DescriptionMacBook 13in (Mid 2010 Aluminum Mid 2009), MacBook Pro 15in (Aluminum Mid 2009 Core i5/i7 Mid 2010); MacBook Pro 17in (Aluminum Early Mid 2009 Core i5/i7 Mid 2010); iMac Intel Core 2 Duo 20in/24in (Early 2009); iMac Intel Core 2 Cuo 21.5in (Late 2009); iMac Intel Core 2 Duo/i5/i7 27in (Late 2009) From the Manufacturer Kingston System-Specific Desktop and Notebook Memory Kingston offers extremely reliable, high-performance desktop memory and sells more notebook upgrade memory than anyone in the world. Every module is customized and tested to meet the exact specification requirements of each system. Kingston uses only the most reliable and respected components in the industry to ensure maximum performance and legendary Kingston reliability. Customized and tested to meet the exact specification requirements of each system Designed for use in brand-name systems, with 100% compatibility Kingston System-Specific Desktop/Laptop Memory is designed for use in brand-name computer systems and allows you to purchase by brand and system model name. This memory comes with a 100-percent compatibility guarantee and 100-percent testing in the system or family of systems for which it's designed, for added reassurance. Full product return privileges ensure total peace of mind. Why Choose Kingston? Kingston Technology Company, Inc., offers a wide range of computer memory and Flash products plus all the services to support your memory needs. Founded in 1987, Kingston is committed to providing its customers with the best memory products for the latest and most requested technologies. When you order Kingston memory, you get quality components, engineering expertise, 100-percent testing, free 24/7 technical support, and a lifetime warranty. Best of all, Kingston memory is backed by the legendary reliability that has made the company the world's independent memory leader. Testing Kingston has developed one of the most advanced testing facilities in the industry. Kingston employs a multi-tiered testing system to ensure quality control throughout the design and manufacturing process. Kingston is one of the few manufacturers that qualifies all components and tests memory at all stages of production. As a result, the mean time between failure ratings exceeds 500 years. This complete package makes for the consistent product reliability and compatibility that Kingston customers have come to depend on for more than two decades. Lifetime Warranty All Kingston memory products are backed by a lifetime warranty, free technical support and legendary Kingston reliability. Which Kingston Memory Device is Right for You? System-Specific Memory ValueRAM Memory Desktop/Notebook Server Desktop/Notebook Server Server Premier Every module is customized and tested to meet the exact specification requirements of each system Guaranteed to be 100% compatible with the hardware, software and diagnostic tools of the systems for which it is designed Industry standard memory designed for customers who purchase memory by specification High performance, stability and long-term reliability as well as validation on all the key server board manufacturer sites Designed specifically for mission-critical server systems that require maximum uptime and stability