diff --git a/ui/emoji_config.cpp b/ui/emoji_config.cpp
index 6680854..148feeb 100644
--- a/ui/emoji_config.cpp
+++ b/ui/emoji_config.cpp
@@ -35,7 +35,7 @@ constexpr auto kSetVersion = uint32(2);
 constexpr auto kCacheVersion = uint32(6);
 constexpr auto kMaxId = uint32(1 << 8);
 
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 constexpr auto kScaleForTouchBar = 150;
 #endif
 
@@ -80,7 +80,7 @@ auto CanClearUniversal = false;
 auto WaitingToSwitchBackToId = 0;
 auto Updates = rpl::event_stream<>();
 
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 auto TouchbarSize = -1;
 auto TouchbarInstance = std::unique_ptr<Instance>();
 auto TouchbarEmoji = (Instance*)nullptr;
@@ -498,7 +498,7 @@ void Init() {
 	InstanceNormal = std::make_unique<Instance>(SizeNormal);
 	InstanceLarge = std::make_unique<Instance>(SizeLarge);
 
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 	if (style::Scale() != kScaleForTouchBar) {
 		TouchbarSize = int(style::ConvertScale(18 * 4 / 3.,
 			kScaleForTouchBar * style::DevicePixelRatio()));
@@ -516,7 +516,7 @@ void Clear() {
 
 	InstanceNormal = nullptr;
 	InstanceLarge = nullptr;
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 	TouchbarInstance = nullptr;
 	TouchbarEmoji = nullptr;
 #endif
@@ -620,7 +620,7 @@ int GetSizeLarge() {
 	return SizeLarge;
 }
 
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 int GetSizeTouchbar() {
 	return (style::Scale() == kScaleForTouchBar)
 		? GetSizeLarge()
@@ -763,7 +763,7 @@ const QPixmap &SinglePixmap(EmojiPtr emoji, int fontHeight) {
 }
 
 void Draw(QPainter &p, EmojiPtr emoji, int size, int x, int y) {
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 	const auto s = (style::Scale() == kScaleForTouchBar)
 		? SizeLarge
 		: TouchbarSize;
diff --git a/ui/emoji_config.h b/ui/emoji_config.h
index 75f10e1..3183258 100644
--- a/ui/emoji_config.h
+++ b/ui/emoji_config.h
@@ -40,7 +40,7 @@ void ClearNeedSwitchToId();
 
 [[nodiscard]] int GetSizeNormal();
 [[nodiscard]] int GetSizeLarge();
-#if defined Q_OS_MAC && !defined OS_MAC_OLD
+#ifdef Q_OS_MAC
 [[nodiscard]] int GetSizeTouchbar();
 #endif
 
diff --git a/ui/style/style_core.cpp b/ui/style/style_core.cpp
index 9914e50..48d1dd4 100644
--- a/ui/style/style_core.cpp
+++ b/ui/style/style_core.cpp
@@ -144,11 +144,7 @@ namespace internal {
 
 QImage createCircleMask(int size, QColor bg, QColor fg) {
 	int realSize = size * DevicePixelRatio();
-#ifndef OS_MAC_OLD
 	auto result = QImage(realSize, realSize, QImage::Format::Format_Grayscale8);
-#else // OS_MAC_OLD
-	auto result = QImage(realSize, realSize, QImage::Format::Format_RGB32);
-#endif // OS_MAC_OLD
 	{
 		QPainter p(&result);
 		PainterHighQualityEnabler hq(p);
diff --git a/ui/text/text.cpp b/ui/text/text.cpp
index 95e22f9..6db3e73 100644
--- a/ui/text/text.cpp
+++ b/ui/text/text.cpp
@@ -134,14 +134,7 @@ bool IsBad(QChar ch) {
 		|| (ch >= 127 && ch < 160 && ch != 156)
 
 		// qt harfbuzz crash see https://github.com/telegramdesktop/tdesktop/issues/4551
-		|| (Platform::IsMac() && ch == 6158)
-
-		// tmp hack see https://bugreports.qt.io/browse/QTBUG-48910
-		|| (Platform::IsMac10_11OrGreater()
-			&& !Platform::IsMac10_12OrGreater()
-			&& ch >= 0x0B00
-			&& ch <= 0x0B7F
-			&& IsDiac(ch));
+		|| (Platform::IsMac() && ch == 6158);
 }
 
 } // namespace
@@ -1982,12 +1975,7 @@ private:
 		if (item == -1)
 			return;
 
-#ifdef OS_MAC_OLD
-		auto end = _e->findItem(line.from + line.length - 1);
-#else // OS_MAC_OLD
 		auto end = _e->findItem(line.from + line.length - 1, item);
-#endif // OS_MAC_OLD
-
 		auto blockIndex = _lineStartBlock;
 		auto currentBlock = _t->_blocks[blockIndex].get();
 		auto nextBlock = (++blockIndex < _blocksSize) ? _t->_blocks[blockIndex].get() : nullptr;
diff --git a/ui/text/text_entity.cpp b/ui/text/text_entity.cpp
index b535f4e..cd4453e 100644
--- a/ui/text/text_entity.cpp
+++ b/ui/text/text_entity.cpp
@@ -88,9 +88,7 @@ QRegularExpression CreateRegExp(const QString &expression) {
 	auto result = QRegularExpression(
 		expression,
 		QRegularExpression::UseUnicodePropertiesOption);
-#ifndef OS_MAC_OLD
 	result.optimize();
-#endif // OS_MAC_OLD
 	return result;
 }
 
diff --git a/ui/ui_utility.cpp b/ui/ui_utility.cpp
index f37e607..7e5b7d8 100644
--- a/ui/ui_utility.cpp
+++ b/ui/ui_utility.cpp
@@ -169,9 +169,7 @@ void SendSynteticMouseEvent(QWidget *widget, QEvent::Type type, Qt::MouseButton
 			, button
 			, QGuiApplication::mouseButtons() | button
 			, QGuiApplication::keyboardModifiers()
-#ifndef OS_MAC_OLD
 			, Qt::MouseEventSynthesizedByApplication
-#endif // OS_MAC_OLD
 		);
 		ev.setTimestamp(crl::now());
 		QGuiApplication::sendEvent(windowHandle, &ev);