OWC 240GB Aura SSD and Envoy Storage Solution for MacBook Air 2010-2011 Designed First and Best for your Mac. No Software or Hacks needed - 100% compatible with all Mac OS Versions including Yosemite 10.10.x Compatible with MacBook Air 2010 & 2011. Model ID#s: MacBookAir4,2 | MacBookAir3,2 | MacBookAir4,1 | MacBookAir3,1 Includes 240GB Aura SSD, Envoy USB Enclosure, Carrying Case, USB3.0 cable, Pentalobe Compatible Driver, & Torx T-5 Screwdriver, 3 Year OWC SSD Limited Warranty Free installation videos and support available from OWC's site OWC's Aura SSD provides up to nearly 8x the capacity over factory SSDs while offering Faster Performance vs. Factory Options, One of the fastest Internal SSDs available, get up to 507MB/s...3x faster than factory <span class="a-text-bold">More SPEED</span>get up to 275MB/s...68% faster than factory. <span class="a-text-bold">More STORAGE</span>get up to nearly 16x more capacity! <span class="a-text-bold">More OPTIONS</span>choose from 120GB, 240GB, 480GB or 1.0TB models. <span class="a-text-bold">More COMPLETE</span>includes all the tools and free video necessary for installation <span class="a-text-bold">More SPEED</span>get up to 507MB/s...3x faster than factory. <span class="a-text-bold">More STORAGE</span>get up to nearly 16x more capacity! <span class="a-text-bold">More OPTIONS</span>choose from 120GB, 240GB, 480GB or 1.0TB models. <span class="a-text-bold">More COMPLETE</span>includes all the tools and free video necessary for installation <span class="a-text-bold">DuraWrite</span>extends the endurance of your Solid State Drive (SSD). <span class="a-text-bold">Intelligent Block Management &amp; Wear Leveling</span>automatically distributes data evenly across the entire SSD. <span class="a-text-bold">Intelligent Read Disturb Management</span>spreads the active read/write across the flash components eliminating data corruption caused by constant use. <span class="a-text-bold">Intelligent &#034;Recycling&#034;</span>for advanced free space management gradually re-writes data across the SSD over time to ensure data never gets corrupted. <span class="a-text-bold">RAISE</span>(Redundant Array of Independent Silicon Elements) protects the data on your drive similar to having a RAID setup. <span class="a-text-bold">Best-in-Class ECC Protection</span>for longest data retention and drive life.