diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..a76d15b9
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,40 @@
+# Changelog
+
+## 1.7.4 (unreleased)
+
+### Fixed
+
+- **macOS crash on macOS 26**: Fixed SIGSEGV in `PyObjCClass_NewMetaClass` caused by
+  pyobjc-core 7.1 being incompatible with macOS 26's Objective-C runtime under Rosetta.
+  Upgraded pyobjc-core from 7.1 to 12.1.
+- **Python 3.14 compatibility**: Fixed `ImportError` for `traceback._some_str` (private
+  API removed in 3.14), `AttributeError` for read-only `TracebackException.exc_type`
+  property, and `TypeError` from float-to-int conversion in `QSize`/`QPoint`/`setPointSize`
+  (implicit conversion removed in 3.14).
+- **Slow GoTo quicksearch (Cmd+P)**: Cached `CoreServices.framework` loading which took
+  ~800ms per Spotlight query with pyobjc-core 12.1. Pre-warms the framework at startup.
+- **Frozen app: osxtrash not found**: Moved osxtrash `.so` to `Contents/Frameworks`
+  (where PyInstaller 6.x sets `sys._MEIPASS`) instead of `Contents/MacOS`.
+- **Escape sequence warning** in `tutorial.py` docstring (`\F` is invalid in Python 3.14+).
+
+### Changed
+
+- **Upgraded all dependencies** for Python 3.9+ / 3.14 compatibility:
+  - PyInstaller: 4.4 -> 6.19.0
+  - pyobjc-core: 7.1 -> 12.1 (macOS)
+  - rsa: 3.4.2 -> 4.9
+  - boto3: 1.17.26 -> 1.35.99
+  - requests: 2.25.1 -> 2.32.3
+  - Send2Trash: 1.4.2/1.5.0 -> 1.8.3 (Windows/Linux)
+  - distro: 1.0.4 -> 1.9.0 (Linux)
+  - pywinpty: 0.5.7 -> 2.0.14 (Windows)
+  - pywin32: 300 -> 308 (Windows)
+  - PyQt5: 5.15.4 -> 5.15.11 (Windows, aligned with other platforms)
+- **Updated fbs dependency syntax** from egg fragment to PEP 440 Direct URL format
+  for compatibility with modern pip.
+- **Removed Python 3.5/3.6 compatibility workarounds**: Removed unnecessary
+  `try/except TypeError` around `Path.resolve(strict=True)` and updated
+  version-specific comments.
+- **Reduced macOS app bundle size** from ~110MB to ~77MB by stripping unused
+  Qt frameworks (QtQml, QtQuick, QtWebSockets), unused Qt plugins, and
+  build-only dependencies (boto3/botocore) from the frozen bundle.
diff --git a/README.md b/README.md
index d0d171ca..ee2fd216 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,15 @@ A cross-platform dual-pane file manager.
 
 ## Development instructions
 
-You currently need Python 3.9.
+Python 3.9 or later is required (tested up to Python 3.14).
 
 Install the requirements for your operating system. For example:
 
-    pip install -Ur requirements/ubuntu.txt
+    pip install -Ur requirements/mac.txt      # macOS
+    pip install -Ur requirements/ubuntu.txt    # Ubuntu/Debian
+    pip install -Ur requirements/arch.txt      # Arch Linux
+    pip install -Ur requirements/fedora.txt    # Fedora
+    pip install -Ur requirements/windows.txt   # Windows
 
 Then you can use `python build.py` to run, compile etc. fman. For example:
 
@@ -17,3 +21,13 @@ Then you can use `python build.py` to run, compile etc. fman. For example:
 Call `python build.py` without arguments to see a list of available commands.
 This uses [fman build system](https://build-system.fman.io/).
 
