When I attempted to upgrade the firmware on my e75db from 5.10 to 5.11 my Macbook repeatedly crashed in the middle of the upgrade. The laptop has never crashed before so I was a bit perplexed. However the upgrade ran smoothly when I changed machines from the macbook to a desktop computer with an older OS.
Maybe due to climate change
specs:
e75 serial number: e75-06-1025
macbook: 10.6.2 2.16GHz Core 2 Duo 2GB DDR2 SDRAM
desktop:OS10.5.4, 2.67GHz Core 2 Duo 4GB DDR SDRAM