diff --git a/src/plugins/clangtools/clangselectablefilesdialog.cpp b/src/plugins/clangtools/clangselectablefilesdialog.cpp
index 20e1e68098c..7a7dbd9013e 100644
--- a/src/plugins/clangtools/clangselectablefilesdialog.cpp
+++ b/src/plugins/clangtools/clangselectablefilesdialog.cpp
@@ -248,7 +248,7 @@ private:
                 // Create needed extra dir nodes
                 FileName currentDirPath = parentDir;
                 for (const QString &dirName : dirsToCreate) {
-                    currentDirPath.appendPath(dirName);
+                    currentDirPath = currentDirPath.pathAppended(dirName);
 
                     Tree *newDirNode = createDirNode(dirName, currentDirPath);
                     linkDirNode(parentNode, newDirNode);
diff --git a/src/plugins/cmakeprojectmanager/cmakeproject.cpp b/src/plugins/cmakeprojectmanager/cmakeproject.cpp
index 3e92f60b678..87757311142 100644
--- a/src/plugins/cmakeprojectmanager/cmakeproject.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeproject.cpp
@@ -276,7 +276,8 @@ void CMakeProject::updateProjectData(CMakeBuildConfiguration *bc)
     {
         CMakeConfigItem settingFileItem;
         settingFileItem.key = "ANDROID_DEPLOYMENT_SETTINGS_FILE";
-        settingFileItem.value = bc->buildDirectory().appendPath("android_deployment_settings.json").toString().toUtf8();
+        settingFileItem.value = bc->buildDirectory()
+                .pathAppended("android_deployment_settings.json").toString().toUtf8();
         patchedConfig.append(settingFileItem);
     }
 
diff --git a/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp b/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp
index 77ae1887bdc..f42d3085184 100644
--- a/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp
@@ -207,9 +207,7 @@ static Utils::FileName qmakeFromCMakeCache(const CMakeConfig &config)
 
                     // Eat the leading "}/" and trailing "
                     const QByteArray locationPart =  origLine.mid(sp + 2, ep - 2 - sp);
-                    Utils::FileName result = baseQtDir;
-                    result.appendPath(QString::fromUtf8(locationPart));
-                    return result;
+                    return baseQtDir.pathAppended(QString::fromUtf8(locationPart));
                 }
             }
         }
diff --git a/src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp b/src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp
index 178acc62c04..616eb58bbd8 100644
--- a/src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp
@@ -144,8 +144,7 @@ bool CMakeListsNode::supportsAction(ProjectExplorer::ProjectAction action, const
 
 Utils::optional<Utils::FileName> CMakeListsNode::visibleAfterAddFileAction() const
 {
-    Utils::FileName projFile{filePath()};
-    return projFile.appendPath("CMakeLists.txt");
+    return filePath().pathAppended("CMakeLists.txt");
 }
 
 CMakeProjectNode::CMakeProjectNode(const Utils::FileName &directory) :
@@ -251,8 +250,7 @@ bool CMakeTargetNode::addFiles(const QStringList &filePaths, QStringList *)
 
 Utils::optional<Utils::FileName> CMakeTargetNode::visibleAfterAddFileAction() const
 {
-    Utils::FileName projFile{filePath()};
-    return projFile.appendPath("CMakeLists.txt");
+    return filePath().pathAppended("CMakeLists.txt");
 }
 
 void CMakeTargetNode::setTargetInformation(const QList<Utils::FileName> &artifacts,
diff --git a/src/plugins/cmakeprojectmanager/cmaketool.cpp b/src/plugins/cmakeprojectmanager/cmaketool.cpp
index 795f2dc7cba..0f348f13e3a 100644
--- a/src/plugins/cmakeprojectmanager/cmaketool.cpp
+++ b/src/plugins/cmakeprojectmanager/cmaketool.cpp
@@ -190,8 +190,7 @@ QVariantMap CMakeTool::toMap() const
 Utils::FileName CMakeTool::cmakeExecutable() const
 {
     if (Utils::HostOsInfo::isMacHost() && m_executable.endsWith(".app")) {
-        Utils::FileName toTest = m_executable;
-        toTest = toTest.appendPath("Contents/bin/cmake");
+        const Utils::FileName toTest = m_executable.pathAppended("Contents/bin/cmake");
         if (toTest.exists())
             return toTest;
     }
diff --git a/src/plugins/cmakeprojectmanager/servermodereader.cpp b/src/plugins/cmakeprojectmanager/servermodereader.cpp
index 64d0594c9db..e63243f887a 100644
--- a/src/plugins/cmakeprojectmanager/servermodereader.cpp
+++ b/src/plugins/cmakeprojectmanager/servermodereader.cpp
@@ -813,8 +813,7 @@ static void createProjectNode(const QHash<Utils::FileName, ProjectNode *> &cmake
     ProjectNode *cmln = cmakeListsNodes.value(dir);
     QTC_ASSERT(cmln, qDebug() << dir.toUserOutput(); return);
 
