Merge #13617: release: require macOS 10.10+

3828a79711 scripted-diff: prefer MAC_OSX over __APPLE__ (fanquake)
fa6e841e89 gui: remove macOS ProgressBar workaround (fanquake)
68c272527f gui: remove SubstituteFonts (fanquake)
6c6dbd8af5 doc: mention that macOS 10.10 is now required (fanquake)
84b0cfa8b6 release: bump minimum required macOS to 10.10 (fanquake)
26b15df99d depends: set OSX_MIN_VERSION to 10.10 (fanquake)

Pull request description:

  Closes #13362

  d99abfddb0c8f2111340a6127e77cc686e0043d8
  This workaround should no longer be required, as it should have only been in use when compiled with the 10.7 SDK, which we haven't been building with for a while now.

  5bc5ae30982a0f0f6a9804b05d99434af770c724
  The bugreport linked with this code is for an unrelated? issue, however from what I can tell the correct QTBUG is this one https://bugreports.qt.io/browse/QTBUG-20880. Reading though the discussion there, it seems that the way progress bars are animated changed in macOS 10.10.
  Qt was patched [here (5.5+)](https://codereview.qt-project.org/#/c/112379/):
  > Disable progress bar animations on 10.10 Yosemite and higher - the native style does not animate them any more. Keep the indeterminate progress bar animation.

  Given all of that, I don't think this is worth keeping around, as it would seem to only be useful in the case that a macOS user is compiling with a Qt < 5.5. That should be pretty unlikely, as we don't support downloaded Qt binaries, and brew currently provides [5.11.1](https://github.com/Homebrew/homebrew-core/blob/571b46213c70ca1573da6d0425b0bd6df34961ee/Formula/qt.rb).

Tree-SHA512: 4278cb30cc9bcb313e166129ecf032c808995f8b51a3123637c47860a0010ac88f86f82ec44792153b6b1e5cca595f25013b2eaeae80194647b9ce4f7eaf32c1

13 files changed, 14 insertions, 73 deletions

diff --git a/.travis.yml b/.travis.yml
index 2e03511a6d..19e7174475 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -40,7 +40,7 @@ env:
 # x86_64 Linux, No wallet
     - HOST=x86_64-unknown-linux-gnu PACKAGES="python3" DEP_OPTS="NO_WALLET=1" RUN_TESTS=true GOAL="install" BITCOIN_CONFIG="--enable-glibc-back-compat --enable-reduce-exports"
 # Cross-Mac
-    - HOST=x86_64-apple-darwin11 PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python-dev python3-setuptools-git" BITCOIN_CONFIG="--enable-gui --enable-reduce-exports --enable-werror" OSX_SDK=10.11 GOAL="all deploy"
+    - HOST=x86_64-apple-darwin14 PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python-dev python3-setuptools-git" BITCOIN_CONFIG="--enable-gui --enable-reduce-exports --enable-werror" OSX_SDK=10.11 GOAL="all deploy"
 
 before_install:
     - export PATH=$(echo $PATH | tr ':' "\n" | sed '/\/opt\/python/d' | tr "\n" ":" | sed "s|::|:|g")
diff --git a/contrib/gitian-descriptors/gitian-osx.yml b/contrib/gitian-descriptors/gitian-osx.yml
index 7d4793b97d..e2695b6f7b 100644
--- a/contrib/gitian-descriptors/gitian-osx.yml
+++ b/contrib/gitian-descriptors/gitian-osx.yml
@@ -34,7 +34,7 @@ files:
 - "MacOSX10.11.sdk.tar.gz"
 script: |
   WRAP_DIR=$HOME/wrapped
-  HOSTS="x86_64-apple-darwin11"
+  HOSTS="x86_64-apple-darwin14"
   CONFIGFLAGS="--enable-reduce-exports --disable-bench --disable-gui-tests GENISOIMAGE=$WRAP_DIR/genisoimage"
   FAKETIME_HOST_PROGS=""
   FAKETIME_PROGS="ar ranlib date dmg genisoimage"
diff --git a/depends/Makefile b/depends/Makefile
index c73ea0f730..3686aaf1f8 100644
--- a/depends/Makefile
+++ b/depends/Makefile
@@ -178,7 +178,7 @@ install: check-packages $(host_prefix)/share/config.site
 download-one: check-sources $(all_sources)
 
 download-osx:
-	@$(MAKE) -s HOST=x86_64-apple-darwin11 download-one
+	@$(MAKE) -s HOST=x86_64-apple-darwin14 download-one
 download-linux:
 	@$(MAKE) -s HOST=x86_64-unknown-linux-gnu download-one
 download-win:
diff --git a/depends/README.md b/depends/README.md
index 226a1cc935..fd343f7010 100644
--- a/depends/README.md
+++ b/depends/README.md
@@ -22,7 +22,7 @@ Common `host-platform-triplets` for cross compilation are:
 
