It's "Qt Creator" and that should reflect in the App name on Mac.

doc/doc.pri

@@ -46,8 +46,8 @@ unix:!macx {
 }
 
 macx {
-    DOC_DIR = $${OUT_PWD}/bin/QtCreator.app/Contents/Resources/doc 
-    cp_docs.commands = mkdir -p $${DOC_DIR} ; $${QMAKE_COPY} $${QCH_FILE} $${DOC_DIR}
+    DOC_DIR = "$${OUT_PWD}/bin/Qt Creator.app/Contents/Resources/doc"
+    cp_docs.commands = mkdir -p \"$${DOC_DIR}\" ; $${QMAKE_COPY} \"$${QCH_FILE}\" \"$${DOC_DIR}\"
     cp_docs.depends += qch_docs
     docs.depends = cp_docs
     QMAKE_EXTRA_TARGETS += html_docs qch_docs cp_docs docs

qtcreator.pri

@@ -55,7 +55,7 @@ isEmpty(IDE_BUILD_TREE) {
 }
 IDE_APP_PATH = $$IDE_BUILD_TREE/bin
 macx {
-    IDE_APP_TARGET   = QtCreator
+    IDE_APP_TARGET   = "Qt Creator"
     IDE_LIBRARY_PATH = $$IDE_APP_PATH/$${IDE_APP_TARGET}.app/Contents/PlugIns
     IDE_PLUGIN_PATH  = $$IDE_LIBRARY_PATH
     IDE_LIBEXEC_PATH = $$IDE_APP_PATH/$${IDE_APP_TARGET}.app/Contents/Resources

share/qtcreator/static.pro

@@ -41,7 +41,7 @@ DATA_DIRS = \
     copy2build.input = FILES
     copy2build.output = $$IDE_DATA_PATH/${QMAKE_FUNC_FILE_IN_stripSrcDir}
     isEmpty(vcproj):copy2build.variable_out = PRE_TARGETDEPS
-    copy2build.commands = $$QMAKE_COPY \"${QMAKE_FILE_IN}\" \"${QMAKE_FILE_OUT}\"
+    copy2build.commands = $$QMAKE_COPY ${QMAKE_FILE_IN} ${QMAKE_FILE_OUT}
     copy2build.name = COPY ${QMAKE_FILE_IN}
     copy2build.CONFIG += no_link
     QMAKE_EXTRA_COMPILERS += copy2build
@@ -49,7 +49,7 @@ DATA_DIRS = \
     macx {
         run_in_term.target = $$IDE_DATA_PATH/runInTerminal.command
         run_in_term.depends = $$PWD/runInTerminal.command
-        run_in_term.commands = $$QMAKE_COPY $< $@
+        run_in_term.commands = $$QMAKE_COPY \"$<\" \"$@\"
         QMAKE_EXTRA_TARGETS += run_in_term
         PRE_TARGETDEPS += $$run_in_term.target
         QMAKE_CLEAN += $$run_in_term.target

src/qtcreatorplugin.pri

@@ -18,7 +18,7 @@ PLUGINSPECS = $${_PRO_FILE_PWD_}/$${TARGET}.pluginspec
 copy2build.input = PLUGINSPECS
 copy2build.output = $$DESTDIR/${QMAKE_FUNC_FILE_IN_stripSrcDir}
 isEmpty(vcproj):copy2build.variable_out = PRE_TARGETDEPS
-copy2build.commands = $$QMAKE_COPY \"${QMAKE_FILE_IN}\" \"${QMAKE_FILE_OUT}\"
+copy2build.commands = $$QMAKE_COPY ${QMAKE_FILE_IN} ${QMAKE_FILE_OUT}
 copy2build.name = COPY ${QMAKE_FILE_IN}
 copy2build.CONFIG += no_link
 QMAKE_EXTRA_COMPILERS += copy2build