diff --git a/src/libs/utils/detailsbutton.cpp b/src/libs/utils/detailsbutton.cpp
index b888f142075..a0d29afb2d4 100644
--- a/src/libs/utils/detailsbutton.cpp
+++ b/src/libs/utils/detailsbutton.cpp
@@ -74,14 +74,18 @@ void FadingPanel::fadeTo(float value)
 DetailsButton::DetailsButton(QWidget *parent) : QAbstractButton(parent), m_fader(0)
 {
     setCheckable(true);
-    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
+    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::MinimumExpanding);
     setText(tr("Details"));
 }
 
 QSize DetailsButton::sizeHint() const
 {
     // TODO: Adjust this when icons become available!
+#ifdef Q_WS_MAC
+    return QSize(80, 34);
+#else
     return QSize(80, 22);
+#endif
 }
 
 bool DetailsButton::event(QEvent *e)
diff --git a/src/libs/utils/detailswidget.cpp b/src/libs/utils/detailswidget.cpp
index adc0cc2262b..222a786c962 100644
--- a/src/libs/utils/detailswidget.cpp
+++ b/src/libs/utils/detailswidget.cpp
@@ -110,6 +110,7 @@ namespace Utils {
 
         d->m_summaryCheckBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
         d->m_summaryCheckBox->setContentsMargins(MARGIN, MARGIN, MARGIN, MARGIN);
+        d->m_summaryCheckBox->setAttribute(Qt::WA_LayoutUsesWidgetRect); /* broken layout on mac otherwise */
         d->m_summaryCheckBox->setVisible(false);
 
         d->m_additionalSummaryLabel->setTextInteractionFlags(Qt::TextSelectableByMouse);
@@ -325,8 +326,13 @@ namespace Utils {
         pixmap.fill(Qt::transparent);
         QPainter p(&pixmap);
 
-        QRect topRect(0, 0, size.width(), d->m_useCheckBox ? d->m_summaryCheckBox->height() : d->m_summaryLabel->height());
+        int topHeight = qMax(d->m_detailsButton->height(),
+                             d->m_useCheckBox ? d->m_summaryCheckBox->height() : d->m_summaryLabel->height());
+        QRect topRect(0, 0, size.width(), topHeight);
         QRect fullRect(0, 0, size.width(), size.height());
+#ifdef Q_WS_MAC
+        p.fillRect(fullRect, qApp->palette().window().color());
+#endif
         p.fillRect(fullRect, QColor(255, 255, 255, 40));
 
         QColor highlight = palette().highlight().color();
diff --git a/src/plugins/qt4projectmanager/qt4target.cpp b/src/plugins/qt4projectmanager/qt4target.cpp
index 1d919c86334..793348b5690 100644
--- a/src/plugins/qt4projectmanager/qt4target.cpp
+++ b/src/plugins/qt4projectmanager/qt4target.cpp
@@ -324,8 +324,8 @@ Qt4DefaultTargetSetupWidget::Qt4DefaultTargetSetupWidget(Qt4BaseTargetFactory *f
 
     setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
     QVBoxLayout *vboxLayout = new QVBoxLayout();
-    vboxLayout->setMargin(0);
     setLayout(vboxLayout);
+    vboxLayout->setContentsMargins(0, 0, 0, 0);
     m_detailsWidget = new Utils::DetailsWidget(this);
     m_detailsWidget->setSummaryText(factory->displayNameForId(id));
     m_detailsWidget->setUseCheckBox(true);
@@ -338,12 +338,18 @@ Qt4DefaultTargetSetupWidget::Qt4DefaultTargetSetupWidget(Qt4BaseTargetFactory *f
     QWidget *widget = new QWidget;
     QVBoxLayout *layout = new QVBoxLayout;
     widget->setLayout(layout);
+    layout->setContentsMargins(0, 0, 0, 0);
 
+    QWidget *w = new QWidget;
     m_importLayout = new QGridLayout;
     m_importLayout->setMargin(0);
-    layout->addLayout(m_importLayout);
+    w->setLayout(m_importLayout);
+    layout->addWidget(w);
 