-    Utils::FileName projectName = dir;
-    projectName.appendPath(".project::" + displayName);
+    const Utils::FileName projectName = dir.pathAppended(".project::" + displayName);
 
     ProjectNode *pn = cmln->projectNode(projectName);
     if (!pn) {
@@ -865,8 +864,7 @@ void ServerModeReader::addTargets(const QHash<Utils::FileName, ProjectExplorer::
         tNode->setTargetInformation(t->artifacts, t->type);
         QList<FolderNode::LocationInfo> info;
         // Set up a default target path:
-        FileName targetPath = t->sourceDirectory;
-        targetPath.appendPath("CMakeLists.txt");
+        FileName targetPath = t->sourceDirectory.pathAppended("CMakeLists.txt");
         for (CrossReference *cr : qAsConst(t->crossReferences)) {
             BacktraceItem *bt = cr->backtrace.isEmpty() ? nullptr : cr->backtrace.at(0);
             if (bt) {
diff --git a/src/plugins/cmakeprojectmanager/tealeafreader.cpp b/src/plugins/cmakeprojectmanager/tealeafreader.cpp
index 8b83e2797b7..3e3a51d3e2d 100644
--- a/src/plugins/cmakeprojectmanager/tealeafreader.cpp
+++ b/src/plugins/cmakeprojectmanager/tealeafreader.cpp
@@ -235,8 +235,7 @@ QList<CMakeBuildTarget> TeaLeafReader::takeBuildTargets()
 
 CMakeConfig TeaLeafReader::takeParsedConfiguration()
 {
-    FileName cacheFile = m_parameters.workDirectory;
-    cacheFile.appendPath(QLatin1String("CMakeCache.txt"));
+    const FileName cacheFile = m_parameters.workDirectory.pathAppended("CMakeCache.txt");
 
     if (!cacheFile.exists())
         return { };
@@ -432,8 +431,7 @@ void TeaLeafReader::extractData()
     m_cmakeFiles.insert(cbpFile);
 
     // Add CMakeCache.txt file:
-    FileName cacheFile = m_parameters.workDirectory;
-    cacheFile.appendPath(QLatin1String("CMakeCache.txt"));
+    const FileName cacheFile = m_parameters.workDirectory.pathAppended("CMakeCache.txt");
     if (cacheFile.toFileInfo().exists())
         m_cmakeFiles.insert(cacheFile);
 
diff --git a/src/plugins/compilationdatabaseprojectmanager/compilationdatabaseproject.cpp b/src/plugins/compilationdatabaseprojectmanager/compilationdatabaseproject.cpp
index b179017cfd8..d10ec35d791 100644
--- a/src/plugins/compilationdatabaseprojectmanager/compilationdatabaseproject.cpp
+++ b/src/plugins/compilationdatabaseprojectmanager/compilationdatabaseproject.cpp
@@ -475,14 +475,11 @@ void CompilationDatabaseProject::buildTreeAndProjectParts(const Utils::FileName
     }
 
     if (!extras.empty()) {
-        const QString baseDir = projectFile.parentDir().toString();
+        const Utils::FileName baseDir = projectFile.parentDir();
 
         QStringList extraFiles;
-        for (const QString &extra : extras) {
-            auto extraFile = Utils::FileName::fromString(baseDir);
-            extraFile.appendPath(extra);
-            extraFiles.append(extraFile.toString());
-        }
+        for (const QString &extra : extras)
+            extraFiles.append(baseDir.pathAppended(extra).toString());
 
         CppTools::RawProjectPart rppExtra;
         rppExtra.setFiles(extraFiles);
diff --git a/src/plugins/cpptools/headerpathfilter.cpp b/src/plugins/cpptools/headerpathfilter.cpp
index 98c4579cbae..83ad478b0c6 100644
--- a/src/plugins/cpptools/headerpathfilter.cpp
+++ b/src/plugins/cpptools/headerpathfilter.cpp
@@ -148,9 +148,8 @@ void HeaderPathFilter::tweakHeaderPaths()
 void HeaderPathFilter::addPreIncludesPath()
 {
     if (projectDirectory.size()) {
-        Utils::FileName rootProjectDirectory = Utils::FileName::fromString(projectDirectory);
-
-        rootProjectDirectory.appendPath(".pre_includes");
+        const Utils::FileName rootProjectDirectory = Utils::FileName::fromString(projectDirectory)
+                .pathAppended(".pre_includes");
 
