diff --git a/Telegram/SourceFiles/core/utils.cpp b/Telegram/SourceFiles/core/utils.cpp
index 0daea75a1c..54ded4de8f 100644
--- a/Telegram/SourceFiles/core/utils.cpp
+++ b/Telegram/SourceFiles/core/utils.cpp
@@ -392,7 +392,6 @@ namespace ThirdParty {
 			} else {
 				LOG(("MTP Error: Could not init OpenSSL threads, CRYPTO_num_locks() returned zero!"));
 			}
-			CRYPTO_THREADID_set_callback(_sslThreadId);
 		}
 		if (!CRYPTO_get_dynlock_create_callback()) {
 			CRYPTO_set_dynlock_create_callback(_sslCreateFunction);
@@ -419,9 +418,7 @@ namespace ThirdParty {
 #endif
 		ENGINE_cleanup();
 		CONF_modules_unload(1);
-		ERR_remove_state(0);
 		ERR_free_strings();
-		ERR_remove_thread_state(nullptr);
 		EVP_cleanup();
 
 		delete[] base::take(_sslLocks);
diff --git a/Telegram/SourceFiles/ffmpeg/ffmpeg_utility.cpp b/Telegram/SourceFiles/ffmpeg/ffmpeg_utility.cpp
index 3775f7503b..85347c75bb 100644
--- a/Telegram/SourceFiles/ffmpeg/ffmpeg_utility.cpp
+++ b/Telegram/SourceFiles/ffmpeg/ffmpeg_utility.cpp
@@ -48,7 +48,7 @@ void AlignedImageBufferCleanupHandler(void* data) {
 }
 
 void UnPremultiplyLine(uchar *dst, const uchar *src, int intsCount) {
-#ifdef TDESKTOP_OFFICIAL_TARGET
+#ifndef TDESKTOP_OFFICIAL_TARGET // #TODO 5.12.5
 	const auto layout = &qPixelLayouts[QImage::Format_ARGB32];
 	const auto convert = layout->convertFromARGB32PM;
 #else // TDESKTOP_OFFICIAL_TARGET
@@ -74,7 +74,7 @@ void UnPremultiplyLine(uchar *dst, const uchar *src, int intsCount) {
 }
 
 void PremultiplyLine(uchar *dst, const uchar *src, int intsCount) {
-#ifdef TDESKTOP_OFFICIAL_TARGET
+#ifndef TDESKTOP_OFFICIAL_TARGET // #TODO 5.12.5
 	const auto layout = &qPixelLayouts[QImage::Format_ARGB32];
 	const auto convert = layout->convertToARGB32PM;
 #else // TDESKTOP_OFFICIAL_TARGET
diff --git a/Telegram/SourceFiles/mainwindow.cpp b/Telegram/SourceFiles/mainwindow.cpp
index b6d9734de5..ef8fcf6dbf 100644
--- a/Telegram/SourceFiles/mainwindow.cpp
+++ b/Telegram/SourceFiles/mainwindow.cpp
@@ -578,7 +578,7 @@ void MainWindow::updateTrayMenu(bool force) {
 
 		// On macOS just remove trayIcon menu if the window is not active.
 		// So we will activate the window on click instead of showing the menu.
-		if (!active && Platform::IsMac()) {
+		if (!active && Platform::IsMac() && false) { // #TODO 5.12.5
 			iconMenu = nullptr;
 		}
 	}
diff --git a/Telegram/SourceFiles/mtproto/core_types.h b/Telegram/SourceFiles/mtproto/core_types.h
index 9b8d8e8ecb..7eebb91726 100644
--- a/Telegram/SourceFiles/mtproto/core_types.h
+++ b/Telegram/SourceFiles/mtproto/core_types.h
@@ -14,6 +14,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/algorithm.h"
 #include "base/assertion.h"
 #include "tl/tl_basic_types.h"
+#include "tl/tl_boxed.h"
 