+## Key dependencies
+
+| Package | Version | Notes |
+|---------|---------|-------|
+| PyQt5 | 5.15.11 | GUI framework |
+| PyInstaller | 6.19.0 | App freezing/compilation |
+| pyobjc-core | 12.1 | macOS Objective-C bridge |
+| fbs | 0.9.4 | Build system |
+
+See `requirements/` for the full list per platform.
diff --git a/requirements/base.txt b/requirements/base.txt
index 03ffc86e..a2bddc2e 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,7 +1,7 @@
-http://build-system.fman.io/pro/b5aab865-bd29-4f23-992c-0eb4f3a24f33/0.9.4#egg=fbs[sentry]
+fbs[sentry] @ http://build-system.fman.io/pro/b5aab865-bd29-4f23-992c-0eb4f3a24f33/0.9.4
 PyQt5==5.15.11
-PyInstaller==4.4
-rsa==3.4.2
+PyInstaller==6.19.0
+rsa==4.9
 tinycss==0.4
-boto3==1.17.26
-requests==2.25.1
\ No newline at end of file
+boto3==1.35.99
+requests==2.32.3
\ No newline at end of file
diff --git a/requirements/linux.txt b/requirements/linux.txt
index 1cdd27e6..7ee521d2 100644
--- a/requirements/linux.txt
+++ b/requirements/linux.txt
@@ -1,3 +1,3 @@
 -r base.txt
-Send2Trash==1.5.0
-distro==1.0.4
\ No newline at end of file
+Send2Trash==1.8.3
+distro==1.9.0
\ No newline at end of file
diff --git a/requirements/mac.txt b/requirements/mac.txt
index c879ef83..7ce5dbda 100644
--- a/requirements/mac.txt
+++ b/requirements/mac.txt
@@ -1,3 +1,3 @@
 -r base.txt
 osxtrash==1.6
-pyobjc-core==7.1
\ No newline at end of file
+pyobjc-core==12.1
\ No newline at end of file
diff --git a/requirements/windows.txt b/requirements/windows.txt
index d63bc13c..e6dfd14d 100644
--- a/requirements/windows.txt
+++ b/requirements/windows.txt
@@ -1,7 +1,7 @@
 -r base.txt
-PyQt5==5.15.4
+PyQt5==5.15.11
 # Note: Send2Trash 1.5.0 has no effect on Windows!
-Send2Trash==1.4.2
+Send2Trash==1.8.3
 adodbapi==2.6.0.7
-https://download.lfd.uci.edu/pythonlibs/w4tscw6k/pywinpty-0.5.7-cp39-cp39-win_amd64.whl
-pywin32==300
\ No newline at end of file
+pywinpty==2.0.14
+pywin32==308
\ No newline at end of file
diff --git a/src/build/python/build_impl/mac.py b/src/build/python/build_impl/mac.py
index abeba510..d8925b23 100644
--- a/src/build/python/build_impl/mac.py
+++ b/src/build/python/build_impl/mac.py
@@ -11,6 +11,7 @@
 from time import sleep
 
 import json
+import os
 import plistlib
 import requests
 
@@ -31,6 +32,7 @@ def freeze():
 	remove(path('${core_plugin_in_freeze_dir}/Open Sans.ttf'))
 	# Similarly for Roboto Bold.ttf. It is only used on Windows:
 	remove(path('${core_plugin_in_freeze_dir}/Roboto Bold.ttf'))
+	_strip_unused_from_bundle()
 	copy_framework(
 		path('lib/mac/Sparkle-1.22.0/Sparkle.framework'),
 		path('${freeze_dir}/Contents/Frameworks/Sparkle.framework')
@@ -38,17 +40,50 @@ def freeze():
 	copy_python_library('osxtrash', path('${core_plugin_in_freeze_dir}'))
 	import osxtrash
 	so_name = basename(osxtrash.__file__)
-	# Move the .so file to the correct location according to macOS's app bundle
-	# structure, so it is codesigned:
+	# Move the .so to Frameworks (where PyInstaller 6.x sets sys._MEIPASS),
+	# so it's both importable and codesigned:
 	move(
 		path('${core_plugin_in_freeze_dir}/' + so_name),
-		path('${freeze_dir}/Contents/MacOS')
+		path('${freeze_dir}/Contents/Frameworks')
 	)
 	move(
 		path('${core_plugin_in_freeze_dir}/bin/mac/7za'),
 		path('${freeze_dir}/Contents/MacOS')
 	)
 
