Review of Mercury Aura Pro Express 6G Solid State Drive and Envoy Storage Solution

TestFreaks Data
Galaxy S6 Cases on Amazon

The MacBook Air has been my favorite computer since its “rebirth” back in 2010. At that time Apple replaced the internal mechanical hard drive with an SSD making it one of the fastest laptops on the market. These models and the 2011 ones topped out at 256GB but most folks like myself bought the 64 or 128 GB versions as they were the more affordable models.

Of course many folks including myself soon realized that 64GB or 128GB is definitely not enough storage capacity. For those who want to run Parallels or Fusion that will eat a fair percentage of ones storage on a 128 GB model.

Back when these machines were first released upgrading to the larger capacity SSD via Apple added some significant cost to the machine. For those regretting not getting a larger capacity drive cry no more.

OWC the company known for their Mac upgrades have released the Mercury Aura Pro Express 6G Solid State Drive and Envoy Storage Solution. This bundle includes a faster SSD drive than the native MacBook Air models while providing an enclosure for the original Apple SSD. If you can use a screwdriver, then your can swap out your original SSD for the Mercury Aura Pro Express 6G SSD. These drives are designed for MacBook Air 2011 editions and come in 120GB, 180GB, 240GB or 480GB models.

Besides increasing the capacity of your MacBook Air these drives are also faster than the factory installed SSDs. The OWC Mercury Aura Pro Express 6G Sandforce enabled with firmware level garbage collection meaning the SSD’s performance should not degrade over time.

The Mercury Aura Envoy arrives in a black cardboard package with the device visualized on the top indicating it works with either Mac or PC and uses the USB 3.0 standard. On the front side of the package is an actual size image of the external enclosure with additional images on the left and right side. The bottom of the package lists features, system requirements, and specifications along with package contents.


 Aura02 Aura03

 Aura04 Aura05

Opening the box we find the Mercury Aura Pro Express 6G SSD, the Envoy SSD enclosure, a USB 3.0 cable, Torx screwdriver, a Pentalobe screwdriver and a small Phillips screwdriver along with two adhesive rubber pads, velvet carrying case and owners manual/assembly guide. The SSD comes packaged in an antistatic bag nestled in a plastic clamshell packaging commonly found with computer memory sticks.

Aura06 Aura07

 Aura08 Aura09 

OWC offers the Mercury Aura Pro Express 6G SSD in 120GB, 180GB, 240GB or 480GB capacities. For today’s review we are looking at the 256 GB model.

The Envoy SSD enclosure is composed of aluminum and has a same tapering incline as the MacBook Air. At quick glance one could mistake it like an external battery more than a storage solution.

On the left side we see the USB 3.0 connector with an LED found on the top. Flipping over the enclosure on the bottom are two screws. Inside the Envoy is a circuit board for connecting the original Apple SSD.


 Aura11 Aura12

While the 2012 MacBook Airs feature USB 3.0 ports, the 2011 version sadly do not; meaning you will be relegated to USB 2.0 speeds with your old SSD housed in the Envoy enclosure.


Mercury Aura Pro Express 6G Solid State Drive and Envoy Storage Solution

Upgrade your 2011 MacBook Air’s SSD to greater 6G speeds and capacity, plus reuse the original SSD as a sleek new external drive!

  • One of the fastest internal SSDs available…and built in the USA!
  • Ultra-efficient Block Management & Wear Leveling
  • Includes sleek, tapered aluminum Envoy storage solution, Torx T-5 screwdriver, and a Pentalobe compatible driver
  • OWC Free Install Videos make it easy to upgrade!
  • 3 Year OWC Warranty


240GB Mercury Aura Pro Express 6G
Solid State Drive and Envoy Storage Solution

for MacBook Air 2011 Edition

OWC’s Mercury Aura Pro Express SSD provides up to nearly 8x the capacity over the maximum available factory SSDs while offering up to 3x Faster Performance vs. Factory Options.