+    w = new QWidget;
     m_importLineLayout = new QHBoxLayout();
+    m_importLineLayout->setContentsMargins(0, 0, 0, 0);
+    w->setLayout(m_importLineLayout);
     m_importLineLabel = new QLabel();
     m_importLineLabel->setText(tr("Add build from:"));
     m_importLineLayout->addWidget(m_importLineLabel);
@@ -355,34 +361,31 @@ Qt4DefaultTargetSetupWidget::Qt4DefaultTargetSetupWidget(Qt4BaseTargetFactory *f
 
     m_importLineButton = new QPushButton;
     m_importLineButton->setText(tr("Add Build"));
+    m_importLineButton->setAttribute(Qt::WA_MacSmallSize);
+    // make it in line with import path chooser button on mac
+    m_importLineButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
     m_importLineLayout->addWidget(m_importLineButton);
     m_importLineLayout->addStretch();
-    layout->addLayout(m_importLineLayout);
+    layout->addWidget(w);
 
     m_importLineLabel->setVisible(false);
     m_importLinePath->setVisible(false);
     m_importLineButton->setVisible(m_showImport);
 
-    m_spacerTopWidget = new QWidget;
-    m_spacerTopWidget->setMinimumHeight(12);
-    layout->addWidget(m_spacerTopWidget);
-
     m_shadowBuildEnabled = new QCheckBox;
     m_shadowBuildEnabled->setText(tr("Use Shadow Building"));
     m_shadowBuildEnabled->setChecked(true);
     m_shadowBuildEnabled->setVisible(false);
     layout->addWidget(m_shadowBuildEnabled);
 
-    m_spacerBottomWidget = new QWidget;
-    m_spacerBottomWidget->setMinimumHeight(0);
-    layout->addWidget(m_spacerBottomWidget);
-
+    w = new QWidget;
     m_newBuildsLayout = new QGridLayout;
     m_newBuildsLayout->setMargin(0);
-    layout->addLayout(m_newBuildsLayout);
-
-    m_spacerTopWidget->setVisible(false);
-    m_spacerBottomWidget->setVisible(false);
+#ifdef Q_WS_MAC
+    m_newBuildsLayout->setSpacing(0);
+#endif
+    w->setLayout(m_newBuildsLayout);
+    layout->addWidget(w);
 
     m_detailsWidget->setWidget(widget);
 
@@ -456,8 +459,6 @@ void Qt4DefaultTargetSetupWidget::setProFilePath(const QString &proFilePath)
 void Qt4DefaultTargetSetupWidget::setShadowBuildCheckBoxVisible(bool b)
 {
     m_shadowBuildEnabled->setVisible(b);
-    m_spacerTopWidget->setVisible(b && !m_importInfos.isEmpty());
-    m_spacerBottomWidget->setVisible(b);
     m_shadowBuildEnabled->setChecked(!m_hasInSourceBuild);
 }
 
@@ -488,6 +489,7 @@ void Qt4DefaultTargetSetupWidget::addImportClicked()
     if (!m_importLineLabel->isVisible()) {
         m_importLineLabel->setVisible(true);
         m_importLinePath->setVisible(true);
+        m_importLineButton->setAttribute(Qt::WA_MacNormalSize);
         return;
     }
     BuildConfigurationInfo info = BuildConfigurationInfo::checkForBuild(m_importLinePath->path(), m_proFilePath);
@@ -614,6 +616,7 @@ void Qt4DefaultTargetSetupWidget::setupWidgets()
         QCheckBox *checkbox = new QCheckBox;
         checkbox->setText(displayNameFrom(info));
         checkbox->setChecked(m_enabled.at(i));
+        checkbox->setAttribute(Qt::WA_LayoutUsesWidgetRect);
         if (info.version)
             checkbox->setToolTip(info.version->toHtml(false));
         m_newBuildsLayout->addWidget(checkbox, i * 2, 0);
diff --git a/src/plugins/qt4projectmanager/qt4target.h b/src/plugins/qt4projectmanager/qt4target.h
index 699995289e6..b8262f7b6a1 100644
--- a/src/plugins/qt4projectmanager/qt4target.h
+++ b/src/plugins/qt4projectmanager/qt4target.h
@@ -147,8 +147,6 @@ private:
     QGridLayout *m_importLayout;
     QGridLayout *m_newBuildsLayout;
     QCheckBox *m_shadowBuildEnabled;
-    QWidget *m_spacerTopWidget;
-    QWidget *m_spacerBottomWidget;
 
     // import line widgets
     QHBoxLayout *m_importLineLayout;