Mac OS X v10.6.7 Update for early 2011 MacBook Pro. The Mac OS X 10.6.7 Update for MacBook Pro is recommended for all early 2011 MacBook Pro models. It includes general operating system fixes for Mac OS X Snow Leopard that enhance the stability, compatibility, performance, and security of your Mac, including fixes that:1  Improve the reliability of Back to My Mac.2  Resolve an issue when transferring files to certain SMB servers. 3  Address various minor Mac App Store bugs.t includes general operating system fixes for Mac OS X Snow Leopard that enhance the stability, compatibility, performance, and security of your Mac, including fixes that: 1  Improve the reliability of Back to My Mac. 2  Resolve an issue when transferring files to certain SMB servers. 3  Address various minor Mac App Store bugs.