diff --git a/pkg/tui/components/editor/editor.go b/pkg/tui/components/editor/editor.go
index a4e1fbcf5..a1c306979 100644
--- a/pkg/tui/components/editor/editor.go
+++ b/pkg/tui/components/editor/editor.go
@@ -771,6 +771,16 @@ func (e *editor) Update(msg tea.Msg) (layout.Model, tea.Cmd) {
 				return e, nil
 			}
 
+			// On macOS, terminals like Terminal.app don't support the Kitty keyboard
+			// protocol, so Shift+Enter sends the same byte as Enter. Use the macOS
+			// CoreGraphics API to check if Shift is physically held, and treat it
+			// as a newline insertion.
+			if msg.String() == "enter" && termfeatures.IsShiftPressed() {
+				e.textarea.InsertString("\n")
+				e.refreshSuggestion()
+				return e, nil
+			}
+
 			// Let textarea process the key - it handles newlines via InsertNewline binding
 			prev := e.textarea.Value()
 			e.textarea, _ = e.textarea.Update(msg)
diff --git a/pkg/tui/internal/termfeatures/keyboard.go b/pkg/tui/internal/termfeatures/keyboard.go
index dc0d64efb..f59a60e4f 100644
--- a/pkg/tui/internal/termfeatures/keyboard.go
+++ b/pkg/tui/internal/termfeatures/keyboard.go
@@ -1,10 +1,19 @@
 package termfeatures
 
-import "strings"
+import (
+	"runtime"
+	"strings"
+)
 
 // SupportsModifiedEnter returns true for terminals that can distinguish
 // Shift+Enter from Enter even when they do not report Kitty keyboard flags.
+// On macOS, we use the CoreGraphics API to detect modifier key state at the
+// system level, so all terminals effectively support this.
 func SupportsModifiedEnter(getenv func(string) string) bool {
+	if runtime.GOOS == "darwin" {
+		return true
+	}
+
 	if getenv == nil {
 		return false
 	}
diff --git a/pkg/tui/internal/termfeatures/keyboard_test.go b/pkg/tui/internal/termfeatures/keyboard_test.go
index e2bed09e5..b82e9e426 100644
--- a/pkg/tui/internal/termfeatures/keyboard_test.go
+++ b/pkg/tui/internal/termfeatures/keyboard_test.go
@@ -1,6 +1,9 @@
 package termfeatures
 
-import "testing"
+import (
+	"runtime"
+	"testing"
+)
 
 func TestSupportsModifiedEnter(t *testing.T) {
 	t.Parallel()
@@ -14,8 +17,8 @@ func TestSupportsModifiedEnter(t *testing.T) {
 		{name: "wezterm pane", env: map[string]string{"WEZTERM_PANE": "1"}, want: true},
 		{name: "wezterm socket", env: map[string]string{"WEZTERM_UNIX_SOCKET": "/tmp/wezterm.sock"}, want: true},
 		{name: "wezterm term", env: map[string]string{"TERM": "wezterm"}, want: true},
-		{name: "other terminal", env: map[string]string{"TERM_PROGRAM": "Apple_Terminal", "TERM": "xterm-256color"}, want: false},
-		{name: "nil getenv", env: nil, want: false},
+		{name: "other terminal", env: map[string]string{"TERM_PROGRAM": "Apple_Terminal", "TERM": "xterm-256color"}, want: runtime.GOOS == "darwin"},
+		{name: "nil getenv", env: nil, want: runtime.GOOS == "darwin"},
 	}
 
 	for _, tt := range tests {
diff --git a/pkg/tui/internal/termfeatures/modifiers_darwin.go b/pkg/tui/internal/termfeatures/modifiers_darwin.go
new file mode 100644
index 000000000..f8c23bcf1
--- /dev/null
+++ b/pkg/tui/internal/termfeatures/modifiers_darwin.go
@@ -0,0 +1,23 @@
+//go:build darwin
+
+package termfeatures
+
+/*
+#cgo LDFLAGS: -framework CoreGraphics
+#include <CoreGraphics/CoreGraphics.h>
+
+static int isShiftPressed() {
+    CGEventFlags flags = CGEventSourceFlagsState(kCGEventSourceStateCombinedSessionState);
+    return (flags & kCGEventFlagMaskShift) != 0;
+}
+*/
+import "C"
+
+// IsShiftPressed queries the macOS CoreGraphics event system to determine
+// whether the Shift key is currently held down. This allows us to distinguish
+// Shift+Enter from Enter in terminals that don't support the Kitty keyboard
+// protocol (like macOS Terminal.app), since those terminals send the same byte
+// for both key combinations.
+func IsShiftPressed() bool {
+	return C.isShiftPressed() != 0
+}
diff --git a/pkg/tui/internal/termfeatures/modifiers_other.go b/pkg/tui/internal/termfeatures/modifiers_other.go
new file mode 100644
index 000000000..fe8b029bd
--- /dev/null
+++ b/pkg/tui/internal/termfeatures/modifiers_other.go
@@ -0,0 +1,9 @@
+//go:build !darwin
+
+package termfeatures
+
+// IsShiftPressed returns false on non-macOS platforms. The CoreGraphics-based
+// modifier detection is only available on macOS.
+func IsShiftPressed() bool {
+	return false
+}