         systemHeaderPaths.push_back(
             {rootProjectDirectory.toString(), ProjectExplorer::HeaderPathType::System});
diff --git a/src/plugins/git/gerrit/gerritparameters.cpp b/src/plugins/git/gerrit/gerritparameters.cpp
index a505bda6e49..b2897d4094e 100644
--- a/src/plugins/git/gerrit/gerritparameters.cpp
+++ b/src/plugins/git/gerrit/gerritparameters.cpp
@@ -60,8 +60,7 @@ static inline QString detectApp(const char *defaultExe)
     const FileName gitBinDir = GerritPlugin::gitBinDirectory();
     if (gitBinDir.isEmpty())
         return QString();
-    FileName path = gitBinDir;
-    path.appendPath(defaultApp);
+    FileName path = gitBinDir.pathAppended(defaultApp);
     if (path.exists())
         return path.toString();
 
@@ -74,7 +73,7 @@ static inline QString detectApp(const char *defaultExe)
     const QStringList entries = dir.entryList({"mingw*"});
     if (entries.isEmpty())
         return QString();
-    path.appendPath(entries.first()).appendPath("bin").appendPath(defaultApp);
+    path = path.pathAppended(entries.first()).pathAppended("bin").pathAppended(defaultApp);
     if (path.exists())
         return path.toString();
     return QString();
diff --git a/src/plugins/projectexplorer/projectnodes.cpp b/src/plugins/projectexplorer/projectnodes.cpp
index 0ebcca588bf..769d83fe517 100644
--- a/src/plugins/projectexplorer/projectnodes.cpp
+++ b/src/plugins/projectexplorer/projectnodes.cpp
@@ -89,7 +89,7 @@ static FolderNode *recursiveFindOrCreateFolderNode(FolderNode *folder,
 
     ProjectExplorer::FolderNode *parent = folder;
     foreach (const QString &part, parts) {
-        path.appendPath(part);
+        path = path.pathAppended(part);
         // Find folder in subFolders
         FolderNode *next = folderNode(parent, path);
         if (!next) {
diff --git a/src/plugins/qbsprojectmanager/qbsbuildstep.cpp b/src/plugins/qbsprojectmanager/qbsbuildstep.cpp
index 7da92d837d4..a039be62cb1 100644
--- a/src/plugins/qbsprojectmanager/qbsbuildstep.cpp
+++ b/src/plugins/qbsprojectmanager/qbsbuildstep.cpp
@@ -266,8 +266,8 @@ Utils::FileName QbsBuildStep::installRoot(VariableHandling variableHandling) con
 
     const QbsBuildConfiguration * const bc
             = static_cast<QbsBuildConfiguration *>(buildConfiguration());
-    return bc->buildDirectory().appendPath(bc->configurationName())
-            .appendPath(qbs::InstallOptions::defaultInstallRoot());
+    return bc->buildDirectory().pathAppended(bc->configurationName())
+            .pathAppended(qbs::InstallOptions::defaultInstallRoot());
 }
 