 - `i686-w64-mingw32` for Win32
 - `x86_64-w64-mingw32` for Win64
-- `x86_64-apple-darwin11` for macOS
+- `x86_64-apple-darwin14` for macOS
 - `arm-linux-gnueabihf` for Linux ARM 32 bit
 - `aarch64-linux-gnu` for Linux ARM 64 bit
 - `riscv32-linux-gnu` for Linux RISC-V 32 bit
diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk
index 4e58bec74e..a1c943d60b 100644
--- a/depends/hosts/darwin.mk
+++ b/depends/hosts/darwin.mk
@@ -1,4 +1,4 @@
-OSX_MIN_VERSION=10.8
+OSX_MIN_VERSION=10.10
 OSX_SDK_VERSION=10.11
 OSX_SDK=$(SDK_PATH)/MacOSX$(OSX_SDK_VERSION).sdk
 LD64_VERSION=253.9
diff --git a/doc/build-osx.md b/doc/build-osx.md
index a07dbd1e1d..486a505b60 100644
--- a/doc/build-osx.md
+++ b/doc/build-osx.md
@@ -91,6 +91,6 @@ Other commands:
 Notes
 -----
 
-* Tested on OS X 10.8 Mountain Lion through macOS 10.13 High Sierra on 64-bit Intel processors only.
+* Tested on OS X 10.10 Yosemite through macOS 10.13 High Sierra on 64-bit Intel processors only.
 
 * Building with downloaded Qt binaries is not officially supported. See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714)
diff --git a/doc/release-notes.md b/doc/release-notes.md
index b7eaa6eaf4..ad0c42ab31 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -48,11 +48,14 @@ Compatibility
 ==============
 
 Bitcoin Core is extensively tested on multiple operating systems using
-the Linux kernel, macOS 10.8+, and Windows 7 and newer (Windows XP is not supported).
+the Linux kernel, macOS 10.10+, and Windows 7 and newer (Windows XP is not supported).
 
 Bitcoin Core should also work on most other Unix-like systems but is not
 frequently tested on them.
 
+From 0.17.0 onwards macOS <10.10 is no longer supported. 0.17.0 is built using Qt 5.9.x, which doesn't
+support versions of macOS older than 10.10.
+
 Notable changes
 ===============
 
diff --git a/share/qt/Info.plist.in b/share/qt/Info.plist.in
index 5ca6d9d015..17b4ee47de 100644
--- a/share/qt/Info.plist.in
+++ b/share/qt/Info.plist.in
@@ -3,7 +3,7 @@
 <plist version="0.9">
 <dict>
   <key>LSMinimumSystemVersion</key>
-  <string>10.8.0</string>
+  <string>10.10.0</string>
 
   <key>LSArchitecturePriority</key>
   <array>
diff --git a/src/compat/byteswap.h b/src/compat/byteswap.h
index c331af2b5e..bfb80bd632 100644
--- a/src/compat/byteswap.h
+++ b/src/compat/byteswap.h
@@ -15,7 +15,7 @@
 #include <byteswap.h>
 #endif
 
-#if defined(__APPLE__)
+#if defined(MAC_OSX)
 
 #if !defined(bswap_16)
 
@@ -61,6 +61,6 @@ inline uint64_t bswap_64(uint64_t x)
 }
 #endif // HAVE_DECL_BSWAP64 == 0
 
-#endif // defined(__APPLE__)
+#endif // defined(MAC_OSX)
 
 #endif // BITCOIN_COMPAT_BYTESWAP_H
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 3454d3421e..5d0e384cf8 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -614,7 +614,6 @@ int main(int argc, char *argv[])
     QApplication::setOrganizationName(QAPP_ORG_NAME);
     QApplication::setOrganizationDomain(QAPP_ORG_DOMAIN);
     QApplication::setApplicationName(QAPP_APP_NAME_DEFAULT);
-    GUIUtil::SubstituteFonts(GetLangTerritory());
 