  • More SPEED up to 507MB/s…3x faster than factory.*
  • More STORAGE up to nearly 8x more capacity!**
  • More OPTIONS choose from 120GB, 180GB, 240GB or 480GB models.
  • More COMPLETE includes all the tools and free video necessary for installation

Everything you need in one package, immediately ready to assemble:

  • Reuse the factory SSD as an external storage solution.
  • Take your data with you – Small enough to keep in a pocket or laptop case!
  • Easily add additional laptop storage with no AC adapter required.

The Mercury Aura SSD line features industry leading SandForce DuraClass Technologies:

  • DuraWrite extends the endurance of your Solid State Drive (SSD).
  • Intelligent Block Management & Wear Leveling automatically distributes data evenly across the entire SSD.
  • Intelligent Read Disturb Management spreads the active read/write across the flash components eliminating data corruption caused by constant use.
  • Intelligent "Recycling" for advanced free space management gradually re-writes data across the SSD over time to ensure data never gets corrupted.
  • RAISE (Redundant Array of Independent Silicon Elements) protects the data on your drive similar to having a RAID setup.
  • Best-in-Class ECC Protection for longest data retention and drive life.

The Envoy offers the perfect companion storage solution for your MacBook Air

Get the ultimate combination of elegance and functionality in a sleek, portable external storage solution designed to complement the MacBook Air – in both appearance and performance. Its super-speed USB 3.0 interface is capable of speeds up to 500MB/s to ensure your workflow moves as fast as you do, and is backwards compatible with USB 2.0. Its bus-powered design means no AC power adapter is required making it an ideal portable Plug and Play solution – just plug the USB cord into your computer and the Envoy is ready to go.

Once again, OWC provides Mac users an upgrade path that delivers higher performance, functionality, and reliability! Whether you own or are considering a 2011 base model 11? MacBook Air with a 64GB Solid State Drive or the top of the line 13? model with a 256GB SSD, OWC’s Mercury Aura Pro Express 6G SSD offers 3x higher speed than the factory SSD…. up to 507MB/s and up to 8x more storage capacity than factory options.

More Options

Unlike the factory pre-configured models with no other SSD choices offered, the OWC Mercury Aura Pro Express 6G gives you the freedom to choose from a variety of sizes to meet your storage needs. 

Better by Design

"Mean Time To Failure" – We all know that nothing lasts forever. But that doesn’t mean you shouldn’t get the most out of your investment. OWC SSD with DuraWrite™ Technology, optimizes writes to the flash memory over conventional controllers increasing the overall endurance and reliability of the complete SSD. Highly intelligent block management and wear leveling also extends the overall endurance. This adds up to a MTTF that is higher than most SSDs and enterprise class hard drives on the market today.

Synchronous Interface NAND

To achieve the higher bandwidth potential of the SATA 6Gb/s bus standard, the OWC Mercury Aura Pro Express 6G SSDs utilize Synchronous Toggle NAND instead of commonly utilized Asynchronous NAND. Synchronous NAND enables reads and writes to be "synced" with the SSD processor’s clock signal for maximum data throughput.
*Random 4K write data rates of 57.56 for OWC SSD vs 18.49 for Apple factory stock SSD
**OWC SSD Maximum total flash capacity 512GB before 7% overprovisioning with 480GB actual usable capacity compared to Apple 128GB Flash maximum option for 11.1" model that provides a formatted capacity of 121GB (121 x 4 = 484).

The installation process involves opening your MacBook Air with the included Torx screwdriver, unscrewing the Pentalobe locking screw, removing the original SSD and swapping it with the Mercury Aura SSD. Reseal the MacBook Air and then place the original SSD into the Envoy enclosure. During this SSD exchange I identified my drive was the faster Samsung model rather than the Toshiba ones.

Aura13 Aura14 Aura15 Aura16 Aura17 Aura18

If you have any troubles with the installation process OWC provides a tutorial video.

