2011 MacBook Air. 【macOS】High Sierra 10.13.6 【Model Number】A1370 【Screen Size】11.6 inches 【Color】Silver 【Processor】1.8 GHz Dual-Core Intel Core i7 【Memory】4GB 1333 MHz DDR3 【Storage】256GB Flash Storage 【Graphics】Intel HD Graphics 3000 processor (shared 384MB DDR3 SDRAM with main memory) 【Serial Number】C02G478KDJY9 ※ This is the top-of-the-line 2011 MacBook Air model in terms of processor, memory, and storage. The body was always carried in a genuine leather envelope-style cover, so I believe there are no scratches on the body (including the LCD screen) (please check the photos). However, there are some scuffs on the rubber feet on the bottom (photo 15), depending on the light. The keyboard is in clean condition because it was always covered with a soft cover (photo 3). The battery was replaced with a new one in 2023. Please confirm that the battery is not swollen (photos 12 and 13). This machine has the maximum possible system update (10.13.6) (initial setup has not been done - photo 2). At that time, "Install macOS High Sierra" was created using a special method (using "Terminal") to install the system. For future considerations, such as when troubleshooting or replacing storage, "Install macOS High Sierra" will be included on a USB memory stick so that the system can be reinstalled. (The original OS, "10.7 Lion," could not be reinstalled via an internet connection.) ※ To make effective use of the removed storage when replacing it, an OWC external SSD case will also be included (last photo). As it is an old model, you cannot expect it to run smoothly. Also, some apps (such as LINE) cannot be installed, so please consider these points before purchasing.