diff --git a/README.md b/README.md
index 50c5f7e..a00e70c 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ Why reinvent this particular wheel?
     * Explorer shell not required
     * works in Server Core
   * Unicode support
+  * High DPI support (no manifest required)
   * WSL/Cygwin/MSYS2 [support](https://github.com/ncruces/zenity/wiki/Zenity-for-WSL,-Cygwin,-MSYS2)
 * on macOS:
   * only dependency is `osascript`
diff --git a/entry_darwin.go b/entry_darwin.go
index 6230658..4867ca6 100644
--- a/entry_darwin.go
+++ b/entry_darwin.go
@@ -15,34 +15,8 @@ func entry(text string, opts options) (string, bool, error) {
 	data.Options.Answer = &opts.entryText
 	data.Options.Hidden = opts.hideText
 	data.Options.Timeout = zenutil.Timeout
-
-	switch opts.icon {
-	case ErrorIcon:
-		data.Options.Icon = "stop"
-	case WarningIcon:
-		data.Options.Icon = "caution"
-	case InfoIcon, QuestionIcon:
-		data.Options.Icon = "note"
-	}
-
-	if opts.okLabel != nil || opts.cancelLabel != nil || opts.extraButton != nil {
-		if opts.okLabel == nil {
-			opts.okLabel = stringPtr("OK")
-		}
-		if opts.cancelLabel == nil {
-			opts.cancelLabel = stringPtr("Cancel")
-		}
-		if opts.extraButton == nil {
-			data.Options.Buttons = []string{*opts.cancelLabel, *opts.okLabel}
-			data.Options.Default = 2
-			data.Options.Cancel = 1
-		} else {
-			data.Options.Buttons = []string{*opts.extraButton, *opts.cancelLabel, *opts.okLabel}
-			data.Options.Default = 3
-			data.Options.Cancel = 2
-		}
-		data.Extra = opts.extraButton
-	}
+	data.Options.Icon = opts.icon.String()
+	data.SetButtons(getButtons(true, true, opts))
 
 	out, err := zenutil.Run(opts.ctx, "dialog", data)
 	out = bytes.TrimSuffix(out, []byte{'\n'})
diff --git a/internal/zenutil/run_darwin.go b/internal/zenutil/run_darwin.go
index e84f134..bd7f392 100644
--- a/internal/zenutil/run_darwin.go
+++ b/internal/zenutil/run_darwin.go
@@ -97,3 +97,20 @@ type NotifyOptions struct {
 	Title    *string `json:"withTitle,omitempty"`
 	Subtitle string  `json:"subtitle,omitempty"`
 }
+
+type Buttons struct {
+	Buttons []string
+	Default int
+	Cancel  int
+	Extra   int
+}
+
+func (d *Dialog) SetButtons(btns Buttons) {
+	d.Options.Buttons = btns.Buttons
+	d.Options.Default = btns.Default
+	d.Options.Cancel = btns.Cancel
+	if btns.Extra > 0 {
+		name := btns.Buttons[btns.Extra-1]
+		d.Extra = &name
+	}
+}
diff --git a/msg_darwin.go b/msg_darwin.go
index 3c40d0a..3cc4a34 100644
--- a/msg_darwin.go
+++ b/msg_darwin.go
@@ -23,82 +23,17 @@ func message(kind messageKind, text string, opts options) (bool, error) {
 	if dialog {
 		data.Operation = "displayDialog"
 		data.Options.Title = opts.title
-
-		switch opts.icon {
-		case ErrorIcon:
-			data.Options.Icon = "stop"
-		case WarningIcon:
-			data.Options.Icon = "caution"
-		case InfoIcon, QuestionIcon:
-			data.Options.Icon = "note"
-		}
+		data.Options.Icon = opts.icon.String()
 	} else {
 		data.Operation = "displayAlert"
+		data.Options.As = kind.String()
 		if opts.title != nil {
 			data.Text = *opts.title
 			data.Options.Message = text
 		}
-
-		switch kind {
-		case infoKind:
-			data.Options.As = "informational"
-		case warningKind:
-			data.Options.As = "warning"
-		case errorKind:
-			data.Options.As = "critical"
-		}
 	}
 
