Austausch Apple Duckhead 128 GB SSD original Apple 4 TB SSD 8 TB SSD OWC Express 1M2 neue original 240 GB SSD 1TB SSD Upgrade Stromkabelverlä Reinigung original Apple Lüfter iMac 27 NuPower 60 Wh original Apple OWC 2TB Aura Lautsprecher OWC 1TB Aura 500GB SSD NVMe SSD original Apple Innenreinigung Apple externes Sensor Hard Reparatur NVMe SSD neue original original Apple 2TB SSD