Rename Mac OS X to macOS in code and documents

src/EditDialog.cpp

@@ -386,7 +386,7 @@ void EditDialog::importData(bool asLink)
                 OpenDataFile,
                 this,
                 tr("Choose a file to import")
-#ifndef Q_OS_MAC // Filters on OS X are buggy
+#ifndef Q_OS_MAC // Filters on macOS are buggy
                 , filters.join(";;")
                 , &selectedFilter
 #endif

src/Settings.cpp

@@ -268,7 +268,7 @@ QVariant Settings::getDefaultValue(const std::string& group, const std::string&
     // editor/fontsize or log/fontsize?
     if((group == "editor" || group == "log") && name == "fontsize")
 #ifdef Q_OS_MAC
-       // Use 12 pt size as the default on OSX
+       // Use 12 pt size as the default on macOS
         return 12;
 #else
         return 9;

src/extensions/extension-functions.c

@@ -20,7 +20,7 @@ Compilation instructions:
  Compile this C source file into a dynamic library as follows:
  * Linux:
    gcc -fPIC -lm -shared extension-functions.c -o libsqlitefunctions.so
- * Mac OS X:
+ * macOS:
    gcc -fno-common -dynamiclib extension-functions.c -o libsqlitefunctions.dylib
  (You may need to add flags
   -I /opt/local/include/ -L/opt/local/lib -lsqlite3