Apple released MacBook Pro EFI Firmware Update 1.9 Thursday, a firmware update that addresses a “rare issue that may cause the system to freeze during startup or intermittently stall during operation.” The company said that the update also improves compatibility with external displays.
The issue being addressed is listed as affecting MacBook Pro (15-inch, Mid 2010) and MacBook Pro (17-inch, Mid 2010), the most recent updates to the MacBook Pro product line.
You can download the firmware update through Software Update in Mac OS X, or you can download it directly from the update’s page on Apple’s support site. It’s a 2.16MB download.