I can sell with either Catalina installed or Big Sur - Your Choice Mid-2012 Model (Purchased in Early 2014) 2.9 GHz (TurboBoost to 3.6 GHz) 8 GB System Memory (RAM) 500 GB Brand New SSD 750 Hard Disk Drive 13.3" Widescreen 1280 x 800 Second Display: The maximum resolution supported on an external display is 2560x1600 8x Dual-Layer Superdrive (Optical CD/DVD Rom) SDXC Card Slot AirPort Extreme (802.11a/b/g/n) Bluetooth 4.0 USB 3.0 x 2 Firewire 800 7 Hour Battery 4.5 Pounds Delivery could be possible...