Unlike newer versions, Pro 2 has a very light CPU footprint, making it ideal for older MacBooks (Intel-based) that might struggle with the real-time stem separation found in Traktor Pro 4 Integration: It pairs perfectly with legacy NI hardware like the Kontrol S2

Modern macOS versions try to save power by putting apps to sleep. Right-click the Traktor icon in your Applications folder, select "Get Info," and check "Prevent App Nap."