-	if kind == questionKind {
-		// alert defaults to a single button, we need two
-		if opts.cancelLabel == nil && !dialog {
-			opts.cancelLabel = stringPtr("Cancel")
-		}
-	} else {
-		// dialog defaults to two buttons, we need one
-		if opts.okLabel == nil && dialog {
-			opts.okLabel = stringPtr("OK")
-		}
-		// only questions have cancel
-		opts.cancelLabel = nil
-	}
-
-	if opts.okLabel != nil || opts.cancelLabel != nil || opts.extraButton != nil {
-		if opts.okLabel == nil {
-			opts.okLabel = stringPtr("OK")
-		}
-		if kind == questionKind {
-			if opts.cancelLabel == nil {
-				opts.cancelLabel = stringPtr("Cancel")
-			}
-			if opts.extraButton == nil {
-				data.Options.Buttons = []string{*opts.cancelLabel, *opts.okLabel}
-				data.Options.Default = 2
-				data.Options.Cancel = 1
-			} else {
-				data.Options.Buttons = []string{*opts.extraButton, *opts.cancelLabel, *opts.okLabel}
-				data.Options.Default = 3
-				data.Options.Cancel = 2
-			}
-		} else {
-			if opts.extraButton == nil {
-				data.Options.Buttons = []string{*opts.okLabel}
-				data.Options.Default = 1
-			} else {
-				data.Options.Buttons = []string{*opts.extraButton, *opts.okLabel}
-				data.Options.Default = 2
-			}
-		}
-		data.Extra = opts.extraButton
-	}
-
-	if kind == questionKind && opts.defaultCancel {
-		if data.Options.Cancel != 0 {
-			data.Options.Default = data.Options.Cancel
-		} else {
-			data.Options.Default = 1
-		}
-	}
+	data.SetButtons(getButtons(dialog, kind == questionKind, opts))
 
 	out, err := zenutil.Run(opts.ctx, "dialog", data)
 	if err, ok := err.(*exec.ExitError); ok && err.ExitCode() == 1 {
diff --git a/util_darwin.go b/util_darwin.go
new file mode 100644
index 0000000..8a79755
--- /dev/null
+++ b/util_darwin.go
@@ -0,0 +1,75 @@
+package zenity
+
+import "github.com/ncruces/zenity/internal/zenutil"
+
+func getButtons(dialog, okcancel bool, opts options) (btns zenutil.Buttons) {
+	if !okcancel {
+		opts.cancelLabel = nil
+		opts.defaultCancel = false
+	}
+
+	if opts.okLabel != nil || opts.cancelLabel != nil || opts.extraButton != nil || (dialog != okcancel) {
+		if opts.okLabel == nil {
+			opts.okLabel = stringPtr("OK")
+		}
+		if okcancel {
+			if opts.cancelLabel == nil {
+				opts.cancelLabel = stringPtr("Cancel")
+			}
+			if opts.extraButton == nil {
+				btns.Buttons = []string{*opts.cancelLabel, *opts.okLabel}
+				btns.Default = 2
+				btns.Cancel = 1
+			} else {
+				btns.Buttons = []string{*opts.extraButton, *opts.cancelLabel, *opts.okLabel}
+				btns.Default = 3
+				btns.Cancel = 2
+				btns.Extra = 1
+			}
+		} else {
+			if opts.extraButton == nil {
+				btns.Buttons = []string{*opts.okLabel}
+				btns.Default = 1
+			} else {
+				btns.Buttons = []string{*opts.extraButton, *opts.okLabel}
+				btns.Default = 2
+				btns.Extra = 1
+			}
+		}
+	}
+
+	if opts.defaultCancel {
+		if btns.Cancel != 0 {
+			btns.Default = btns.Cancel
+		} else {
+			btns.Default = 1
+		}
+	}
+	return
+}
+
+func (i DialogIcon) String() string {
+	switch i {
+	case ErrorIcon:
+		return "stop"
+	case WarningIcon:
+		return "caution"
+	case InfoIcon, QuestionIcon:
+		return "note"
+	default:
+		return ""
+	}
+}
+
+func (k messageKind) String() string {
+	switch k {
+	case infoKind:
+		return "informational"
+	case warningKind:
+		return "warning"
+	case errorKind:
+		return "critical"
+	default:
+		return ""
+	}
+}