 int QbsBuildStep::maxJobs() const
diff --git a/src/plugins/qbsprojectmanager/qbsprojectimporter.cpp b/src/plugins/qbsprojectmanager/qbsprojectimporter.cpp
index 063e14d363e..6d40a0acc19 100644
--- a/src/plugins/qbsprojectmanager/qbsprojectimporter.cpp
+++ b/src/plugins/qbsprojectmanager/qbsprojectimporter.cpp
@@ -203,8 +203,7 @@ Kit *QbsProjectImporter::createKit(void *directoryData) const
     qCDebug(qbsPmLog) << "creating kit for imported build" << bgData->bgFilePath.toUserOutput();
     QtVersionData qtVersionData;
     if (!bgData->qtBinPath.isEmpty()) {
-        FileName qmakeFilePath = bgData->qtBinPath;
-        qmakeFilePath.appendPath(HostOsInfo::withExecutableSuffix("qmake"));
+        const FileName qmakeFilePath = bgData->qtBinPath.pathAppended(HostOsInfo::withExecutableSuffix("qmake"));
         qtVersionData = findOrCreateQtVersion(qmakeFilePath);
     }
     return createTemporaryKit(qtVersionData,[this, bgData](Kit *k) -> void {
diff --git a/src/plugins/qmakeprojectmanager/qmakeparsernodes.cpp b/src/plugins/qmakeprojectmanager/qmakeparsernodes.cpp
index 50a3d35af4c..0a2d4e3a2b7 100644
--- a/src/plugins/qmakeprojectmanager/qmakeparsernodes.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakeparsernodes.cpp
@@ -1942,15 +1942,14 @@ FileNameList QmakeProFile::generatedFiles(const FileName &buildDir,
             location = buildDir;
         if (location.isEmpty())
             return { };
-        location.appendPath(QLatin1String("ui_")
-                            + sourceFile.toFileInfo().completeBaseName()
-                            + singleVariableValue(Variable::HeaderExtension));
+        location = location.pathAppended("ui_"
+                                         + sourceFile.toFileInfo().completeBaseName()
+                                         + singleVariableValue(Variable::HeaderExtension));
         return { Utils::FileName::fromString(QDir::cleanPath(location.toString())) };
     } else if (sourceFileType == FileType::StateChart) {
         if (buildDir.isEmpty())
             return { };
-        FileName location = buildDir;
-        location.appendPath(sourceFile.toFileInfo().completeBaseName());
+        const FileName location = buildDir.pathAppended(sourceFile.toFileInfo().completeBaseName());
         return {
             location.stringAppended(singleVariableValue(Variable::HeaderExtension)),
             location.stringAppended(singleVariableValue(Variable::CppExtension))
diff --git a/src/plugins/qmakeprojectmanager/qmakeproject.cpp b/src/plugins/qmakeprojectmanager/qmakeproject.cpp
index e03a7e18989..eb7a406051c 100644
--- a/src/plugins/qmakeprojectmanager/qmakeproject.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakeproject.cpp
@@ -1123,7 +1123,7 @@ void QmakeProject::collectLibraryData(const QmakeProFile *file, DeploymentData &
     case Abi::DarwinOS: {
         FileName destDir = destDirFor(ti);
         if (config.contains(QLatin1String("lib_bundle"))) {
-            destDir.appendPath(ti.target + ".framework");
+            destDir = destDir.pathAppended(ti.target + ".framework");
         } else {
             if (!(isPlugin && config.contains(QLatin1String("no_plugin_name_prefix"))))
                 targetFileName.prepend(QLatin1String("lib"));
diff --git a/src/plugins/qtsupport/baseqtversion.cpp b/src/plugins/qtsupport/baseqtversion.cpp
index 7316994a801..d78a8091bff 100644
--- a/src/plugins/qtsupport/baseqtversion.cpp
+++ b/src/plugins/qtsupport/baseqtversion.cpp
@@ -469,7 +469,7 @@ FileNameList BaseQtVersion::directoriesToIgnoreInProjectTree() const
 
     FileName mkspecPathSrc = FileName::fromUserInput(qmakeProperty("QT_HOST_DATA", PropertyVariantSrc));
     if (!mkspecPathSrc.isEmpty()) {
-        mkspecPathSrc.appendPath("mkspecs");
+        mkspecPathSrc = mkspecPathSrc.pathAppended("mkspecs");
         if (mkspecPathSrc != mkspecPathGet)
             result.append(mkspecPathSrc);
     }
diff --git a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
index 00748deafac..63b9175c094 100644
--- a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
+++ b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
@@ -159,8 +159,8 @@ QString ExamplesWelcomePage::copyToAlternativeLocation(const QFileInfo& proFileI
                     it->replace(projectDir, targetDir);
 
                 foreach (const QString &dependency, dependencies) {
-                    FileName targetFile = FileName::fromString(targetDir);
-                    targetFile.appendPath(QDir(dependency).dirName());
+                    const FileName targetFile = FileName::fromString(targetDir)
+                            .pathAppended(QDir(dependency).dirName());
                     if (!FileUtils::copyRecursively(FileName::fromString(dependency), targetFile,
                             &error)) {
                         QMessageBox::warning(ICore::mainWindow(), tr("Cannot Copy Project"), error);
diff --git a/src/plugins/qtsupport/qscxmlcgenerator.cpp b/src/plugins/qtsupport/qscxmlcgenerator.cpp
index 4d1fc8e50a3..b5d65a5ccd9 100644
--- a/src/plugins/qtsupport/qscxmlcgenerator.cpp
+++ b/src/plugins/qtsupport/qscxmlcgenerator.cpp
@@ -118,8 +118,7 @@ FileNameToContentsHash QScxmlcGenerator::handleProcessFinished(QProcess *process
     const Utils::FileName wd = workingDirectory();
     FileNameToContentsHash result;
     forEachTarget([&](const Utils::FileName &target) {
-        Utils::FileName file = wd;
-        file.appendPath(target.fileName());
+        const Utils::FileName file = wd.pathAppended(target.fileName());
         QFile generated(file.toString());
         if (!generated.open(QIODevice::ReadOnly))
             return;
diff --git a/src/plugins/remotelinux/tarpackagecreationstep.cpp b/src/plugins/remotelinux/tarpackagecreationstep.cpp
index 49fead9a59e..26ac446028c 100644
--- a/src/plugins/remotelinux/tarpackagecreationstep.cpp
+++ b/src/plugins/remotelinux/tarpackagecreationstep.cpp
@@ -119,7 +119,7 @@ void TarPackageCreationStep::addNeededDeploymentFiles(
     }
 