 #include <QtCore/QVector>
 #include <QtCore/QString>
diff --git a/Telegram/SourceFiles/platform/mac/specific_mac_p.mm b/Telegram/SourceFiles/platform/mac/specific_mac_p.mm
index 82805bf8ec..824bec2f61 100644
--- a/Telegram/SourceFiles/platform/mac/specific_mac_p.mm
+++ b/Telegram/SourceFiles/platform/mac/specific_mac_p.mm
@@ -25,6 +25,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include <QtGui/QWindow>
 #include <QtWidgets/QApplication>
+#include <QtCore/QOperatingSystemVersion>
 
 #include <Cocoa/Cocoa.h>
 #include <CoreFoundation/CFURL.h>
@@ -284,6 +285,15 @@ void objc_outputDebugString(const QString &str) {
 }
 
 void objc_start() {
+	// Patch: Fix macOS regression. On 10.14.4, it crashes on GPU switches.
+	// See https://bugreports.qt.io/browse/QTCREATORBUG-22215
+	const auto version = QOperatingSystemVersion::current();
+	if (version.majorVersion() == 10
+		&& version.minorVersion() == 14
+		&& version.microVersion() == 4) {
+		qputenv("QT_MAC_PRO_WEBENGINE_WORKAROUND", "1");
+	}
+
 	_sharedDelegate = [[ApplicationDelegate alloc] init];
 	[[NSApplication sharedApplication] setDelegate:_sharedDelegate];
 	[[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: _sharedDelegate
diff --git a/Telegram/SourceFiles/platform/win/file_utilities_win.cpp b/Telegram/SourceFiles/platform/win/file_utilities_win.cpp
index 5c3b13ba74..d8ebc80cea 100644
--- a/Telegram/SourceFiles/platform/win/file_utilities_win.cpp
+++ b/Telegram/SourceFiles/platform/win/file_utilities_win.cpp
@@ -421,9 +421,9 @@ bool Get(
 		} else {
 			files = dialog.selectedFiles().mid(0, 1);
 		}
-		if (type == Type::ReadFile || type == Type::ReadFiles) {
-			remoteContent = dialog.selectedRemoteContent();
-		}
+		//if (type == Type::ReadFile || type == Type::ReadFiles) {
+		//	remoteContent = dialog.selectedRemoteContent();
+		//}
 		return true;
 	}
 
diff --git a/Telegram/SourceFiles/qt_static_plugins.cpp b/Telegram/SourceFiles/qt_static_plugins.cpp
index a757d085f9..a33f12701e 100644
--- a/Telegram/SourceFiles/qt_static_plugins.cpp
+++ b/Telegram/SourceFiles/qt_static_plugins.cpp
@@ -7,15 +7,15 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include <QtCore/QtPlugin>
 