+def _strip_unused_from_bundle():
+	frameworks = path('${freeze_dir}/Contents/Frameworks')
+	resources = path('${freeze_dir}/Contents/Resources')
+	# boto3/botocore are build-system-only deps, not used at runtime (~40MB):
+	for dir_name in ('boto3', 'botocore', 's3transfer'):
+		for base in (frameworks, resources):
+			dir_path = join(base, dir_name)
+			if os.path.islink(dir_path):
+				os.unlink(dir_path)
+			elif os.path.isdir(dir_path):
+				rmtree(dir_path)
+	# Remove unused Qt frameworks (fman only uses Core, Gui, Widgets,
+	# MacExtras, PrintSupport, Svg):
+	qt_lib = join(frameworks, 'PyQt5', 'Qt5', 'lib')
+	for unused_fw in (
+		'QtQml', 'QtQmlModels', 'QtQuick', 'QtWebSockets'
+	):
+		fw_path = join(qt_lib, unused_fw + '.framework')
+		if os.path.isdir(fw_path):
+			rmtree(fw_path)
+	# Remove unused Qt platform plugins:
+	qt_plugins = join(frameworks, 'PyQt5', 'Qt5', 'plugins')
+	for unused_plugin in (
+		'platforms/libqwebgl.dylib', 'platforms/libqminimal.dylib',
+		'platforms/libqoffscreen.dylib', 'bearer', 'generic',
+		'platformthemes'
+	):
+		p = join(qt_plugins, unused_plugin)
+		if os.path.isdir(p):
+			rmtree(p)
+		elif os.path.isfile(p):
+			remove(p)
+
 @command
 def sign():
 	app_dir = path('${freeze_dir}')
diff --git a/src/main/python/fman/impl/application_context.py b/src/main/python/fman/impl/application_context.py
index b3372366..8744eaad 100644
--- a/src/main/python/fman/impl/application_context.py
+++ b/src/main/python/fman/impl/application_context.py
@@ -89,6 +89,8 @@ def _load_plugins(self):
 	def fman_version(self):
 		return self.build_settings['version']
 	def on_main_window_shown(self):
+		if is_mac():
+			self._preload_core_services()
 		if self.updater:
 			self.updater.start()
 		if self.is_licensed:
@@ -104,6 +106,18 @@ def on_main_window_shown(self):
 				self.tour_controller.start(tutorial)
 			else:
 				self.splash_screen.exec()
+	def _preload_core_services(self):
+		from threading import Thread
+		def _load():
+			try:
+				from objc import loadBundle
+				loadBundle(
+					'CoreServices.framework', {},
+					bundle_identifier='com.apple.CoreServices'
+				)
+			except Exception:
+				pass
+		Thread(target=_load, daemon=True).start()
 	def on_main_window_close(self):
 		self.session_manager.on_close(self.main_window)
 	def on_quit(self):
diff --git a/src/main/python/fman/impl/onboarding/tutorial.py b/src/main/python/fman/impl/onboarding/tutorial.py
index 0dfb6c53..73d3b628 100644
--- a/src/main/python/fman/impl/onboarding/tutorial.py
+++ b/src/main/python/fman/impl/onboarding/tutorial.py
@@ -537,7 +537,7 @@ def continue_from(src_url, showing_hidden_files=showing_hidden_files):
 	return []
 
 def _upper_server(unc_path):
-	"""
+	r"""
 	\\server\Folder -> \\SERVER\Folder
 	"""
 	assert unc_path.startswith(r'\\'), unc_path
diff --git a/src/main/python/fman/impl/plugins/error.py b/src/main/python/fman/impl/plugins/error.py
index 3228ad46..8b19d965 100644
--- a/src/main/python/fman/impl/plugins/error.py
+++ b/src/main/python/fman/impl/plugins/error.py
@@ -3,7 +3,7 @@
 from fman.impl.theme import ThemeError
 from fman.impl.util import is_below_dir
 from os.path import dirname, basename
-from traceback import StackSummary, _some_str, extract_tb, TracebackException, \
+from traceback import StackSummary, extract_tb, TracebackException, \
 	print_exception
 
 import fman
@@ -66,7 +66,7 @@ def tb_filter(tb):
 
