Hardmac follows up on the issues surrounding the 1.5/3.0 Gbs SATA interface on new MacBook Pros. As you’ll recall, for some reason Apple’s new high-end laptops can’t go to SATA II 3.0 Gbs speeds but instead are relegated to 1.5Gbs.  

Hardmac ran a test with two high end SSDs to see if there would be a speed increase on the top end 15-inch MacBook Pro.  The results were the same: SSDs were faster on older, slower Mac hardware.  They also tried installing diffrent versions of the MacOS on the MBP without getting a different result.  This would seem to indicate that the issue is not software related.

  • WE have removed the SuperDrive and installed two SSDs. Despite that both SSDs are in SATA II format, there are limited to 1.5 Gbits/s as highlighted. We have carried out some performance tests with the Falcon SSD: 130 MB/s reading and 110 MB/s writing. This is in average 100 MB/s less that what we recorded when performing the same experiment with the previous MacBook Pro Unibody Rev 1 (MBPUR1).
  • In order to eliminate a potential link to a Mac OS X version, we cloned the special build (9J3050) shipped with the new MBP 15" 3.06 GHz, and installed it on the MBP Unibody Rev1: SATA port was then identified as 3 Gbits/s.

Apple so far has refused to comment despite many attempts to find out what is going on.  We’re still hopeful this can be fixed with a firmware update, as the NVIDIA MCP79 Mobos support 3.0Gbs transfer rates.


FTC: We use income earning auto affiliate links. More.

Check out 9to5Mac on YouTube for more Apple news:

You’re reading 9to5Mac — experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Don’t know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel

About the Author