'jbig.2.1', 'tiff.6',
-            'crypto.3', 'ssl.3', 'iconv.2',  # 'ltdl.7'
+            'crypto.3', 'ssl.3', 'iconv.2', 'espeak-ng.1', 'onnxruntime.1.22.1',  # 'ltdl.7'
         ):
             x = 'lib%s.dylib' % x
             src = join(PREFIX, 'lib', x)
@@ -557,8 +556,8 @@ class Freeze:
                     dylib = join(dest, dylib)
                     self.set_id(dylib, self.FID + '/' + x + '/' + os.path.basename(dylib))
                     self.fix_dependencies_in_lib(dylib)
-        # Piper TTS
-        copy_piper_dir(PREFIX, self.frameworks_dir)
+        # espeak voices used for piper phonemization
+        shutil.copytree(join(PREFIX, 'share', 'espeak-ng-data'), join(self.resources_dir, 'espeak-ng-data'))
 
     @flush
     def add_site_packages(self):
diff --git a/setup/build_environment.py b/setup/build_environment.py
index 7ea56c685e..a0fd7f2dd2 100644
--- a/setup/build_environment.py
+++ b/setup/build_environment.py
@@ -200,6 +200,9 @@ elif ismacos:
     openssl_lib_dirs = [os.path.join(SSL, 'lib')]
     if os.path.exists(os.path.join(sw_bin_dir, 'cmake')):
         CMAKE = os.path.join(sw_bin_dir, 'cmake')
+    piper_inc_dirs = [sw_inc_dir, os.path.join(sw_inc_dir, 'onnxruntime')]
+    piper_lib_dirs = [sw_lib_dir]
+    piper_libs = ['espeak-ng', 'onnxruntime']
 else:
     freetype_inc_dirs = pkgconfig_include_dirs('freetype2', 'FT_INC_DIR',
             '/usr/include/freetype2')
diff --git a/src/calibre/utils/tts/piper.py b/src/calibre/utils/tts/piper.py
index 60acdc6829..74291238c8 100644
--- a/src/calibre/utils/tts/piper.py
+++ b/src/calibre/utils/tts/piper.py
@@ -12,7 +12,7 @@ from threading import Lock, Thread
 from typing import Any, NamedTuple
 
 import calibre_extensions.piper as piper
-from calibre.constants import iswindows
+from calibre.constants import ismacos, iswindows
 
 DEFAULT_LENGTH_SCALE = 1.0
 DEFAULT_NOISE_SCALE = 0.667
@@ -64,6 +64,8 @@ def espeak_data_dir() -> str:
         return ''
     if iswindows:
         return os.path.join(os.path.dirname(sys.executables_location), 'share', 'espeak-ng-data')
+    if ismacos:
+        return os.path.join(os.path.dirname(sys.frameworks_dir), 'Resources', 'espeak-ng-data')
     return os.path.join(sys.executables_location, 'share', 'espeak-ng-data')