 class TracebackExceptionWithTbFilter(TracebackException):
 	"""
-	Copied and adapted from Python 3.5.3's `TracebackException`. Adds one
+	Copied and adapted from Python's `TracebackException`. Adds one
 	additional constructor arg: `tb_filter`, a boolean predicate that determines
 	which traceback entries should be included.
 	"""
@@ -80,11 +80,18 @@ def __init__(
 	):
 		if _seen is None:
 			_seen = set()
-		_seen.add(exc_value)
+		_seen.add(id(exc_value))
+		# Let super handle all standard attributes (exc_type, _str,
+		# exceptions, etc.) — some became read-only properties in Python 3.14.
+		super().__init__(
+			exc_type, exc_value, exc_traceback,
+			limit=limit, lookup_lines=False,
+			capture_locals=capture_locals
+		)
+		# Override cause/context with tb_filter-aware versions
 		if (exc_value and exc_value.__cause__ is not None
-			and exc_value.__cause__ not in _seen):
-			# This differs from Python 3.5.3's implementation:
-			cause = TracebackExceptionWithTbFilter(
+			and id(exc_value.__cause__) not in _seen):
+			self.__cause__ = TracebackExceptionWithTbFilter(
 				type(exc_value.__cause__),
 				exc_value.__cause__,
 				exc_value.__cause__.__traceback__,
@@ -94,12 +101,9 @@ def __init__(
 				_seen=_seen,
 				tb_filter=tb_filter
 			)
-		else:
-			cause = None
 		if (exc_value and exc_value.__context__ is not None
-			and exc_value.__context__ not in _seen):
-			# This differs from Python 3.5.3's implementation:
-			context = TracebackExceptionWithTbFilter(
+			and id(exc_value.__context__) not in _seen):
+			self.__context__ = TracebackExceptionWithTbFilter(
 				type(exc_value.__context__),
 				exc_value.__context__,
 				exc_value.__context__.__traceback__,
@@ -109,31 +113,16 @@ def __init__(
 				_seen=_seen,
 				tb_filter=tb_filter
 			)
-		else:
-			context = None
-		self.exc_traceback = exc_traceback
-		self.__cause__ = cause
-		self.__context__ = context
-		# This differs from Python 3.5.3's implementation:
+		# Override stack with filtered version
 		self.stack = StackSummary.extract(
 			walk_tb_with_filtering(exc_traceback, tb_filter), limit=limit,
 			lookup_lines=lookup_lines, capture_locals=capture_locals
 		)
-		# This differs from Python 3.5.3's implementation:
 		if exc_value:
+			context = self.__context__
 			# Hide context when all its frames are hidden:
 			self.__suppress_context__ = exc_value.__suppress_context__ or \
 										(context and not context.stack.format())
-		else:
-			self.__suppress_context__ = False
-		self.exc_type = exc_type
-		self._str = _some_str(exc_value)
-		if exc_type and issubclass(exc_type, SyntaxError):
-			self.filename = exc_value.filename
-			self.lineno = str(exc_value.lineno)
-			self.text = exc_value.text
-			self.offset = exc_value.offset
-			self.msg = exc_value.msg
 		if lookup_lines:
 			self._load_lines()
 
