While it is said to affect only a "small number of customers," I am glad this update was released (I'm small apparently). Apple released an update to fix "intermittent hard drive related pauses" that could impact performance.
The update is for the following machines:
- MacBook Pro (17-inch, Mid 2009)
- MacBook Pro (15-inch, Mid 2009)
- MacBook Pro (15-inch, 2.53GHz, Mid 2009)
- MacBook Pro (13-inch, Mid 2009)
- MacBook Pro (17-inch, Early 2009)
- MacBook Pro (15-inch, Late 2008)
- MacBook (13-inch, Mid 2009)
- MacBook (13-inch, Early 2009)
- MacBook (13-inch, Aluminum, Late 2008)
- MacBook Air (Mid 2009)
- MacBook Air (Late 2008)
- iMac (20-inch, Mid 2009)
- iMac (24-inch, Early 2009)
- iMac (20-inch, Early 2009)
- Mac mini (Early 2009)
The update is available for both Snow Leopard and Leopard.