diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index f33f44fd6..336b85cae 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -3,7 +3,8 @@ TARGET = bitcoin-qt
 macx:TARGET = "Bitcoin-Qt"
 VERSION = 0.8.2
 INCLUDEPATH += src src/json src/qt
-QT += network
+QT += core gui network
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 DEFINES += QT_GUI BOOST_THREAD_USE_LIB BOOST_SPIRIT_THREADSAFE
 CONFIG += no_include_pwd
 CONFIG += thread
@@ -211,6 +212,7 @@ HEADERS += src/qt/bitcoingui.h \
     src/leveldb.h \
     src/threadsafety.h \
     src/limitedmap.h \
+    src/qt/macnotificationhandler.h \
     src/qt/splashscreen.h
 
 SOURCES += src/qt/bitcoin.cpp \
@@ -312,6 +314,7 @@ DEFINES += BITCOIN_QT_TEST
   macx: CONFIG -= app_bundle
 }
 
+# Todo: Remove this line when switching to Qt5, as that option was removed
 CODECFORTR = UTF-8
 
 # for lrelease/lupdate
@@ -335,6 +338,7 @@ QMAKE_EXTRA_COMPILERS += TSQM
 OTHER_FILES += README.md \
     doc/*.rst \
     doc/*.txt \
+    doc/*.md \
     src/qt/res/bitcoin-qt.rc \
     src/test/*.cpp \
     src/test/*.h \
diff --git a/doc/readme-qt.rst b/doc/readme-qt.rst
index 1bc3d701a..95cb33650 100644
--- a/doc/readme-qt.rst
+++ b/doc/readme-qt.rst
@@ -28,6 +28,12 @@ for Ubuntu >= 12.04 (please read the 'Berkely DB version warning' below):
         libboost-filesystem-dev libboost-program-options-dev libboost-thread-dev \
         libssl-dev libdb++-dev libminiupnpc-dev
 
+For Qt 5 you need the following, otherwise you get an error with lrelease when running qmake:
+
+::
+
+    apt-get install qt5-qmake libqt5gui5 libqt5core5 libqt5dbus5 qttools5-dev-tools
+
 then execute the following:
 
 ::
diff --git a/src/qt/addressbookpage.cpp b/src/qt/addressbookpage.cpp
index 8529c88b3..8906174d7 100644
--- a/src/qt/addressbookpage.cpp
+++ b/src/qt/addressbookpage.cpp
@@ -143,8 +143,13 @@ void AddressBookPage::setModel(AddressTableModel *model)
     ui->tableView->sortByColumn(0, Qt::AscendingOrder);
 
     // Set column widths
+#if QT_VERSION < 0x050000
     ui->tableView->horizontalHeader()->setResizeMode(AddressTableModel::Label, QHeaderView::Stretch);
     ui->tableView->horizontalHeader()->setResizeMode(AddressTableModel::Address, QHeaderView::ResizeToContents);
+#else
+    ui->tableView->horizontalHeader()->setSectionResizeMode(AddressTableModel::Label, QHeaderView::Stretch);
+    ui->tableView->horizontalHeader()->setSectionResizeMode(AddressTableModel::Address, QHeaderView::ResizeToContents);
+#endif
 
     connect(ui->tableView->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
             this, SLOT(selectionChanged()));
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index f525d1bb3..354c5af45 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -17,7 +17,9 @@
 #include "splashscreen.h"
 
 #include <QMessageBox>
+#if QT_VERSION < 0x050000
 #include <QTextCodec>
+#endif
 #include <QLocale>
 #include <QTimer>
 #include <QTranslator>
@@ -118,9 +120,11 @@ int main(int argc, char *argv[])
     // Command-line options take precedence:
     ParseParameters(argc, argv);
 
+#if QT_VERSION < 0x050000
     // Internal string conversion is all UTF-8
     QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
     QTextCodec::setCodecForCStrings(QTextCodec::codecForTr());
+#endif
 
     Q_INIT_RESOURCE(bitcoin);
     QApplication app(argc, argv);
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 78a69af8b..a4589860b 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -44,7 +44,9 @@
 #include <QMovie>
 #include <QTimer>
 #include <QDragEnterEvent>
+#if QT_VERSION < 0x050000
 #include <QUrl>
+#endif
 #include <QMimeData>
 #include <QStyle>
 #include <QSettings>
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 2105f0730..6937febfe 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -13,8 +13,12 @@
 #include <QDoubleValidator>
 #include <QFont>
 #include <QLineEdit>
+#if QT_VERSION >= 0x050000
+#include <QUrlQuery>
+#else
 #include <QUrl>
-#include <QTextDocument> // For Qt::escape
+#endif
+#include <QTextDocument> // for Qt::mightBeRichText
 #include <QAbstractItemView>
 #include <QClipboard>
 #include <QFileDialog>
@@ -86,7 +90,13 @@ bool parseBitcoinURI(const QUrl &uri, SendCoinsRecipient *out)
     SendCoinsRecipient rv;
     rv.address = uri.path();
     rv.amount = 0;
+
+#if QT_VERSION < 0x050000
     QList<QPair<QString, QString> > items = uri.queryItems();
+#else
+    QUrlQuery uriQuery(uri);
+    QList<QPair<QString, QString> > items = uriQuery.queryItems();
+#endif
     for (QList<QPair<QString, QString> >::iterator i = items.begin(); i != items.end(); i++)
     {
         bool fShouldReturnFalse = false;
@@ -139,7 +149,11 @@ bool parseBitcoinURI(QString uri, SendCoinsRecipient *out)
 
