+5,000 yen, Windows 11 Pro can be installed via Bootcamp. +10,000 yen, Windows 11 Pro can be installed using the paid virtual machine software "Parallels Desktop 20". +5,000 yen, Mac version of Office can be installed. The Office account and password will be provided. If you make an immediate purchase without price negotiation, Office will be installed for free. +5,000 yen, Windows version of Office can be installed. +10,000 yen, the SSD can be upgraded to 1TB. +20,000 yen, the SSD can be upgraded to 2TB. ※ Product Description ※ Manufacturer: Apple Product Name (Model Number): MacBook Pro Retina [A1398] CPU: Core i7-4870HQ 2.50-3.70 GHz (4 cores / 8 threads) Memory: 16GB (16384MB) Storage (SSD): Ultra-fast PCI-e NVMe SSD 512GB Optical Drive: None Screen Size: Retina display 15.4-inch wide Resolution: 2,880x1,800 dots Wireless LAN: Built-in wireless LAN Keyboard: Japanese layout (with backlight) OS System: Catalina 10.15.7 / Windows 11 Pro 64bit ● Included Accessories AC adapter, built-in battery ※ Some of the accessories may not be genuine. ■ Product Condition There is some coating peeling on the LCD screen. The keyboard is in a clean condition, with no fading of the characters. There are scratches on the front of the palm rest on the right side. There are some scratches on the top cover and bottom cover. The battery has been charged and discharged 166 times. The initial password is 1234. ※ Notes We will accept returns or exchanges for defects that prevent the device from powering on or starting up. Other than that, we cannot accept returns for reasons related to the product condition, so please refrain from purchasing if you are particular about the product condition.