diff --git a/Sources/Keyboard/MIDIMonitorKeyboard.swift b/Sources/Keyboard/MIDIMonitorKeyboard.swift
index c5665a3..b92257b 100644
--- a/Sources/Keyboard/MIDIMonitorKeyboard.swift
+++ b/Sources/Keyboard/MIDIMonitorKeyboard.swift
@@ -2,13 +2,15 @@
 import SwiftUI
 import Tonic
 
+@available(iOS 15, macOS 12, *)
 extension GraphicsContext {
     func fill(rect: CGRect, with color: Color) {
         fill(Path(roundedRect: rect, cornerRadius: 0), with: GraphicsContext.Shading.color(color))
     }
 }
 
-public struct MIDIMonitorKeyboard: View {
+@available(iOS 15, macOS 12, *)
+struct MIDIMonitorKeyboard: View {
 
     var layout: KeyboardLayout
     var activatedPitches: PitchSet
@@ -87,9 +89,13 @@ public struct MIDIMonitorKeyboard: View {
 }
 
 var p = PitchSet(pitches: [Pitch(65), Pitch(68), Pitch(71), Pitch(74)])
+
+// Removing Preview macro until Xcode 15 is released
+/*
 #Preview {
     MIDIMonitorKeyboard(layout: .piano(pitchRange: Pitch(61)...Pitch(88)),
                         activatedPitches: p,
                         colorFunction: { x in Color(cgColor: PitchColor.helmholtz[Int(x.pitchClass)])}
     ).frame(width: 600, height: 100)
 }
+*/