     for (const QString &fileName : files) {
-        const QString localFilePath = deployable.localFilePath().appendPath(fileName).toString();
+        const QString localFilePath = deployable.localFilePath().pathAppended(fileName).toString();
 
         const QString remoteDir = deployable.remoteDirectory() + '/' + fileInfo.fileName();
 
diff --git a/src/plugins/resourceeditor/resourcenode.cpp b/src/plugins/resourceeditor/resourcenode.cpp
index 764ab50269d..6a8a33783de 100644
--- a/src/plugins/resourceeditor/resourcenode.cpp
+++ b/src/plugins/resourceeditor/resourcenode.cpp
@@ -462,7 +462,7 @@ bool ResourceTopLevelNode::showInSimpleTree() const
 }
 
 ResourceFolderNode::ResourceFolderNode(const QString &prefix, const QString &lang, ResourceTopLevelNode *parent)
-    : FolderNode(FileName(parent->filePath()).appendPath(prefix)),
+    : FolderNode(parent->filePath().pathAppended(prefix)),
       // TOOD Why add existing directory doesn't work
       m_topLevelNode(parent),
       m_prefix(prefix),
diff --git a/src/plugins/tasklist/tasklistplugin.cpp b/src/plugins/tasklist/tasklistplugin.cpp
index 4c1d707309b..95b6fa9e863 100644
--- a/src/plugins/tasklist/tasklistplugin.cpp
+++ b/src/plugins/tasklist/tasklistplugin.cpp
@@ -149,7 +149,7 @@ static bool parseTaskFile(QString *errorString, const FileName &name)
             file = QDir::fromNativeSeparators(file);
             QFileInfo fi(file);
             if (fi.isRelative())
-                file = FileName(parentDir).appendPath(file).toString();
+                file = parentDir.pathAppended(file).toString();
         }
         description = unescape(description);
 
diff --git a/src/plugins/texteditor/codestylepool.cpp b/src/plugins/texteditor/codestylepool.cpp
index e1dc23df116..348b810070a 100644
--- a/src/plugins/texteditor/codestylepool.cpp
+++ b/src/plugins/texteditor/codestylepool.cpp
@@ -119,9 +119,7 @@ QString CodeStylePool::settingsDir() const
 
 Utils::FileName CodeStylePool::settingsPath(const QByteArray &id) const
 {
-    Utils::FileName path = Utils::FileName::fromString(settingsDir());
-    path.appendPath(QString::fromUtf8(id + ".xml"));
-    return path;
+    return Utils::FileName::fromString(settingsDir()).pathAppended(QString::fromUtf8(id + ".xml"));
 }
 
 QList<ICodeStylePreferences *> CodeStylePool::codeStyles() const
diff --git a/src/tools/sdktool/settings.cpp b/src/tools/sdktool/settings.cpp
index 3c567afd0ca..f70fefcf2ee 100644
--- a/src/tools/sdktool/settings.cpp
+++ b/src/tools/sdktool/settings.cpp
@@ -47,11 +47,10 @@ Settings::Settings() :
     m_instance = this;
 
     // autodetect sdk dir:
-    sdkPath = Utils::FileName::fromString(QCoreApplication::applicationDirPath());
-    sdkPath.appendPath(QLatin1String(DATA_PATH));
-    sdkPath = Utils::FileName::fromString(QDir::cleanPath(sdkPath.toString()));
-    sdkPath.appendPath(QLatin1String(Core::Constants::IDE_SETTINGSVARIANT_STR)
-                       + '/' + Core::Constants::IDE_ID);
+    sdkPath = Utils::FileName::fromString(QCoreApplication::applicationDirPath())
+            .pathAppended(DATA_PATH);
+    sdkPath = Utils::FileName::fromString(QDir::cleanPath(sdkPath.toString()))
+            .pathAppended(QLatin1String(Core::Constants::IDE_SETTINGSVARIANT_STR) + '/' + Core::Constants::IDE_ID);
 }
 
 Utils::FileName Settings::getPath(const QString &file)