-#ifdef Q_OS_WIN
 Q_IMPORT_PLUGIN(QWebpPlugin)
+Q_IMPORT_PLUGIN(QJpegPlugin)
+Q_IMPORT_PLUGIN(QGifPlugin)
+#ifdef Q_OS_WIN
 Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin)
 #elif defined Q_OS_MAC // Q_OS_WIN
-Q_IMPORT_PLUGIN(QWebpPlugin)
 Q_IMPORT_PLUGIN(QCocoaIntegrationPlugin)
 Q_IMPORT_PLUGIN(QGenericEnginePlugin)
 #elif defined Q_OS_LINUX // Q_OS_WIN | Q_OS_MAC
-Q_IMPORT_PLUGIN(QWebpPlugin)
 Q_IMPORT_PLUGIN(QXcbIntegrationPlugin)
 Q_IMPORT_PLUGIN(QConnmanEnginePlugin)
 Q_IMPORT_PLUGIN(QGenericEnginePlugin)
diff --git a/Telegram/codegen b/Telegram/codegen
index 0172289398..3a61c3a32c 160000
--- a/Telegram/codegen
+++ b/Telegram/codegen
@@ -1 +1 @@
-Subproject commit 01722893988a6573e1ba910028fbc0c596c2ae5b
+Subproject commit 3a61c3a32c51e652f639ae506201a31db48359f1
diff --git a/Telegram/gyp/helpers b/Telegram/gyp/helpers
index ac60d8fa23..f70c0fda21 160000
--- a/Telegram/gyp/helpers
+++ b/Telegram/gyp/helpers
@@ -1 +1 @@
-Subproject commit ac60d8fa23ffca6bfc23efa0ee10696a47579ea6
+Subproject commit f70c0fda21bfe9d011bb1ff780f476826bb5f8a2
diff --git a/Telegram/gyp/telegram/linux.gypi b/Telegram/gyp/telegram/linux.gypi
index 6350360316..494d1381e2 100644
--- a/Telegram/gyp/telegram/linux.gypi
+++ b/Telegram/gyp/telegram/linux.gypi
@@ -20,6 +20,7 @@
       ],
     },
     'libraries': [
+      '-Wl,-Bstatic',
       '-lbreakpad_client',
       '-llzma',
       '-lopenal',
@@ -35,6 +36,10 @@
       '-lvdpau',
       '-ldrm',
       '-lz',
+      '-lXi',
+      '-lXext',
+      '-lXfixes',
+      '-lXrender',
 #      '<!(pkg-config 2> /dev/null --libs <@(pkgconfig_libs))',
     ],
     'cflags_cc': [
diff --git a/Telegram/gyp/tests/tests.gyp b/Telegram/gyp/tests/tests.gyp
index 0b43a0635e..43ae1d6969 100644
--- a/Telegram/gyp/tests/tests.gyp
+++ b/Telegram/gyp/tests/tests.gyp
@@ -12,7 +12,7 @@
     'src_loc': '../../SourceFiles',
     'base_loc': '<(submodules_loc)/lib_base',
     'rpl_loc': '<(submodules_loc)/lib_rpl',
-    'mac_target': '10.10',
+    'mac_target': '10.12',
     'list_tests_command': 'python <(DEPTH)/tests/list_tests.py --input <(DEPTH)/tests/tests_list.txt',
   },
   'targets': [{
diff --git a/Telegram/gyp/utils.gyp b/Telegram/gyp/utils.gyp
index 15c5f65ae7..7d5dafaba0 100644
--- a/Telegram/gyp/utils.gyp
+++ b/Telegram/gyp/utils.gyp
@@ -57,40 +57,30 @@
     'target_name': 'Packer',
     'variables': {
       'src_loc': '../SourceFiles',
-      'mac_target': '10.10',
+      'mac_target': '10.12',
     },
     'includes': [
       'helpers/common/executable.gypi',
       'helpers/modules/qt.gypi',
+      'helpers/modules/openssl.gypi',
     ],
     'conditions': [
       [ 'build_win', {
         'libraries': [
-          'libeay32',
-          'ssleay32',
-          'Crypt32',
           'zlibstat',
           'LzmaLib',
         ],
       }],
       [ 'build_linux', {
         'libraries': [
-          'ssl',
-          'crypto',
+          '<(linux_lib_ssl)',
+          '<(linux_lib_crypto)',
           'lzma',
         ],
       }],
       [ 'build_mac', {
-        'include_dirs': [
-          '<(libs_loc)/openssl/include'
-        ],
-        'library_dirs': [
-          '<(libs_loc)/openssl',
-        ],
         'xcode_settings': {
           'OTHER_LDFLAGS': [
-            '-lssl',
-            '-lcrypto',
             '-llzma',
           ],
         },
diff --git a/Telegram/lib_base b/Telegram/lib_base
index cfc1a874eb..dd5ca832f9 160000
--- a/Telegram/lib_base
+++ b/Telegram/lib_base
@@ -1 +1 @@
-Subproject commit cfc1a874eb603c345f60be2ce98a885d9f336d14
+Subproject commit dd5ca832f9b212e553ea5afee9a2dab2c3acd982
diff --git a/Telegram/lib_ui b/Telegram/lib_ui
index f762cc8b87..aa6bf8b0e7 160000
--- a/Telegram/lib_ui
+++ b/Telegram/lib_ui
@@ -1 +1 @@
-Subproject commit f762cc8b87ba16706e402b6d66b1451402357555
+Subproject commit aa6bf8b0e7c18426140a15e79a43f7d24b62c80a
diff --git a/docs/building-cmake.md b/docs/building-cmake.md
index 5f5a0df913..bda4edefcd 100644
--- a/docs/building-cmake.md
+++ b/docs/building-cmake.md
@@ -204,10 +204,10 @@ Go to ***BuildPath*** and run
     sudo make install
     cd ../..
 