At this point you can clone your original SSD from the USB drive using Carbon Copy Cloner or start fresh with their new SSD using the original SSD’s restoration partition via this process.


 Aura20 Aura21

To copy your original drive boot from the USB connected Envoy while holding the Option key down. From the drive selction screen choose your original hard drive and hit Enter. You will boot into OS X with the newly installed Aura SSD appearing as an uninitialized drive. Choose the initialize option that opens the Disk Utility application. From here format the drive using Mac OS Extended (Journaled) as the file system. Once formatted the drive capacity is 239 GB.

Aura22 Aura23

Next download and install Carbon Copy Cloner, make sure you are running the latest version so that you can clone the OS X Lion restoration partition to the Aura SSD. Select your source partition and target then Carbon Copy Cloner will warn you about the hidden restoration partition, which it will copy to the Aura if you choose to do so. This is highly recommended, as OS X Lion does not come with an install disk with the MacBook Airs.


 Aura25 Aura26 

Now start the long cloning process and grab yourself a coffee and your iPad. My 128GB drive took an hour to copy over via the USB connection. Too bad the 2011 MacBook Airs do not have a USB 3.0 port, which would make this process much faster.


So how does the Mercury Aura Pro Express SSD compare to the Samsung SSD 128 GB SSD? My boot time to desktop from pressing the power button dropped from 26 to 21 seconds while the time to my fully functional active desktop went from 38 to 31 seconds.

Using XBench to test the drive speeds the Sequential Reads went from 189.43 MB/s to 297.80 MB/s while Sequential Writes went from 228.19 MB/s to 345.57 Mb/s.

Aura28 Aura29


The BlackMagic Disk Speed Test found on the Apple app store produced writes of 245.4 MB/s vs.261.4 MB/s and reads of 263.3 MB/s vs. 468.4 MB/s.

Aura31 Aura32 


In real world testing a 733.7 MB .avi file took 6.3 sec on the stock SSD and 4.7 sec via the OWC SSD. Moving a larger 2.97 GB iPhoto Library took 63.6 sec versus 25.5 sec on the Mercury Aura Express.


Overall the speed improvements of the OWC SSD were noticeable in both real world use and via benchmarks. While the native MacBook Air is fast, adding the Mercury Aura Pro Express SSD is like turbo charging it.

Aura01 Aura08 Aura07 Aura10

If you own one of the more recent 2011 MacBook Air models and are finding that your storage capacity is lacking or your machine is not fast enough then OWC’s Mercury Aura Pro Express 6G Solid State Drive and Envoy Storage Solution is what the doctor ordered. Swapping out the original SSD for this new one is a simple as using a screwdriver and replacing a memory stick.

The included Envoy SSD enclosure allows the factory SSD to be reused as an external drive utilizing the faster USB 3.0 port providing additional storage capacity for your Apple machine. While the 2011 MacBook Airs lack this faster USB connection it is backwards compatible with USB 2.0 connections.

Probably the biggest reason why some may balk at picking up the Mercury Aura Pro Express 6G Solid State Drive and Envoy Storage Solution is its price. The 240 GB cost a penny under $350 while the 480 GB capacity model comes in at ¾ the price of an entry level MacBook Air making it an expensive proposition. However when comparing the upgrade prices when customizing the MacBook Air these prices are not too out of line.

Overall I am happy with the speed improvements and the increased capacity on my MacBook Air using the Mercury Aura Pro Express 6G Solid State Drive and Envoy Storage Solution. For those who regret getting their MacBook Air with a smaller capacity SSD, this kit is a perfect way to remedy that sorrow.


10 recommended5


+Increases speed of an already zippy MacBook Air
+Provides larger storage capacity
+Allows the reuse of the factory installed SSD as a USB 3.0 enclosure



To learn more about our review policy please visit this page HERE.

Leave a Reply

Your email address will not be published. Required fields are marked *