diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -1415,19 +1415,19 @@
 
 void BitcoinGUI::showProgress(const QString &title, int nProgress) {
     if (nProgress == 0) {
-        progressDialog = new QProgressDialog(title, "", 0, 100);
+        progressDialog = new QProgressDialog(title, QString(), 0, 100);
+        GUIUtil::PolishProgressDialog(progressDialog);
         progressDialog->setWindowModality(Qt::ApplicationModal);
         progressDialog->setMinimumDuration(0);
-        progressDialog->setCancelButton(nullptr);
         progressDialog->setAutoClose(false);
         progressDialog->setValue(0);
-    } else if (progressDialog) {
-        if (nProgress == 100) {
+    } else if (nProgress == 100) {
+        if (progressDialog) {
             progressDialog->close();
             progressDialog->deleteLater();
-        } else {
-            progressDialog->setValue(nProgress);
         }
+    } else if (progressDialog) {
+        progressDialog->setValue(nProgress);
     }
 }
 
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -32,6 +32,7 @@
 class QDateTime;
 class QFont;
 class QLineEdit;
+class QProgressDialog;
 class QUrl;
 class QWidget;
 QT_END_NAMESPACE
@@ -295,6 +296,9 @@
  * introduced.
  */
 int TextWidth(const QFontMetrics &fm, const QString &text);
+
+// Fix known bugs in QProgressDialog class.
+void PolishProgressDialog(QProgressDialog *dialog);
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -47,9 +47,11 @@
 #include <QFileDialog>
 #include <QFont>
 #include <QFontDatabase>
+#include <QFontMetrics>
 #include <QKeyEvent>
 #include <QLineEdit>
 #include <QMouseEvent>
+#include <QProgressDialog>
 #include <QSettings>
 #include <QTextDocument> // for Qt::mightBeRichText
 #include <QThread>
@@ -972,4 +974,15 @@
 #endif
 }
 
+void PolishProgressDialog(QProgressDialog *dialog) {
+#ifdef Q_OS_MAC
+    // Workaround for macOS-only Qt bug; see: QTBUG-65750, QTBUG-70357.
+    const int margin = dialog->fontMetrics().width("X");
+    dialog->resize(dialog->width() + 2 * margin, dialog->height());
+    dialog->show();
+#else
+    Q_UNUSED(dialog);
+#endif
+}
+
 } // namespace GUIUtil
diff --git a/src/qt/walletview.cpp b/src/qt/walletview.cpp
--- a/src/qt/walletview.cpp
+++ b/src/qt/walletview.cpp
@@ -343,12 +343,12 @@
 
 void WalletView::showProgress(const QString &title, int nProgress) {
     if (nProgress == 0) {
-        progressDialog = new QProgressDialog(title, "", 0, 100);
+        progressDialog = new QProgressDialog(title, tr("Cancel"), 0, 100);
+        GUIUtil::PolishProgressDialog(progressDialog);
         progressDialog->setWindowModality(Qt::ApplicationModal);
         progressDialog->setMinimumDuration(0);
         progressDialog->setAutoClose(false);
         progressDialog->setValue(0);
-        progressDialog->setCancelButtonText(tr("Cancel"));
     } else if (nProgress == 100) {
         if (progressDialog) {
             progressDialog->close();