-    git clone https://github.com/openssl/openssl
-    cd openssl
-    git checkout OpenSSL_1_0_1-stable
-    ./config
+    git clone https://github.com/openssl/openssl openssl_1_1_1
+    cd openssl_1_1_1
+    git checkout OpenSSL_1_1_1-stable
+    ./config --prefix=/usr/local/desktop-app/openssl-1.1.1
     make $MAKE_THREADS_CNT
     sudo make install
     cd ..
@@ -220,20 +220,21 @@ Go to ***BuildPath*** and run
     sudo make install
     cd ..
 
-    git clone git://code.qt.io/qt/qt5.git qt5_6_2
-    cd qt5_6_2
+    git clone git://code.qt.io/qt/qt5.git qt_5_12_5
+    cd qt_5_12_5
     perl init-repository --module-subset=qtbase,qtimageformats
-    git checkout v5.6.2
-    cd qtimageformats && git checkout v5.6.2 && cd ..
-    cd qtbase && git checkout v5.6.2 && cd ..
-    cd qtbase && git apply ../../patches/qtbase_5_6_2.diff && cd ..
-    cd qtbase/src/plugins/platforminputcontexts
+    git checkout v5.12.5
+    git submodule update qtbase
+    git submodule update qtimageformats
+    cd qtbase
+    git apply ../../patches/qtbase_5_12_5.diff
+    cd src/plugins/platforminputcontexts
     git clone https://github.com/telegramdesktop/fcitx.git
     git clone https://github.com/telegramdesktop/hime.git
     git clone https://github.com/telegramdesktop/nimf.git
     cd ../../../..
 
-    ./configure -prefix "/usr/local/desktop-app/Qt-5.6.2" -release -force-debug-info -opensource -confirm-license -qt-zlib -qt-libpng -qt-libjpeg -qt-freetype -qt-harfbuzz -qt-pcre -qt-xcb -qt-xkbcommon-x11 -no-opengl -no-gtkstyle -static -openssl-linked -nomake examples -nomake tests
+    ./configure -prefix "/usr/local/desktop-app/Qt-5.12.5" -release -force-debug-info -opensource -confirm-license -qt-zlib -qt-libpng -qt-libjpeg -qt-harfbuzz -qt-pcre -qt-xcb -system-freetype -fontconfig -no-opengl -no-gtk -static -openssl-linked -I "/usr/local/desktop-app/openssl-1.1.1/include" OPENSSL_LIBS="/usr/local/desktop-app/openssl-1.1.1/lib/libssl.a /usr/local/desktop-app/openssl-1.1.1/lib/libcrypto.a -ldl -lpthread" -nomake examples -nomake tests
 
     make $MAKE_THREADS_CNT
     sudo make install
diff --git a/docs/building-msvc.md b/docs/building-msvc.md
index 8324432a0c..57bcbdc5d8 100644
--- a/docs/building-msvc.md
+++ b/docs/building-msvc.md
@@ -57,6 +57,8 @@ Open **x86 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
     mkdir Libraries
     cd Libraries
 
+    SET LibrariesPath=%cd%
+
     git clone https://github.com/desktop-app/patches.git
     git clone --branch 0.9.1 https://github.com/ericniebler/range-v3 range-v3
 
@@ -66,15 +68,21 @@ Open **x86 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
     msbuild LzmaLib.sln /property:Configuration=Release
     cd ..\..\..\..
 