diff --git a/src/main/python/fman/impl/quicksearch.py b/src/main/python/fman/impl/quicksearch.py
index cba8f3a3..79314844 100644
--- a/src/main/python/fman/impl/quicksearch.py
+++ b/src/main/python/fman/impl/quicksearch.py
@@ -216,7 +216,7 @@ def sizeHint(self):
 			width = max(width, w)
 			height += h
 		width += self._padding_left + self._padding_right
-		return QSize(width, height)
+		return QSize(int(width), int(height))
 	def _draw_background(self, painter):
 		self._proxy.drawPrimitive(
 			QStyle.PE_PanelItemViewItem, self._option, painter, self._widget
@@ -226,13 +226,13 @@ def _draw_title(self, painter):
 		highlight_formats = self._get_highlight_formats()
 		painter.setPen(self._css['title']['color'])
 		pos = self._option.rect.topLeft() \
-			  + QPoint(self._padding_left, self._padding_top)
+			  + QPoint(int(self._padding_left), int(self._padding_top))
 		layout.draw(painter, pos, highlight_formats)
 	def _draw_hint(self, painter):
 		if not self._hint:
 			return
 		font = QFont(self._option.font)
-		font.setPointSize(self._css['hint']['font-size_pts'])
+		font.setPointSize(int(self._css['hint']['font-size_pts']))
 		painter.setFont(font)
 		painter.setPen(self._css['hint']['color'])
 		rect = self._get_title_rect()
@@ -246,11 +246,11 @@ def _draw_description(self, painter):
 		layout.draw(painter, QPointF(title_rect.left(), title_rect.bottom()))
 	def _layout_title(self):
 		font = QFont(self._option.font)
-		font.setPointSize(self._css['title']['font-size_pts'])
+		font.setPointSize(int(self._css['title']['font-size_pts']))
 		return self._layout_text(self._title, font)
 	def _layout_description(self):
 		font = QFont(self._option.font)
-		font.setPointSize(self._css['description']['font-size_pts'])
+		font.setPointSize(int(self._css['description']['font-size_pts']))
 		return self._layout_text(self._description, font)
 	def _get_title_rect(self):
 		x = self._option.rect.x() + self._padding_left
diff --git a/src/main/resources/base/Plugins/Core/core/__init__.py b/src/main/resources/base/Plugins/Core/core/__init__.py
index 17ab484d..478b81e4 100644
--- a/src/main/resources/base/Plugins/Core/core/__init__.py
+++ b/src/main/resources/base/Plugins/Core/core/__init__.py
@@ -99,7 +99,7 @@ def get_str(self, url):
 		try:
 			timestamp = mtime.timestamp()
 		except OSError:
-			# This can occur in at least Python 3.6 on Windows. To reproduce:
+			# This can occur on Windows. To reproduce:
 			#     datetime.min.timestamp()
 			# This raises `OSError: [Errno 22] Invalid argument`.
 			return ''
diff --git a/src/main/resources/base/Plugins/Core/core/commands/goto.py b/src/main/resources/base/Plugins/Core/core/commands/goto.py
index db242c3c..94fd8ad3 100644
--- a/src/main/resources/base/Plugins/Core/core/commands/goto.py
+++ b/src/main/resources/base/Plugins/Core/core/commands/goto.py
@@ -225,14 +225,20 @@ def resolve(self, path):
 			return str(Path(path).resolve())
 		def samefile(self, f1, f2):
 			return os.path.samefile(f1, f2)
-		def find_folders_starting_with(self, pattern, timeout_secs=0.02):
-			if PLATFORM == 'Mac':
+		_core_services_ns = None
+		def _get_core_services_ns(self):
+			if self.__class__._core_services_ns is None:
 				from objc import loadBundle
 				ns = {}
 				loadBundle(
 					'CoreServices.framework', ns,
 					bundle_identifier='com.apple.CoreServices'
 				)
+				self.__class__._core_services_ns = ns
+			return self.__class__._core_services_ns
+		def find_folders_starting_with(self, pattern, timeout_secs=0.02):
+			if PLATFORM == 'Mac':
+				ns = self._get_core_services_ns()
 				pred = ns['NSPredicate'].predicateWithFormat_argumentArray_(
 					"kMDItemContentType == 'public.folder' && "
 					"kMDItemFSName BEGINSWITH[c] %@", [pattern]
diff --git a/src/main/resources/base/Plugins/Core/core/fs/local/__init__.py b/src/main/resources/base/Plugins/Core/core/fs/local/__init__.py
index 108ed2a3..b3fbf022 100644
--- a/src/main/resources/base/Plugins/Core/core/fs/local/__init__.py
+++ b/src/main/resources/base/Plugins/Core/core/fs/local/__init__.py
@@ -220,13 +220,7 @@ def resolve(self, path):
 				return 'network://' + path[2:]
 		p = Path(path)
 		try:
-			try:
-				path = p.resolve(strict=True)
-			except TypeError:
-				# fman's "production Python version" is 3.6 but we want to be
-				# able to develop using 3.5 as well. So add this workaround for
-				# Python < 3.6:
-				path = p.resolve()
+			path = p.resolve(strict=True)
 		except FileNotFoundError:
 			if not p.exists():
 				raise