 QString HtmlEscape(const QString& str, bool fMultiLine)
 {
+#if QT_VERSION < 0x050000
     QString escaped = Qt::escape(str);
+#else
+    QString escaped = str.toHtmlEscaped();
+#endif
     if(fMultiLine)
     {
         escaped = escaped.replace("\n", "<br>\n");
@@ -176,7 +190,11 @@ QString getSaveFileName(QWidget *parent, const QString &caption,
     QString myDir;
     if(dir.isEmpty()) // Default to user documents location
     {
+#if QT_VERSION < 0x050000
         myDir = QDesktopServices::storageLocation(QDesktopServices::DocumentsLocation);
+#else
+        myDir = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
+#endif
     }
     else
     {
diff --git a/src/qt/macdockiconhandler.mm b/src/qt/macdockiconhandler.mm
index b6ea8e1d0..53b49c42e 100644
--- a/src/qt/macdockiconhandler.mm
+++ b/src/qt/macdockiconhandler.mm
@@ -2,8 +2,8 @@
 
 #include <QMenu>
 #include <QWidget>
-
-extern void qt_mac_set_dock_menu(QMenu*);
+#include <QTemporaryFile>
+#include <QImageWriter>
 
 #undef slots
 #include <Cocoa/Cocoa.h>
@@ -47,11 +47,11 @@ extern void qt_mac_set_dock_menu(QMenu*);
 MacDockIconHandler::MacDockIconHandler() : QObject()
 {
     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
-    this->m_dockIconClickEventHandler = [[DockIconClickEventHandler alloc] initWithDockIconHandler:this];
 
+    this->m_dockIconClickEventHandler = [[DockIconClickEventHandler alloc] initWithDockIconHandler:this];
     this->m_dummyWidget = new QWidget();
     this->m_dockMenu = new QMenu(this->m_dummyWidget);
-    qt_mac_set_dock_menu(this->m_dockMenu);
+
     [pool release];
 }
 
@@ -74,15 +74,29 @@ QMenu *MacDockIconHandler::dockMenu()
 void MacDockIconHandler::setIcon(const QIcon &icon)
 {
     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
-    NSImage *image;
+    NSImage *image = nil;
     if (icon.isNull())
         image = [[NSImage imageNamed:@"NSApplicationIcon"] retain];
     else {
+        // generate NSImage from QIcon and use this as dock icon.
         QSize size = icon.actualSize(QSize(128, 128));
         QPixmap pixmap = icon.pixmap(size);
-        CGImageRef cgImage = pixmap.toMacCGImageRef();
-        image = [[NSImage alloc] initWithCGImage:cgImage size:NSZeroSize];
-        CFRelease(cgImage);
+
+        // write temp file hack (could also be done through QIODevice [memory])
+        QTemporaryFile notificationIconFile;
+        if (!pixmap.isNull() && notificationIconFile.open()) {
+            QImageWriter writer(&notificationIconFile, "PNG");
+            if (writer.write(pixmap.toImage())) {
+                const char *cString = notificationIconFile.fileName().toUtf8().data();
+                NSString *macString = [NSString stringWithCString:cString encoding:NSUTF8StringEncoding];
+                image =  [[NSImage alloc] initWithContentsOfFile:macString];
+            }
+        }
+
+        if(!image) {
+            // if testnet image could not be created, load std. app icon
+            image = [[NSImage imageNamed:@"NSApplicationIcon"] retain];
+        }
     }
 
     [NSApp setApplicationIconImage:image];
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index a92e6fc32..0b0bce55b 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -18,7 +18,9 @@
 #include <QLocalServer>
 #include <QLocalSocket>
 #include <QStringList>
+#if QT_VERSION < 0x050000
 #include <QUrl>
+#endif
 
 using namespace boost;
 
diff --git a/src/qt/qrcodedialog.cpp b/src/qt/qrcodedialog.cpp
index ca9497512..6ddcaaf5d 100644
--- a/src/qt/qrcodedialog.cpp
+++ b/src/qt/qrcodedialog.cpp
@@ -7,7 +7,9 @@
 #include "optionsmodel.h"
 
 #include <QPixmap>
+#if QT_VERSION < 0x050000
 #include <QUrl>
+#endif
 
 #include <qrencode.h>
 
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 50f22b877..7f90f4a55 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -8,7 +8,9 @@
 #include <QTime>
 #include <QThread>
 #include <QKeyEvent>
+#if QT_VERSION < 0x050000
 #include <QUrl>
+#endif
 #include <QScrollBar>
 