-    git clone https://github.com/openssl/openssl.git
-    cd openssl
-    git checkout OpenSSL_1_0_1-stable
-    perl Configure no-shared --prefix="C:\Program Files (x86)\OpenSSL" --openssldir="C:\Program Files (x86)\Common Files\SSL" VC-WIN32
-    ms\do_ms
-    nmake -f ms\nt.mak
-    perl Configure no-shared --prefix="C:\Program Files (x86)\OpenSSL" --openssldir="C:\Program Files (x86)\Common Files\SSL" debug-VC-WIN32
-    ms\do_ms
-    nmake -f ms\nt.mak
+    git clone https://github.com/openssl/openssl.git openssl_1_1_1
+    cd openssl_1_1_1
+    git checkout OpenSSL_1_1_1-stable
+    perl Configure no-share VC-WIN32
+    nmake
+    mkdir out32
+    move libcrypto.lib out32
+    move libssl.lib out32
+    move ossl_static.pdb out32
+    perl Configure no-shared debug-VC-WIN32
+    nmake
+    mkdir out32.dbg
+    move libcrypto.lib out32.dbg
+    move libssl.lib out32.dbg
+    move ossl_static.pdb out32.dbg
     cd ..
 
     git clone https://github.com/telegramdesktop/zlib.git
@@ -133,18 +141,14 @@ Open **x86 Native Tools Command Prompt for VS 2019.bat**, go to ***BuildPath***
     SET PATH=%PATH_BACKUP_%
     cd ..
 
-    git clone git://code.qt.io/qt/qt5.git qt5_6_2
-    cd qt5_6_2
+    git clone git://code.qt.io/qt/qt5.git qt_5_12_5
+    cd qt_5_12_5
     perl init-repository --module-subset=qtbase,qtimageformats
-    git checkout v5.6.2
-    cd qtimageformats
-    git checkout v5.6.2
-    cd ..\qtbase
-    git checkout v5.6.2
-    git apply ../../patches/qtbase_5_6_2.diff
-    cd ..
+    git checkout v5.12.5
+    git submodule update qtbase
+    git submodule update qtimageformats
 
-    configure -debug-and-release -force-debug-info -opensource -confirm-license -static -I "%cd%\..\openssl\inc32" -no-opengl -openssl-linked OPENSSL_LIBS_DEBUG="%cd%\..\openssl\out32.dbg\ssleay32.lib %cd%\..\openssl\out32.dbg\libeay32.lib" OPENSSL_LIBS_RELEASE="%cd%\..\openssl\out32\ssleay32.lib %cd%\..\openssl\out32\libeay32.lib" -mp -nomake examples -nomake tests -platform win32-msvc2015
+    configure -prefix "%LibrariesPath%\Qt-5.12.5" -debug-and-release -force-debug-info -opensource -confirm-license -static -static-runtime -I "%cd%\..\openssl_1_1_1\include" -no-opengl -openssl-linked OPENSSL_LIBS_DEBUG="%cd%\..\openssl_1_1_1\out32.dbg\libssl.lib %cd%\..\openssl_1_1_1\out32.dbg\libcrypto.lib Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib" OPENSSL_LIBS_RELEASE="%cd%\..\openssl_1_1_1\out32\libssl.lib %cd%\..\openssl_1_1_1\out32\libcrypto.lib Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib" -mp -nomake examples -nomake tests -platform win32-msvc
 
     jom -j4
     jom -j4 install
diff --git a/docs/building-xcode.md b/docs/building-xcode.md
index 2fa5a2ac62..736ecdc239 100644
--- a/docs/building-xcode.md
+++ b/docs/building-xcode.md
@@ -10,16 +10,16 @@ You will require **api_id** and **api_hash** to access the Telegram API servers.
 
 ### Download libraries
 
-Download [**xz-5.0.5**](http://tukaani.org/xz/xz-5.0.5.tar.gz) and unpack to ***BuildPath*/Libraries/xz-5.0.5**
+Download [**xz-5.0.5**](http://tukaani.org/xz/xz-5.0.5.tar.gz) and unpack to ***BuildPath*/Libraries/macos/xz-5.0.5**
 
-Download [**libiconv-1.15**](http://www.gnu.org/software/libiconv/#downloading) and unpack to ***BuildPath*/Libraries/libiconv-1.15**
+Download [**libiconv-1.15**](http://www.gnu.org/software/libiconv/#downloading) and unpack to ***BuildPath*/Libraries/macos/libiconv-1.15**
 