     /// 4. Initialization of translations, so that intro dialog is in user's language
     // Now that QSettings are accessible, initialize translations
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index acd9f7b35c..3ec8c340be 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -63,16 +63,6 @@
 
 static fs::detail::utf8_codecvt_facet utf8;
 
-#if defined(Q_OS_MAC)
-extern double NSAppKitVersionNumber;
-#if !defined(NSAppKitVersionNumber10_8)
-#define NSAppKitVersionNumber10_8 1187
-#endif
-#if !defined(NSAppKitVersionNumber10_9)
-#define NSAppKitVersionNumber10_9 1265
-#endif
-#endif
-
 namespace GUIUtil {
 
 QString dateTimeStr(const QDateTime &date)
@@ -391,42 +381,6 @@ bool openBitcoinConf()
     return QDesktopServices::openUrl(QUrl::fromLocalFile(boostPathToQString(pathConfig)));
 }
 
-void SubstituteFonts(const QString& language)
-{
-#if defined(Q_OS_MAC)
-// Background:
-// OSX's default font changed in 10.9 and Qt is unable to find it with its
-// usual fallback methods when building against the 10.7 sdk or lower.
-// The 10.8 SDK added a function to let it find the correct fallback font.
-// If this fallback is not properly loaded, some characters may fail to
-// render correctly.
-//
-// The same thing happened with 10.10. .Helvetica Neue DeskInterface is now default.
-//
-// Solution: If building with the 10.7 SDK or lower and the user's platform
-// is 10.9 or higher at runtime, substitute the correct font. This needs to
-// happen before the QApplication is created.
-#if defined(MAC_OS_X_VERSION_MAX_ALLOWED) && MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_8
-    if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_8)
-    {
-        if (floor(NSAppKitVersionNumber) <= NSAppKitVersionNumber10_9)
-            /* On a 10.9 - 10.9.x system */
-            QFont::insertSubstitution(".Lucida Grande UI", "Lucida Grande");
-        else
-        {
-            /* 10.10 or later system */
-            if (language == "zh_CN" || language == "zh_TW" || language == "zh_HK") // traditional or simplified Chinese
-              QFont::insertSubstitution(".Helvetica Neue DeskInterface", "Heiti SC");
-            else if (language == "ja") // Japanese
-              QFont::insertSubstitution(".Helvetica Neue DeskInterface", "Songti SC");
-            else
-              QFont::insertSubstitution(".Helvetica Neue DeskInterface", "Lucida Grande");
-        }
-    }
-#endif
-#endif
-}
-
 ToolTipToRichTextFilter::ToolTipToRichTextFilter(int _size_threshold, QObject *parent) :
     QObject(parent),
     size_threshold(_size_threshold)
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index e965a91d18..199aa9474f 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -120,9 +120,6 @@ namespace GUIUtil
     // Open the config file
     bool openBitcoinConf();
 
-    // Replace invalid default fonts with known good ones
-    void SubstituteFonts(const QString& language);
-
     /** Qt event filter that intercepts ToolTipChange events, and replaces the tooltip with a rich text
       representation if needed. This assures that Qt can word-wrap long tooltip messages.
       Tooltips longer than the provided size threshold (in characters) are wrapped.
@@ -233,19 +230,7 @@ namespace GUIUtil
         void mouseReleaseEvent(QMouseEvent *event);
     };
 
-#if defined(Q_OS_MAC)
-    // workaround for Qt OSX Bug:
-    // https://bugreports.qt-project.org/browse/QTBUG-15631
-    // QProgressBar uses around 10% CPU even when app is in background
-    class ProgressBar : public ClickableProgressBar
-    {
-        bool event(QEvent *e) {
-            return (e->type() != QEvent::StyleAnimationUpdate) ? QProgressBar::event(e) : false;
-        }
-    };
-#else
     typedef ClickableProgressBar ProgressBar;
-#endif
 
 } // namespace GUIUtil
 
diff --git a/src/util.cpp b/src/util.cpp
index 8df23dd08f..2f81f50a71 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1021,7 +1021,7 @@ bool FileCommit(FILE *file)
         LogPrintf("%s: fdatasync failed: %d\n", __func__, errno);
         return false;
     }
-    #elif defined(__APPLE__) && defined(F_FULLFSYNC)
+    #elif defined(MAC_OSX) && defined(F_FULLFSYNC)
     if (fcntl(fileno(file), F_FULLFSYNC, 0) == -1) { // Manpage says "value other than -1" is returned on success
         LogPrintf("%s: fcntl F_FULLFSYNC failed: %d\n", __func__, errno);
         return false;