 #include <openssl/crypto.h>
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index eb3ce48a6..2c7bab204 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -93,7 +93,11 @@ void SendCoinsDialog::on_sendButton_clicked()
     QStringList formatted;
     foreach(const SendCoinsRecipient &rcp, recipients)
     {
+#if QT_VERSION < 0x050000
         formatted.append(tr("<b>%1</b> to %2 (%3)").arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, rcp.amount), Qt::escape(rcp.label), rcp.address));
+#else
+        formatted.append(tr("<b>%1</b> to %2 (%3)").arg(BitcoinUnits::formatWithUnit(BitcoinUnits::BTC, rcp.amount), rcp.label.toHtmlEscaped(), rcp.address));
+#endif
     }
 
     fNewRecipientAllowed = false;
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index f8d16699c..95948a6cb 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -3,6 +3,7 @@
 #include "util.h"
 
 #include <QPainter>
+#undef loop /* ugh, remove this when the #define loop is gone from util.h */
 #include <QApplication>
 
 SplashScreen::SplashScreen(const QPixmap &pixmap, Qt::WindowFlags f) :
diff --git a/src/qt/transactionview.cpp b/src/qt/transactionview.cpp
index 9240b71c7..a43e29c47 100644
--- a/src/qt/transactionview.cpp
+++ b/src/qt/transactionview.cpp
@@ -176,7 +176,11 @@ void TransactionView::setModel(WalletModel *model)
         transactionView->horizontalHeader()->resizeSection(TransactionTableModel::Status, 23);
         transactionView->horizontalHeader()->resizeSection(TransactionTableModel::Date, 120);
         transactionView->horizontalHeader()->resizeSection(TransactionTableModel::Type, 120);
+#if QT_VERSION < 0x050000
         transactionView->horizontalHeader()->setResizeMode(TransactionTableModel::ToAddress, QHeaderView::Stretch);
+#else
+        transactionView->horizontalHeader()->setSectionResizeMode(TransactionTableModel::ToAddress, QHeaderView::Stretch);
+#endif
         transactionView->horizontalHeader()->resizeSection(TransactionTableModel::Amount, 100);
     }
 }
diff --git a/src/qt/walletframe.cpp b/src/qt/walletframe.cpp
index 83e4255c9..50c03ac62 100644
--- a/src/qt/walletframe.cpp
+++ b/src/qt/walletframe.cpp
@@ -8,11 +8,9 @@
 #include "bitcoingui.h"
 #include "walletstack.h"
 
-#include <QVBoxLayout>
+#include <QHBoxLayout>
 #include <QMessageBox>
 
-#include <stdio.h>
-
 WalletFrame::WalletFrame(BitcoinGUI *_gui) :
     QFrame(_gui),
     gui(_gui),
diff --git a/src/qt/walletframe.h b/src/qt/walletframe.h
index 3649185e8..d7092f987 100644
--- a/src/qt/walletframe.h
+++ b/src/qt/walletframe.h
@@ -17,8 +17,9 @@ class WalletStack;
 class WalletFrame : public QFrame
 {
     Q_OBJECT
+
 public:
-    explicit WalletFrame(BitcoinGUI *_gui);
+    explicit WalletFrame(BitcoinGUI *_gui = 0);
     ~WalletFrame();
 
     void setClientModel(ClientModel *clientModel);
diff --git a/src/qt/walletstack.h b/src/qt/walletstack.h
index ea4cc121d..506d595c0 100644
--- a/src/qt/walletstack.h
+++ b/src/qt/walletstack.h
@@ -40,6 +40,7 @@ QT_END_NAMESPACE
 class WalletStack : public QStackedWidget
 {
     Q_OBJECT
+
 public:
     explicit WalletStack(QWidget *parent = 0);
     ~WalletStack();
diff --git a/src/qt/walletview.cpp b/src/qt/walletview.cpp
index 6d44c174b..277c05669 100644
--- a/src/qt/walletview.cpp
+++ b/src/qt/walletview.cpp
@@ -21,7 +21,11 @@
 #include <QHBoxLayout>
 #include <QVBoxLayout>
 #include <QAction>
+#if QT_VERSION < 0x050000
 #include <QDesktopServices>
+#else
+#include <QStandardPaths>
+#endif
 #include <QFileDialog>
 #include <QPushButton>
 
@@ -232,7 +236,11 @@ void WalletView::encryptWallet(bool status)
 
 void WalletView::backupWallet()
 {
+#if QT_VERSION < 0x050000
     QString saveDir = QDesktopServices::storageLocation(QDesktopServices::DocumentsLocation);
+#else
+    QString saveDir = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
+#endif
     QString filename = QFileDialog::getSaveFileName(this, tr("Backup Wallet"), saveDir, tr("Wallet Data (*.dat)"));
     if (!filename.isEmpty()) {
         if (!walletModel->backupWallet(filename)) {