 ### Clone source code and prepare libraries
 
 Go to ***BuildPath*** and run
 
-    MAKE_THREADS_CNT=-j4
-    MACOSX_DEPLOYMENT_TARGET=10.8
+    MAKE_THREADS_CNT=-j8
+    MACOSX_DEPLOYMENT_TARGET=10.12
 
     ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
     brew install automake cmake fdk-aac git lame libass libtool libvorbis libvpx ninja opus sdl shtool texi2html theora wget x264 xvid yasm pkg-config
@@ -28,28 +28,43 @@ Go to ***BuildPath*** and run
 
     git clone --recursive https://github.com/telegramdesktop/tdesktop.git
 
-    cd Libraries
+    mkdir ThirdParty
+    cd ThirdParty
+
+    git clone https://github.com/desktop-app/patches.git
+    git clone https://chromium.googlesource.com/external/gyp
+    git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
+    export PATH="$PWD/depot_tools:$PATH"
+    cd gyp
+    git checkout 9f2a7bb1
+    git apply ../patches/gyp.diff
+    ./setup.py build
+    sudo ./setup.py install
+    cd ../..
+
+    cd Libraries/macos
+    LibrariesPath=`pwd`
 
     git clone https://github.com/desktop-app/patches.git
     git clone --branch 0.9.1 https://github.com/ericniebler/range-v3
 
     cd xz-5.0.5
-    CFLAGS="-mmacosx-version-min=10.8" LDFLAGS="-mmacosx-version-min=10.8" ./configure
-    make
+    CFLAGS="-mmacosx-version-min=10.12" LDFLAGS="-mmacosx-version-min=10.12" ./configure --prefix=/usr/local/macos
+    make $MAKE_THREADS_CNT
     sudo make install
     cd ..
 
     git clone https://github.com/telegramdesktop/zlib.git
     cd zlib
-    CFLAGS="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" LDFLAGS="-mmacosx-version-min=10.8" ./configure
+    CFLAGS="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" LDFLAGS="-mmacosx-version-min=10.12" ./configure --prefix=/usr/local/macos
     make $MAKE_THREADS_CNT
     sudo make install
     cd ..
 
-    git clone https://github.com/openssl/openssl
-    cd openssl
-    git checkout OpenSSL_1_0_1-stable
-    ./Configure darwin64-x86_64-cc -static -mmacosx-version-min=10.8
+    git clone https://github.com/openssl/openssl openssl_1_1_1
+    cd openssl_1_1_1
+    git checkout OpenSSL_1_1_1-stable
+    ./Configure --prefix=/usr/local/macos darwin64-x86_64-cc -static -mmacosx-version-min=10.12
     make build_libs $MAKE_THREADS_CNT
     cd ..
 
@@ -57,13 +72,13 @@ Go to ***BuildPath*** and run
     cd opus
     git checkout v1.3
     ./autogen.sh
-    CFLAGS="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" CPPFLAGS="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" LDFLAGS="-mmacosx-version-min=10.8" ./configure
+    CFLAGS="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" CPPFLAGS="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" LDFLAGS="-mmacosx-version-min=10.12" ./configure --prefix=/usr/local/macos
     make $MAKE_THREADS_CNT
     sudo make install
     cd ..
 
     cd libiconv-1.15
-    CFLAGS="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" CPPFLAGS="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" LDFLAGS="-mmacosx-version-min=10.8" ./configure --enable-static
+    CFLAGS="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" CPPFLAGS="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" LDFLAGS="-mmacosx-version-min=10.12" ./configure --enable-static --prefix=/usr/local/macos
     make $MAKE_THREADS_CNT
     sudo make install
     cd ..
@@ -75,10 +90,10 @@ Go to ***BuildPath*** and run
     LDFLAGS=`freetype-config --libs`
     PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig:/usr/lib/pkgconfig:/usr/X11/lib/pkgconfig
 
