Put an end to the uncertainties of upgrading your Mac with a precise Crucial Memory upgrade for Mac systems. Apple computers often have very specific memory requirements, such as special component densities, speeds, and SPD application specifications. That's why it's important to use memory designed specifically for your Mac. Trust the manufacturer, who has more than ten years of experience making and designing memory for all types of Apple computers - trust Crucial Memory to optimize the performance of your Mac system.Reliability for Mac SystemsYou expect intuitive, reliable performance from your Mac system. And if you're a Mac Pro user, you expect the business-critical reliability of a workstation. Expect the same from your memory. Every module that leaves the premises has been extensively tested at component level for voltage and temperature stability, signal integrity and software compatibility. In addition, the modules are lead-free and halogen-free.1 Speed and energy efficiency for Mac systemsA memory upgrade is the fastest, easiest, and most cost-effective way to get more performance out of your Mac system. With standard DDR3 modules, Mac systems can achieve speeds of up to 1600 MT/s. DDR3L modules are available for newer Mac systems. These modules enable speeds from 1866 MT/s and consume 10% less power for improved energy efficiency.