Tested and working. Comes with power cord. Yosemite OS. The Apple A1418 iMac 21" 2013 is an all-in-one desktop computer with an Intel i5 processor, 8GB RAM, and a 1TB HDD. It comes with Yosemite OS and has USB 3.0 and 2.0 connectivity options. The sleek design and high-quality performance make it ideal for various tasks, whether for work or entertainment. The iMac is a reliable and versatile choice for users looking for a dependable desktop solution from Apple.