-    ./configure --prefix=/usr/local \
-    --extra-cflags="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" \
-    --extra-cxxflags="-mmacosx-version-min=10.8 -Werror=unguarded-availability-new" \
-    --extra-ldflags="-mmacosx-version-min=10.8" \
+    ./configure --prefix=/usr/local/macos \
+    --extra-cflags="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" \
+    --extra-cxxflags="-mmacosx-version-min=10.12 -Werror=unguarded-availability-new" \
+    --extra-ldflags="-mmacosx-version-min=10.12" \
     --enable-protocol=file --enable-libopus \
     --disable-programs \
     --disable-doc \
@@ -184,49 +199,42 @@ Go to ***BuildPath*** and run
     cd openal-soft
     git checkout v1.19
     cd build
-    CFLAGS='-Werror=unguarded-availability-new' CPPFLAGS='-Werror=unguarded-availability-new' LDFLAGS='-stdlib=libc++' cmake -D ALSOFT_EXAMPLES=OFF -D LIBTYPE:STRING=STATIC -D CMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.8 ..
+    CFLAGS='-Werror=unguarded-availability-new' CPPFLAGS='-Werror=unguarded-availability-new' cmake -D CMAKE_INSTALL_PREFIX:PATH=/usr/local/macos -D ALSOFT_EXAMPLES=OFF -D LIBTYPE:STRING=STATIC -D CMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.12 ..
     make $MAKE_THREADS_CNT
     sudo make install
     cd ../..
 
-    git clone https://chromium.googlesource.com/external/gyp
-    git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
-    export PATH="$PWD/depot_tools:$PATH"
-    cd gyp
-    git checkout 9f2a7bb1
-    git apply ../patches/gyp.diff
-    ./setup.py build
-    sudo ./setup.py install
-    cd ..
-
     git clone https://chromium.googlesource.com/crashpad/crashpad.git
     cd crashpad
     git checkout feb3aa3923
-    git apply ../../tdesktop/Telegram/Patches/crashpad.diff
+    git apply ../../../tdesktop/Telegram/Patches/crashpad.diff
     cd third_party/mini_chromium
     git clone https://chromium.googlesource.com/chromium/mini_chromium
     cd mini_chromium
     git checkout 7c5b0c1ab4
-    git apply ../../../../../tdesktop/Telegram/Patches/mini_chromium.diff
+    git apply ../../../../../../tdesktop/Telegram/Patches/mini_chromium.diff
     cd ../../gtest
     git clone https://chromium.googlesource.com/external/github.com/google/googletest gtest
     cd gtest
     git checkout d62d6c6556
     cd ../../..
 
-    build/gyp_crashpad.py -Dmac_deployment_target=10.8
+    build/gyp_crashpad.py -Dmac_deployment_target=10.10
     ninja -C out/Debug
     ninja -C out/Release
     cd ..
 
-    git clone git://code.qt.io/qt/qt5.git qt5_6_2
-    cd qt5_6_2
+    git clone git://code.qt.io/qt/qt5.git qt5_12_5
+    cd qt5_12_5
     perl init-repository --module-subset=qtbase,qtimageformats
-    git checkout v5.6.2
-    cd qtimageformats && git checkout v5.6.2 && cd ..
-    cd qtbase && git checkout v5.6.2 && git apply ../../patches/qtbase_5_6_2.diff && cd ..
+    git checkout v5.12.5
+    git submodule update qtbase
+    git submodule update qtimageformats
+    cd qtbase
+    git apply ../../patches/qtbase_5_12_5.diff
+    cd ..
 
-    ./configure -prefix "/usr/local/desktop-app/Qt-5.6.2" -debug-and-release -force-debug-info -opensource -confirm-license -static -opengl desktop -no-openssl -securetransport -nomake examples -nomake tests -platform macx-clang
+    ./configure -prefix "/usr/local/desktop-app/Qt-5.12.5" -debug-and-release -force-debug-info -opensource -confirm-license -static -opengl desktop -no-openssl -securetransport -nomake examples -nomake tests -platform macx-clang
     make $MAKE_THREADS_CNT
     sudo make install
     cd ..